2000 CR250r Low end power
Posted 19 October 2009 - 08:48 AM
[COLOR=black]I’m new to this forum, just picked up a 2000 CR250r, my first two stroke. [/COLOR]
[COLOR=black]The bike runs great, it screams up top, it hits very hard. But I’m getting tired faster trying to hang on when the power hits. Coming from four strokes, I know it will never have the same low end, but I'm willing to sacrifice some of the top end to get back a little low end. The bike already has an FMF Gnarly pipe, and a Boysen power valve cover, I know both are suppose to help low end. The previous owner told me it had a Pro Circuit cylinder head, will swapping out to a stock one bring back the low end power? Any other suggestions? [/COLOR]
[COLOR=black]Being new to two stokes, I’m not quite sure where to start. [/COLOR]
Posted 19 October 2009 - 09:58 AM
Posted 19 October 2009 - 07:53 PM
Posted 19 October 2009 - 08:23 PM
Posted 20 October 2009 - 02:23 AM
This certainly made riding the bike much easier and less tiring.
Posted 20 October 2009 - 06:20 AM
Posted 20 October 2009 - 08:07 PM
Oh, and check the exhaust valve. take off the 17mm bolt/cover on the left side of cylinder. it sould point to the L until mid rpms then rotate to the H.
Posted 20 October 2009 - 10:55 PM
check squish, maybe bump compression at same time
Boyeson Pro Series 2 stage carbon reeds
spacer on reed cage
swap in cylinder from a '99, or have your ported for low end
Posted 24 October 2009 - 01:52 PM
Posted 24 October 2009 - 02:50 PM
Posted 24 October 2009 - 05:26 PM
If you ever get a chance to try a stock pipe, do it. I think the power is way smoother than a FMF Gnarly pipe on the '00 CR250. Also, +1 on the flywheel weight suggestion.
Posted 24 November 2009 - 08:29 AM
I took the right side case cover off and found the rack was not installed correctly with the pinion. It took me 30min just to clean off the orange RTV that was caked on everywhere. Put it back together with fresh gaskets, adjusted the valve so it had spring tension on it.
As soon as I got to the end of the street and ripped on it I knew it was fixed, finally. It’s like riding a different bike. I took my 5 year old daughter out riding the next day and was able to lug it and go slow with her, would have been impossible before. It will almost idle up short steep hills now. Thanks for all the suggestions, there's a wealth of info here.