For the 2-smoke riders (Honda mainly)

[cheese]

I wonder if that is because Honda went to a single ring set up after 04. I find my 04 had heaps of bottom end and Gr81 said it was like a 4 stroke!

Each to their own at the end of the day.

[Danger]

Other things that you can look at for more bottom end is fitting a reed spacer if yours does not already have one and if there is a washer like gasket between the pipe and the cylinder you can add a couple more.
Also retarding the timing slightly for smoother hook up is always a good idea for off road use.

[cheese]

yeah that littel gasket on mine fucked out and I replaced it and it had heaps more power. My poor old bike needs some TLC after Tarawera.

[B0000M]

the single ring and redisigned exaust port / housing in 05 was aparently to improve bottom end.

on that note, 2 more people i know bought 05 CR250s yesterday having ridden a variety of modern bikes to see what they liked.

also got my trailer modded yesterday, so i can fit 6 bikes in my rig as well as 6 people now lol

[mxracer_nz]

Dont even bother with a pipe they usually make next to no difference. The cr250`s go really good stock, ive had 1 dyno`d with stock system then put a pro circuit pipe+muffler and vortex reed bolck and it was .3 horse more, felt no different on the track usually they just louder so you think its faster

[Pierce]

Dont even bother with a pipe they usually make next to no difference. The cr250`s go really good stock, ive had 1 dyno`d with stock system then put a pro circuit pipe+muffler and vortex reed bolck and it was .3 horse more, felt no different on the track usually they just louder so you think its faster

I guess it really depends on which pipes you're looking at. I've since riden a couple of RM's, one stock and one with the gnarly and the one with the gnarly makes a huge difference with the bottom/mid end.

[Danger]

Same it depends on the pipe. My Bills pipe makes my RM a lot easier to ride with a biggger power spread.

[B0000M]

fmf fattys make a cr250 heaps quicker than stock

[NordieBoy]

fmf fattys make a cr250 heaps quicker than stock

Quicker as in top speed or quicker as in around the track?

[B0000M]

Quicker as in top speed or quicker as in around the track?

quicker as in significantly more power throughout the rev range, but particularly in the lower rev range, factory they lack a bit of low down, with the fatty thy are awesome. top speed id say would be unaffected