Yea this may have been talked about before. I wanting to start doing some supermoto racing and was trying to keep the coast down, found a cr 250 2 stroke does anyone race any two strokes, I live in Georgia and will be riding it at middle kart track in Dublin GA, and Jennings GP fl. Any info would be great. Can the 250 stick with a 450 on the track. Or should i just go with a 4 stroke.
racing a 2 stroke supermoto is it good or bad idea?
turbo23
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2strokes can be competitive...it is mostly about the rider. I never raced my RM85 but I took it to a few track days and beat the pants off of 150's...the better riders beat me. They were on a kx 65 (proves ability wins) and a 150f (ridden by pro sm racer Jason Conlon)
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go for it
I started off on a kx 125 in 2003, it was the best thing I could have done. It taught me to control the bike when the power came on. It did hurt a little in the tight corners but that taught me to carry my speed. When we needed more power we went to alcohol. That was fun. just get out there and have some fun and don't be discouraged with the bike.
I started off on a kx 125 in 2003, it was the best thing I could have done. It taught me to control the bike when the power came on. It did hurt a little in the tight corners but that taught me to carry my speed. When we needed more power we went to alcohol. That was fun. just get out there and have some fun and don't be discouraged with the bike.
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Guys, I totally goofed this... What I meant was, is a 250 MORE broad than the peaky 500?
I know the 250 will have less power... But if it's easier to live with, I rather have the 250 for the inner city/ back roads riding I do.
If they have the same "lightswitch" powerband,
then guess which one I rather haveSorry about asking this, but I have no idea what terms to search for to find this out. And dirt is one thing, street riding is another...
EDIT: And can you mellow out a 500's PBand?
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you can mellow out the power band on any 2 stroke by using a flywheel weight. It will make the bike much less peaky and easier to ride in the slow stuff!
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Never raced, but I've ridden my dad's YZ250 that I converted on a kart track and it was a lot of fun! I'm not the fastest guy on any bike, so I was getting my doors blown off by the better riders, but it wasn't the bike's fault. 4t is definately easier to ride, but I had a lot of fun on the 2t. So much fun, that I am probably going to pick up a YZ250 for myself because I have wheels that will fit it. Or I may shitcan the idea and get another KTM, who knows!
I ride my KTM 300 smoker on the street a lot and it is fun. It's more of a momentum bike once you break 70mph though. They may be ~55hp, but it's thrown down a hell of a lot different than a 4 stroke. I have it geared so it isn't screaming at 55, so the gears are spaced out more than they probably should be. Wouldn't be a problem on a kart track with 14-47ish gearing.
I ride my KTM 300 smoker on the street a lot and it is fun. It's more of a momentum bike once you break 70mph though. They may be ~55hp, but it's thrown down a hell of a lot different than a 4 stroke. I have it geared so it isn't screaming at 55, so the gears are spaced out more than they probably should be. Wouldn't be a problem on a kart track with 14-47ish gearing.
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You're not saying your KTM 300 has 55hp, are you?
That's another thing weighing on my mind,,, is a KTM 2t... There's a cheap 360 here, but I can't find A THING for it... So I'm just thinking to get a more modern 250, 300 or 380. But then I hear as they go up in cc's they pull like tractors, and not so much top-end... So then I'm back to a CR
Fawk, I don't know...
That's another thing weighing on my mind,,, is a KTM 2t... There's a cheap 360 here, but I can't find A THING for it... So I'm just thinking to get a more modern 250, 300 or 380. But then I hear as they go up in cc's they pull like tractors, and not so much top-end... So then I'm back to a CR
Fawk, I don't know...
tbh i havent read the comments from the others but i can report you on our experience with a 380 in swiss supermotard championship (open class)
the most important thing i want to point out at the beginning: its all about the rider. DOT.
an endless amount of people have told us something like: 450s, 480s etc are faster in corners and have same power on the straight. so why using a two stroke.
i think most of them have never moved a 2stroke really fast and they just repeat things parrot-fashion. true to the motto: the champ rides a 450, so that MUST be the best bike
what our experience is (which can be evidenced by videos): we have at least same cornerspeed (but we ride the bike little different than the 4strokes e.g a slightly different line). and NO bike out-accelerates us, it is 100% the other way round. with the 380 you make meter after meter on every straight out of the corner. (with original 380 engine)
at the beginning of the season we had a pumped engine (14 HP more than standard) but due to technical problems we replaced the engine with the original 380 engine.
our rider is in his 2nd supermoto season (first season was with a pumped 450). he says that "he does not think that he can go faster with a any 4stroke".
we received 6th rank in the first race (40 competitors, very wet conditions). in the second race we received a 4th rank in run 1 (but crashed in run 2 and 3 - shot down by other riders...)
we are VERY happy with the result as we have 12 year old engine and BY FAR the lowest budget of the whole racers.
the bike is tire-saving and maintenance is low.
having questions? let me know..
i will edit this comment later to bring in some pictures or a vid maybe.
the most important thing i want to point out at the beginning: its all about the rider. DOT.
an endless amount of people have told us something like: 450s, 480s etc are faster in corners and have same power on the straight. so why using a two stroke.
i think most of them have never moved a 2stroke really fast and they just repeat things parrot-fashion. true to the motto: the champ rides a 450, so that MUST be the best bike
what our experience is (which can be evidenced by videos): we have at least same cornerspeed (but we ride the bike little different than the 4strokes e.g a slightly different line). and NO bike out-accelerates us, it is 100% the other way round. with the 380 you make meter after meter on every straight out of the corner. (with original 380 engine)
at the beginning of the season we had a pumped engine (14 HP more than standard) but due to technical problems we replaced the engine with the original 380 engine.
our rider is in his 2nd supermoto season (first season was with a pumped 450). he says that "he does not think that he can go faster with a any 4stroke".
we received 6th rank in the first race (40 competitors, very wet conditions). in the second race we received a 4th rank in run 1 (but crashed in run 2 and 3 - shot down by other riders...)
we are VERY happy with the result as we have 12 year old engine and BY FAR the lowest budget of the whole racers.
the bike is tire-saving and maintenance is low.
having questions? let me know..
i will edit this comment later to bring in some pictures or a vid maybe.
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I've seen figures of 52-58hp quoted, with several actual dyno run figures that fall within that range. While I haven't dyno'd my actual bike yet, I'd imagine it falls somewhere in there. The more I get into the bike, the more I realize that it isn't completely stock. Won't know exactly what has been done until I rebuild it in 2 months. So yeah, AROUND 55 hp isn't exactly a stretch. If you think it's less, that's fine by me, I don't really care.
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I would love a smoker class in STTARS!!!! that would be FUN!!
Stock 300 should be in the high 40s low 50s on an average dyno so I'd imagine you'll be close to what you're saying
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My 2cents... Can't stress enough about learning to ride the 2stroke. Practically every rider under 30 out there these days grew up on 4strokes, and knows how to ride them well. Throw them on a 2st, and they have to learn how to go fast on a completely new bike. Nothing works like it's "supposed" to. No progressive power build up, engine braking, etc. They have to adapt to the new machine. Given time, a fast rider capable of learning can certainly be competitive on a 2st... and will probably do it cheaper.
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all i can say is that after spending alot of time on a kx65, and cr85 motard i was able to get on my 250 four stroke and RIP straight away. backing it in and dragging pegs on my first session on a four stroke SM ever...
next year I am going to bring 2 bikes for the 250 class, my yz250 smoker, and the KTM 250f for tight technical, or very loose tracks.
next year I am going to bring 2 bikes for the 250 class, my yz250 smoker, and the KTM 250f for tight technical, or very loose tracks.
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(I just love posting this link... So much useful info here)
http://www.dirtrider.net/forums3/showthread.php?t=58057
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You do realize those numbers are from 1999, right? :lol: Apples to oranges dude, the 250/300 motor has undergone at least one major revision since then, and then another to the current models of today. And then yet another to the 2011 model, although it just was the transmission. (6 speed... makes me want to go buy one :thumbup:
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That's cuz my broke ass can only buy bikes that old:lol:
Yeah, I know... But all that info in one place. I would LOVE to see a list like that a lot newer and with a lot more bikes
I just haven't found one yet.
It gives me an idea of comparing bikes.
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Yeah you are right, it does give sort of a baseline. I would also love to see dyno runs from something somewhat current, like 05+. I saw an article on early 2000's 4 strokes, I think it was 2001 or 2002, and it had one graph with all runs on it.That's cuz my broke ass can only buy bikes that old:lol:
Yeah, I know... But all that info in one place. I would LOVE to see a list like that a lot newer and with a lot more bikes
I just haven't found one yet.
It gives me an idea of comparing bikes.
I'll be somewhere near Nashville on the night of the 9th if you want to ass dyno the 300. :Funny: Just let me know through PM.
Gerry
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what kinda range you get, and do you have an extended range tank on it?
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