- Dirt bike & ATV parts


Older bikes as fast as the new bikes ?

May 3, 2002
YZ__rider said:

Seems hard to believe, but this website claims 40 hp on a RM 125, although I have to question the legitimacy of the source.
yeah sales brochures never lie! :rotfl:

37-42hp was typical in a cr250 from the production rule until the reed valve motors. Now that is a 250. the 125 was down about 10hp and about 3/4 the torque!

The 02-07 cr250s are dyno kings, but that related to a pro only powerband on the track and you hear the complaint "weak bottom end". But sweet top end that tore up the dyno numbers. I have a 02cr125. has plenty of top end for sure, but NO torque down low. Even the cart motors are great up top, fall off the pipe and less than 1/2 throttle and you will hit the WHaaaaaaaaaaaaaaaaaaaaaaaa bog city!

Point being, what is printed is not always acurate. HP is not the biggest factor. you can have more HP and still have a crappy motor for the masses. Also torque is just as important as HP, thus the 4stroke bikes!
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