Quote:
Originally Posted by pete
Just as a matter of intrest... power wise..
The Honda CRF150f... with a 175 bore kit,
cam , HD valve springs gives another 3.5hp..
the standard Honda sleeve is just bored for
the 175cc piston... So if these chinese motor
use the same thickness sleeve as Honda being a copy
it may well be just a bore job..
after all the crf150 is a 26cc increass & the Chinese bike
is less at 21cc..
http://www.mx-performance.com/id40.html
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Yes, that's right. The 250cc bore is only 3mm bigger. 1/8th of an inch....ARH