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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
2002CR125 dyno charts are up in the members area
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[QUOTE="marcusgunby, post: 321306, member: 17066"] Forgot to mention a few points 1 timing, i tried full advance and retarded.Advance gave more power up until near peak and then it went off.Overrev was much less.Good for supercross.Full retard was good near peak(highest peak) but actually has worse overrev.Std timing was best overall. 2Jetting one step richer on the main produced better power from mid upwards but lost overrev.One step leaner was poor until peak then held on better for more overrev. Left it rich as i liked the better midrange. Tried the head with less squish clearance-was 1.1mm reduced it to 1mm , it had very little difference at all even though you could feel the extra compression on the kick start. The engine with the larger 01 type exhaust manifold had no extra top end or overrev.In fact with the head mods,cometic gasket and exhaust manifold i had less power and less overrev.No more bottom end either.Im going to try to lower the cylinder 0.5mm next. Also the transfers are 1mm higher one side than the other-this cannot be good. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
2002CR125 dyno charts are up in the members area
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