Sonreir said:The transmission from an SL125 will swap in.
5th gear ratio for that bike is .815 which is taller than your current setup and 1st gear is 2.769, which is shorter.
iatethepeach said:Thanks for pointing this out. Compression is 130 psi. I haven't adjusted the tappets- I don't know what change to expect on a motor with only 5K miles, but I suppose I should do that first, then test compression again. Do all other options involve removing the head?
I'll try this but I may wait until after I get the basics sorted out- thanks.
iatethepeach said:I'm not hoping to drag race Justin Beiber with it.
iatethepeach said:A six-speed (or wider-ratio five) would allow for a lower 1st without affecting the top-gear ratio. Or a taller top-gear without lowering 1st. Or a lower first and a taller top-gear. The penalty of extra shifts is OK by me.
DohcBikes said:Play with the timing too much on this engine and it WILL make you pay. Set it to factory and accept your 5hp.
DohcBikes said:accept your 5hp.
barnett468 said:Do NOT accept your measly 5 horsepower . . I can get you at least 12 with your current compression.
iatethepeach said:Ha ha, that'd be pretty sweet. Right now the power output is just fine, whatever it is, but it'd be fun to play around with.