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07-30-2009
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Supermoto Abuser
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Join Date: Jun 2009
Posts: 135
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How are the big 2strokes for power delivery? I've always thought 2strokes were like light switches - either full throttle in the powerband or nothing...which seems like something you wouldn't want as you're coming off the apex.
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07-30-2009
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Supermoto Junkie
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Join Date: Mar 2007
Posts: 3,462
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Quote:
Originally Posted by 1badhusky
How are the big 2strokes for power delivery? I've always thought 2strokes were like light switches - either full throttle in the powerband or nothing...which seems like something you wouldn't want as you're coming off the apex.
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the bigger the bore the more smoother the powerband is.
__________________
cr500af aka satan's supermoto chopped up
07 sxv 5.5 "meatball" sold
09 crf450r
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07-31-2009
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Supermoto Addict
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Join Date: Aug 2006
Posts: 389
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PLEASE SEE DYNO GRAPH IN NEXT POST
To further the confusion about what people are referring to when talking about dyno numbers....this is for my Vertemati 600 . This is on a Factory Eddy Current dyno.....which supposedly reads about 10% lower than the more commonly referred to dynojet #'s.
This may also make interesting reading for some : http://www.factorypro.com/dyno/true1.html
Last edited by mg15 : 07-31-2009 at 07:55 AM.
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07-31-2009
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Supermoto Addict
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Join Date: Aug 2006
Posts: 389
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07-31-2009
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Supermoto Addict
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Join Date: Aug 2006
Posts: 389
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Quote:
Originally Posted by alohar1
the bigger the bore the more smoother the powerband is.
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I always thought that the bore/stroke ratio was more important on two strokes ?
"big bore" kitted two strokes have always had a rep for having a narrow powerband w/a hard hitting character . |
07-31-2009
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Supermoto Addict
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Join Date: Sep 2008
Posts: 228
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Yeah I was looking foir a cr500 and found the street titled kx500. Both fun bike.
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07-31-2009
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Supermoto Junkie
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Join Date: Sep 2007
Location: Austin, TX
Posts: 947
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It's easy to have a really broad wide powerband w/ a big bore 2 stroke.
Heck I build one myself. My 300cc top end on my 250SX w/ porting, different pipes, altering base gaskets, and different compression levels has right at the same peak hp as it did as a 250 but the powerband is just super wide. It starts on the bottom and literally pulls very smooth and strong right up until it hits the rev limiter.
Not running a 'tuned' expansion chamber is key to this. You will have less peak but a wider powerband will be the result.
__________________
2008 KTM 690 SMC, MX-Tech suspension, full FMF exhaust, DNA filter and modified airbox, tubeless tire conversion, cut down seat, alternate 3T offset, Bridgestone rain slicks;
2008 KTM 300SX 300 (started life as a 250SX)
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07-31-2009
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Supermoto User
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Join Date: Jul 2009
Location: California
Posts: 59
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How reliable is the motor after all these power mods i.e. turbos etc.? I'm plannin on gettin a DRZ 400-sm real soon and want to make more power out of it while still having a reliable bike
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Rugged Radios ... Your 2-Way Communication Specialist!
Andy @ 1(888)541-RACE
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07-31-2009
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Supermoto User
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Join Date: Aug 2007
Location: seattle worshington
Posts: 36
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search for a thread on here by uncle bob. 
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'99 dr650
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08-01-2009
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Supermoto Junkie
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Join Date: Aug 2006
Location: the Netherlands
Posts: 793
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The highest HP bike I know of is the 89hp SXV550 tuned by www.qms.be
Blue is stock, red is tuned...
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08-01-2009
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Supermoto User
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Join Date: Dec 2008
Posts: 18
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Quote:
Originally Posted by millerswrsupermoto
You do realize that a stock 06' YZ 450F produces 59hp. So mine is not far fetched at all. Half of all 450 motorcross bikes have 60-70 hp depending on the amount of money you spend. And I've seen a lot of them because my family ownes two Yamaha dealerships.  |
A stock YZ450F pruduses around 50hp so 49hp is more likely.
You have any dyno charts of your bike?
The SM that you can get the most HP out of is probarly one of the bikes with a RD350 engine stuffed in.
100++ HP is easy if the chassi can handle it. |
08-02-2009
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Supermoto Abuser
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Join Date: Feb 2005
Location: Colorado
Posts: 115
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Gawd! I get sick of these cut and past spam attacks like the last two posts.
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08-03-2009
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Supermoto Addict
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Join Date: Aug 2006
Posts: 389
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Bet you cant wait for the cut and paste attack about getting an "EASY" 100++ hp from an Rd350
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08-04-2009
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Supermoto Abuser
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Join Date: Feb 2005
Location: Colorado
Posts: 115
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Whoa! the two other spam posts before mine got whacked. Good riddance!
BTW, now that they're gone it makes my post look like I'm talking like a douchebag to the NEXT two previous posts. Sorry for the confusion guys.
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08-07-2009
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Supermoto User
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Join Date: May 2008
Posts: 21
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Quote:
Originally Posted by hey Johnny Park
Horsepower goes up when the Revs go up. Torque is the force that moves you. When RPM's go up torque goes down, so does the Horsepower.
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Torque is what you can do in an instant, power is what you do with that torque over time. Power = work/time; work = force x distance. |
08-07-2009
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Supermoto User
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Join Date: Jun 2009
Location: Västerås, Sweden
Posts: 15
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Ducati Hypermotards have pretty decent power, but they are on the borderline to supermotards  I think that old XR turbo from sweden is about 100rwhp if I remember correctly. My local KTM dealer asked me if I wanted to get my lc4 tuned, appearantly there is an austrian company that gets about 90hp out of the lc4 machines. But reliability was still an issue
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Husaberg FE450 -08
Even alcohol can bend the room...
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08-08-2009
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Supermoto User
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Join Date: Sep 2006
Posts: 10
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And don't forget about the 950SM. Its a torque monster compared to singles
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08-08-2009
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Supermoto Junkie
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Join Date: Oct 2004
Location: Vancouver, Canada
Posts: 1,137
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This crazy bastard has built quite a beast, I just don't recall anything about it. The pics from a few years ago; maybe someone remembers...
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08-09-2009
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Supermoto Junkie
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Join Date: Jun 2005
Location: San Francisco, CA
Posts: 1,083
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Holy big single cylinder Batman! Like 750cc's or more?
A totally custom motor or some grafted/mutated parts from a XR650R?
__________________
Motorcycle Tire Services
http://mototireguy.com
04 Honda CBR1000RR
05 Husaberg FS650E (Sold  )
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08-09-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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on ebay right now theres a cr500 engine thats supposed to be making 103 hp on alcohol.
just thought someone in this thread might be interested.
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08-10-2009
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Supermoto User
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Join Date: Sep 2008
Posts: 26
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Quote:
Originally Posted by bwh998
on ebay right now theres a cr500 engine thats supposed to be making 103 hp on alcohol.
just thought someone in this thread might be interested.
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For those that are a link would be helpful  |
08-10-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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Quote:
Originally Posted by jokerflingo
For those that are a link would be helpful |
its been a few days since i found it.... |
08-10-2009
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Supermoto Junkie
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Join Date: Jun 2005
Location: San Francisco, CA
Posts: 1,083
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I read something somewhere on the internet about someone living somewhere, who was getting something like one hundred hp out of a single cylinder engine. 
Sorry no bike details, don't know if it was pump gas or nitro, EFI or carbed, sorry no links or pics. 
Sorry I couldn't help myself.
__________________
Motorcycle Tire Services
http://mototireguy.com
04 Honda CBR1000RR
05 Husaberg FS650E (Sold )
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08-11-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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Quote:
Originally Posted by supertireguy
I read something somewhere on the internet about someone living somewhere, who was getting something like one hundred hp out of a single cylinder engine.
Sorry no bike details, don't know if it was pump gas or nitro, EFI or carbed, sorry no links or pics.
Sorry I couldn't help myself. |
yeah, because its not like i didn't tell you the site where i found it or anything. sorry if going to ebay and searching the term cr500 engine was too complicated a task for you...
* and i did say that it was on alky, no nitro or pump gas. so maybe searching ebay is too much work for you, but at least you could bother reading the posts which you reply to?
Last edited by bwh998 : 08-11-2009 at 05:05 AM.
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08-11-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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out of curiousity i went and googled it, and look what a 3 second search turned up:
http://saberracing.com/phpwcms_tmp/t...memxinySp0.jpg
"This is my favorite topic, and if it weren’t yours also, you wouldn’t be here right?
After six months of testing and tuning of port layouts, head designs, ignitions, pipes, and carburetion, I have finally pulled together a complete 500 Sabertooth package that is both extremely powerful, at just over 103 hp and 68 ft/lbs torque, but also quite ride able and user friendly. As you can see from the dyno chart, the ultra wide torque curve is generated way down low around 6000 rpm and carried across in a wide and useable powerband to 9500 rpm. This shows you don’t have to be a pro rider to benefit from this versatile power plant."
http://saberracing.com/index.php?id=2,7,0,0,1,0
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08-15-2009
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Supermoto User
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Join Date: Jun 2009
Posts: 1
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Quote:
Originally Posted by bwh998
out of curiousity i went and googled it, and look what a 3 second search turned up:
http://saberracing.com/phpwcms_tmp/t...memxinySp0.jpg
"This is my favorite topic, and if it weren’t yours also, you wouldn’t be here right?
After six months of testing and tuning of port layouts, head designs, ignitions, pipes, and carburetion, I have finally pulled together a complete 500 Sabertooth package that is both extremely powerful, at just over 103 hp and 68 ft/lbs torque, but also quite ride able and user friendly. As you can see from the dyno chart, the ultra wide torque curve is generated way down low around 6000 rpm and carried across in a wide and useable powerband to 9500 rpm. This shows you don’t have to be a pro rider to benefit from this versatile power plant."
http://saberracing.com/index.php?id=2,7,0,0,1,0
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Love to shoe horn that into my 06 KTM 625SMC |
08-20-2009
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Supermoto User
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Join Date: Sep 2008
Posts: 39
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Quote:
Originally Posted by supertireguy
Holy big single cylinder Batman! Like 750cc's or more?
A totally custom motor or some grafted/mutated parts from a XR650R?
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That started life as a dr-650 motor. From the base gasket up it's all machined from billet. Twin cams,fuel injection, must have cost a small fortune. Wonder what he put it in, its way taller than stock with the twin cam head. |
08-20-2009
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Supermoto Addict
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Join Date: Jul 2008
Location: Fort Wayne, IN
Posts: 392
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direct injection two stroke will start putting big numbers down...soon enough.
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08-20-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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Quote:
Originally Posted by versysrider
That started life as a dr-650 motor. From the base gasket up it's all machined from billet. Twin cams,fuel injection, must have cost a small fortune. Wonder what he put it in, its way taller than stock with the twin cam head.
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thanks for that because i was wondering about that one too. i would like to see more of the head and how he managed to get the intake runners so straight. |
08-20-2009
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Supermoto Addict
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Join Date: Jun 2008
Posts: 271
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Screw the biggest horsepower, I wanna know who has the lightest sumo. I'd put money on that one in a race between the 2. Depending on the track of course, but we are talking about sumos.
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08-21-2009
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Supermoto Junkie
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Join Date: Sep 2007
Location: Austin, TX
Posts: 947
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What he said.
I want 80+ rwhp and 230#.
__________________
2008 KTM 690 SMC, MX-Tech suspension, full FMF exhaust, DNA filter and modified airbox, tubeless tire conversion, cut down seat, alternate 3T offset, Bridgestone rain slicks;
2008 KTM 300SX 300 (started life as a 250SX)
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08-21-2009
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Supermoto Addict
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Join Date: Jun 2008
Posts: 271
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Quote:
Originally Posted by Suns_PSD
What he said.
I want 80+ rwhp and 230#.
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Haha, how do u expect to steer with your front wheel in the air 100% of the time??
Give me 40hp and 200lbs. |
08-21-2009
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Supermoto User
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Join Date: Aug 2009
Location: Knoxville, TN
Posts: 32
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Quote:
Originally Posted by knockout
Haha, how do u expect to steer with your front wheel in the air 100% of the time??
Give me 40hp and 200lbs.
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Heck, give me anything under 220 with any power at all & it'll do.
__________________
KX500SM, KLR705, 525EXC
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08-21-2009
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Supermoto Addict
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Join Date: Jun 2009
Location: Chicago
Posts: 472
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If you lads don't mind me chiming in on something related but different and for my own selfish reasons, what do you think my '07 690sm is putting to the wheel with a Full Leo System and a TuneBoy Tune?
Stock #'s
Horsepower: 63 bhp at 7500 rpm
Torque: 48 lb.-ft. at 6550 rpm
__________________
I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me - Hunter S. Thompson
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08-24-2009
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Supermoto Junkie
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Join Date: Sep 2007
Location: Austin, TX
Posts: 947
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Quote:
Originally Posted by knockout
Haha, how do u expect to steer with your front wheel in the air 100% of the time??
Give me 40hp and 200lbs.
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I have a 2008 250SX 2 stroke mx bike that has a 300 ported cylinder, trick carb, etc... It also weighs 210 (weighed it myself) ready to ride in MX trim.
I guarantee that it makes at least upper 40's for hp and that I could add less than 15# to get it streetlegal. And it has crossed my mind a few times to go that route.
But since I was pretty much raised on liter bikes I need some real hp and when you gear a bike to go say 100 mph it starts to feel a lot weaker all of the sudden.
So I love light weight but I still want to be able to loft the front tire while cruising down the freeway and would sacrifice a bit of weight gain to get that.
__________________
2008 KTM 690 SMC, MX-Tech suspension, full FMF exhaust, DNA filter and modified airbox, tubeless tire conversion, cut down seat, alternate 3T offset, Bridgestone rain slicks;
2008 KTM 300SX 300 (started life as a 250SX)
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08-24-2009
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Supermoto User
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Join Date: Aug 2009
Location: Knoxville, TN
Posts: 32
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Quote:
Originally Posted by Suns_PSD
So I love light weight but I still want to be able to loft the front tire while cruising down the freeway and would sacrifice a bit of weight gain to get that.
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Get a KX500. Throttle only wheelies at any speed you like.
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KX500SM, KLR705, 525EXC
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09-03-2009
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Supermoto User
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Join Date: Sep 2009
Posts: 2
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The guy with the xr650 turbo is benny (boost3, boostIII on forums) and he tried it up to 125 rwhp. Theres some pretty detailed threads but in swedish only.
Not sure if hes running 125hp in the vids tho.
http://www.youtube.com/watch?v=Tdh-phC8UDk
http://www.youtube.com/watch?v=LsqnQFb54V0
Other then that id give my left nut for a husaberg 750cc big bore kit not sure if jbsracing ever got the even bigger once made.
Easiest way for me would be loosing some weight tho cause all that mathers with hp is waight to hp ratio including driver :P
Quote:
Originally Posted by sonic reducer
that turbo xrr from sweden or someplace must have had a pretty good amount of power. to me that sounds like one of the more economical and reliable ways to get a thumper with more than 100hp. if built right you wouldnt have to spin it to the moon or build the internals much beyond a forged lo comp piston maybe. and it would for damn sure be more powerful, cheaper, and smoother than built na.
what are some of the built cr500's dynoing at?
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Last edited by SlackerDude : 09-03-2009 at 01:07 PM.
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09-03-2009
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Supermoto Addict
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Join Date: Sep 2008
Posts: 228
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Quote:
Originally Posted by motocash74
Get a KX500. Throttle only wheelies at any speed you like.
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Yeah mine is geared 15/42 and still throttle wheelie in any gear =0
Last edited by muleman : 09-03-2009 at 02:40 PM.
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09-04-2009
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Supermoto Abuser
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Join Date: Jul 2008
Posts: 121
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09-08-2009
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Supermoto User
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Join Date: Oct 2008
Posts: 14
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The Xr650R turbo from Sweden must be the supermoto with the highest HP. Think it has about 120-130hp...
http://www.youtube.com/watch?v=Tdh-phC8UDk
__________________
Xr650r-Sm and Husqvarna Wr 125 in the garage! 
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09-08-2009
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Supermoto User
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Join Date: Apr 2009
Location: Illinois
Posts: 36
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how much horsepower is the aprilia dorsoduro? not many of them in the states, but i want one.
http://dadunkzone.files.wordpress.co...soduro-750.jpg
__________________
2003 RM125, FMF pipe, works connections frameguards, protapers, and acerbis handguards 
2007 Drz400sm, full yosh stainless system, 3x3, JD jet kit, moose handguards. 
1997 Ford Taurus, G edition, silver on silver. 15 inch factory hubcaps. 3.0 v6.  it gets me around town, barely
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09-08-2009
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Supermoto Addict
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Join Date: Jan 2009
Location: Michigan
Posts: 273
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Speaking of which, why is the Aprilia dorsoduro labeled as a "supermoto" to begin with? I'm looking at the bike, then I'm staring at the specs and there isn't any reason why I'd classify it as anything besides a standard/naked bike.
They slap an extra 1" of travel front and rear and all of sudden it's now supermoto instead of a standard?
__________________
99 380exc plated
03 Raptor 660R Limited
00 RM125
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09-08-2009
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Supermoto Junkie
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Join Date: Mar 2007
Posts: 3,462
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You guys should be concerned with power to weight ratio. My wifes supermoto that I just built is a 150r with a 250r motor. Full tank of gas and full sumo trim is 190 with 40hp. And she only weighs 110 and I'm 165. Deadly combo. In the twisties it will SMOKE my sxv 550
__________________
cr500af aka satan's supermoto chopped up
07 sxv 5.5 "meatball" sold
09 crf450r
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09-09-2009
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Supermoto Abuser
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Join Date: Feb 2008
Location: Where the pegs meet the asphault
Posts: 141
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sorry to jack the thread, This isnt a SM but check it out
http://videos.streetfire.net/video/t...r-it_45714.htm
__________________
'07 YZ450F, Doug Henry Replica
EVO suspension done by Dan Moore,ProTaper complete triple trees, White Brothers Carbon Pro 2 ti/carbon full system, BRAKING set up,
Fluidyne radiators, CV4 hoses, Boysen high flow water pump
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11-02-2009
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Supermoto User
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Join Date: Oct 2008
Posts: 72
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11-02-2009
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Supermoto Junkie
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Join Date: Oct 2007
Location: finland
Posts: 807
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Quote:
Originally Posted by millerswrsupermoto
You do realize that a stock 06' YZ 450F produces 59hp. So mine is not far fetched at all. Half of all 450 motorcross bikes have 60-70 hp depending on the amount of money you spend. And I've seen a lot of them because my family ownes two Yamaha dealerships. |
60-70hp. 
talking about wheel hp or engine? in either case, bull...
__________________
2001 ktm 540exc sm/plated
2006 ktm 250sxs
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11-02-2009
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Supermoto Junkie
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Join Date: Oct 2007
Location: finland
Posts: 807
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Quote:
Originally Posted by supertireguy
I read something somewhere on the internet about someone living somewhere, who was getting something like one hundred hp out of a single cylinder engine.
Sorry no bike details, don't know if it was pump gas or nitro, EFI or carbed, sorry no links or pics.
Sorry I couldn't help myself. |
http://www.frauenschuh-tuning.at/frame.htm
__________________
2001 ktm 540exc sm/plated
2006 ktm 250sxs
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11-02-2009
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Supermoto Junkie
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Join Date: Mar 2006
Location: DFW (McKinney TX)
Posts: 767
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Quote:
Originally Posted by BackDraft_41
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That was so funny!
__________________
01 DRZ SM (Roll'n on 17's)
05 YZF R1 (STOLEN)
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11-02-2009
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Supermoto Addict
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Join Date: Aug 2009
Location: Waterloo Iowa
Posts: 238
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Quote:
Originally Posted by 484
hey that busa's fast but we all know you're gonna have more fun on the tard!
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I agree, I have 270rwhp accessible on my busa and I still have more fun riding my piped drz!!!
the busa scares me more but I love riding wheelies and goofing around on the tard!
__________________
2003 suzuki turbo hayabusa
2008 yamaha yz250f
2007 suzuki drz400sm
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11-02-2009
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Supermoto Abuser
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Join Date: Oct 2007
Location: Ohiopyle, PA
Posts: 101
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Quote:
Originally Posted by sakke83
60-70hp.
talking about wheel hp or engine? in either case, bull... |
It's rated off of the transmission not the rear wheel, and whatever to anything else just contact pro circuit to get a full race motor.
__________________
06' WR450 SM, 06' YZ 450
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