A lor of us with '02 CR250s are in love with the bike but a little less than happy with the motor, so we have been sharing different ideas and reviewing aftermarket stuff. While I am definitely not a performance guru (there are some of the best on this site) I have been able to ride several differnt set-ups back to back. These are my impressions so far,(I'm a mid pack 40+ mxer and a decent desert guy). So here goes (canvet, hope this helps)
Stock: smooth fun controlable, but not impressive on the mx track or sand washes.
1st step Procircuit pipe and shorty silencer: woke the bike up on the track and much better at "planing out" (getting the front wheel out of the drag) in the sand, pulls harder out of turns but still required clutch slippage to get a good launch or to do technical trails.
second step; head milled ten thousandths. much better response off the bottom, big gains in low and mid power, I feel like it revs better too, but this may be just because it gets to the upper range quicker. I would recommend this mod highly, especially if you live at altitude.(here about 5600 ft.).
So far I have stayed with the stock reed setup but I have ridden two bikes with my same pipe,head and jetting, and my seat of the patns impression was this; V-force, more hit more mid, better top, still clean down low but I am thinking of this setup for MX. Boyesen power reeds, more low end, smoother less hit, good single track setup but not a huge difference. Boyesen super stock reeds, I couldnt tell any real big difference, it felt a little more responsive off road, couldnt feel much difference at the track.
I also rode my buddy's '02 with the same head mod and an fmf Gnarly pipe and S/A combo. His is smoother than mine off the bottom, more down low, but seem to me to fall off the power quicker than mine does. I won't say it's slower than mine cause I can't catch him off road, but it feels sluggish to me now.
For me the biggest differences I felt (in order) were !. pipe and silncer 2. head mod, 3 reed setup. I don't know anyone with a Doma so no impression there, and the guy I know with an fmf fatty, wadded up his bike and body trying a huge step up (across a two lane road!) and his bike is unavailable for testing, he said he was a little disappointed with the pipe but didn't get specific.
Good luck and let me know whats working!
:aj:
Stock: smooth fun controlable, but not impressive on the mx track or sand washes.
1st step Procircuit pipe and shorty silencer: woke the bike up on the track and much better at "planing out" (getting the front wheel out of the drag) in the sand, pulls harder out of turns but still required clutch slippage to get a good launch or to do technical trails.
second step; head milled ten thousandths. much better response off the bottom, big gains in low and mid power, I feel like it revs better too, but this may be just because it gets to the upper range quicker. I would recommend this mod highly, especially if you live at altitude.(here about 5600 ft.).
So far I have stayed with the stock reed setup but I have ridden two bikes with my same pipe,head and jetting, and my seat of the patns impression was this; V-force, more hit more mid, better top, still clean down low but I am thinking of this setup for MX. Boyesen power reeds, more low end, smoother less hit, good single track setup but not a huge difference. Boyesen super stock reeds, I couldnt tell any real big difference, it felt a little more responsive off road, couldnt feel much difference at the track.
I also rode my buddy's '02 with the same head mod and an fmf Gnarly pipe and S/A combo. His is smoother than mine off the bottom, more down low, but seem to me to fall off the power quicker than mine does. I won't say it's slower than mine cause I can't catch him off road, but it feels sluggish to me now.
For me the biggest differences I felt (in order) were !. pipe and silncer 2. head mod, 3 reed setup. I don't know anyone with a Doma so no impression there, and the guy I know with an fmf fatty, wadded up his bike and body trying a huge step up (across a two lane road!) and his bike is unavailable for testing, he said he was a little disappointed with the pipe but didn't get specific.
Good luck and let me know whats working!
:aj:
