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.
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.
the bigger the bore the more smoother the powerband is.Originally Posted by 1badhusky
08 KTM 200xc
06 husky 510 smr (mine for now)
cr500af aka satan's supermoto chopped up
07 sxv 5.5 "meatball" sold
09 crf450r sold
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 06:55 AM.
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 .
Yeah I was looking foir a cr500 and found the street titled kx500. Both fun bike.
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)
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
Rugged Radios ... Your 2-Way Communication Specialist!
Chris @ 1(888)541-RACE
search for a thread on here by uncle bob.
'99 dr650
A stock YZ450F pruduses around 50hp so 49hp is more likely.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.
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.
Gawd! I get sick of these cut and past spam attacks like the last two posts.
Bet you cant wait for the cut and paste attack about getting an "EASY" 100++ hp from an Rd350
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.
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.
Ducati Hypermotards have pretty decent power, but they are on the borderline to supermotardsI 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
Husaberg FE450 -08
Even alcohol can bend the room...
And don't forget about the 950SM. Its a torque monster compared to singles
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...
Holy big single cylinder Batman! Like 750cc's or more?
A totally custom motor or some grafted/mutated parts from a XR650R?
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.
For those that are a link would be helpful
its been a few days since i found it....For those that are a link would be helpful
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...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.
* 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 04:05 AM.
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
Love to shoe horn that into my 06 KTM 625SMCout 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
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.
direct injection two stroke will start putting big numbers down...soon enough.
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.
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.
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)
Haha, how do u expect to steer with your front wheel in the air 100% of the time??
Give me 40hp and 200lbs.
Heck, give me anything under 220 with any power at all & it'll do.
KX500SM, KLR705, 525EXC
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
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)
Get a KX500. Throttle only wheelies at any speed you like.
KX500SM, KLR705, 525EXC
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
Last edited by SlackerDude; 09-03-2009 at 12:07 PM.
Yeah mine is geared 15/42 and still throttle wheelie in any gear =0
Last edited by muleman; 09-03-2009 at 01:40 PM.
heres a couple 250's that make 90 hp stock:
http://www.brceng.com/250fe.html
http://www.sgm-engines.com/testi/prodotti_gb.htm#
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!
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
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?
05 yz125
01 FZ1
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
08 KTM 200xc
06 husky 510 smr (mine for now)
cr500af aka satan's supermoto chopped up
07 sxv 5.5 "meatball" sold
09 crf450r sold
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 MX
'07 KX450F SMR
'06 R1 50th anniversary
Need a YZ SM set up? PM me
how about this one ?
http://www.youtube.com/watch?v=N-DuzXcQ4qM
60-70hp.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.
talking about wheel hp or engine? in either case, bull...
2001 ktm 540exc sm/plated
2006 ktm 250sxs
http://www.frauenschuh-tuning.at/frame.htmI 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.
2001 ktm 540exc sm/plated
2006 ktm 250sxs
That was so funny!
01 DRZ SM (Roll'n on 17's)
05 YZF R1 (STOLEN)
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 (for sale)
2008 yamaha yz250f
2009 ktm 690SMC
2007 suzuki drz400sm(sold)
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.60-70hp.
talking about wheel hp or engine? in either case, bull...
06' WR450 SM
06' YZ 450(sold)
09' TTR 110
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