punkrock MX Posted October 8, 2005 Wow, just got an interesting phone call from someone at the annual AMA Congress up in Pickerington, Ohio. It appears that there’s a real chance for a “150cc” rule to be introduced for AMA Sports competition that would allow 125cc two-strokes to legally use overbore kits. Stay tuned—that could have a really interesting effect on the local Lites class. return of the 2-stroke just maybe.. Share this post Link to post Share on other sites
yzf mxer Posted October 8, 2005 no way dude four strokes are much better even if it is a 150cc whas up with allthe two stroke love on tt??? Share this post Link to post Share on other sites
redrider150f Posted October 8, 2005 no way dude four strokes are much better even if it is a 150cc whas up with allthe two stroke love on tt??? because they're better Share this post Link to post Share on other sites
CRFiddyRyder Posted October 8, 2005 There's no way a 250f will still be better than a 150 two stroke - maybe it will actually be fair now Share this post Link to post Share on other sites
Phile Posted October 8, 2005 Unfortunately 2-smokes are doomed because of air quality issues. It may be another 10 years or so but it is comming! Share this post Link to post Share on other sites
Cavi Posted October 8, 2005 agreedon the air issues. Also many people have gotten used to the power delivery of the 4 strokes, I think no matter what they are here for good Share this post Link to post Share on other sites
cryzrider Posted October 8, 2005 If they're better then why the double displacement difference and spare me the dribble of the amount of ignition firings. This should make it more sporting nonetheless. Craigus Maximus Share this post Link to post Share on other sites
jwriott Posted October 8, 2005 Interesting. FWIW, a 150cc 2-stroke should smoke a 250 thumper. Share this post Link to post Share on other sites
Jake155 Posted October 8, 2005 I doubt it, 4 strokes are way better then 2 strokes Share this post Link to post Share on other sites
MotoX178 My Ride Posted October 8, 2005 I would choose a 150cc 2-stroke over a 250 4-stroke. Hopefully this evens everything out. Share this post Link to post Share on other sites
punkrock MX Posted October 8, 2005 4-strokes are inferior to 2-strokes it is that stupid gas rule which has hampered the master race of combustion engine..the 2-stroke Share this post Link to post Share on other sites
Kev_XR My Rides (4) Posted October 8, 2005 Kawasaki is going to be pissed!!! Everyone gets to ride the Vet class bikes! Can you get to 150cc without stroking the crank? Overbores are relatively cheap. Stroking the crank isn't. Share this post Link to post Share on other sites
punkrock MX Posted October 8, 2005 Kawasaki is going to be pissed!!! Everyone gets to ride the Vet class bikes! Can you get to 150cc without stroking the crank? Overbores are relatively cheap. Stroking the crank isn't. Kawasaki still produces the KX125..it just isnt sold here in America anymore..not this year Share this post Link to post Share on other sites
jjgixxer Posted October 8, 2005 actually i was talking too a local pro they use too run big-bores in the 125 before the 250f came around not sure if it was legal or not but he said everyone did it Share this post Link to post Share on other sites
imlostagain Posted October 8, 2005 Kawasaki is going to be pissed!!! Everyone gets to ride the Vet class bikes! Can you get to 150cc without stroking the crank? Overbores are relatively cheap. Stroking the crank isn't. I installed a 144 cc kit in my '99 CR125 .....it was simply an overbore/ replated cylinder . The bike absolutely ripped !! Share this post Link to post Share on other sites
Edge316 Posted October 8, 2005 You guys that claim 4strokes are so much better woudn't be singing the same song if the a.m.a had made the displacement rules more fair.It took doubling the displacement of the 4strokes to make them competitive with the 2strokes.I like the 4strokes ,but I still prefer the 250 2stroke.I think the a.ma should allow bigger bore 2strokes in both the 125 and 250 classes. Share this post Link to post Share on other sites
yzf mxer Posted October 8, 2005 two strokes just dont have what it takes in the 5 years four strokes will be so much more developed and the two stroke fans on year will all be on the four strokes simply cuz two strokes just cant run with the four strokes Share this post Link to post Share on other sites
x2468 Posted October 8, 2005 i know that dirtbike bored out a yz125 to 144cc and the result was them screaming by 4-strokes, uphill, with a heavier rider..... so if the ama allows 150cc 2-strokes, the 4-strokes are dead. What would be funny would be if the AMA suddenly made the same displacement rules for both 2-strokes and 4-strokes. what if 250cc 4-strokes had to compete with 250cc 2-strokes. i wonder how long 4-strokes would take to adapt. they would probably end up so high strung looking for top end power they'd just end up with 2-stroke powerbands. kinda like todays 600cc crotch rockets. 17,500rpm R6...... thats nuts. Share this post Link to post Share on other sites
cr85racer12 Posted October 8, 2005 You gotta admit, when you bore a 125 into a 150 theyres a huge difference. Displacement is a huge thing, if 150 2 smokes were competing 250 four strokes. I think that if 150s came out of the factory like that there would be a huge turn back to 2 strokes. Emisssions is the biggest problem, but I'm sure that if the 2-strokes were making that much of a turn around, they'd find a way to get around the emissions. Share this post Link to post Share on other sites
