I have a well modified TB with cylinder porting, milled head, bored carb and a wiseco. I can spin the tires in loose spots but I've never had a good wheelie from the machine. I have my clutching set so that it will engage with low throttle so it is easily on the trails. I had it setup with all hotseat speed kit parts but it engaged way to high. As of now I can pull the wheels 2"-3" off the ground from a dead start.

 

talonhawk
what should the spring/helix be set at? There is definately something wrong with it. Its jetted for the altitude here, but Im moving to the CA coast next week so the jetting will have to change again. I took a compression check and it hit 105lbs consistantly, so the compression does not seem to be an issue, plus the thing runs great. As for the gearing it has the stock gears it came with, I bought it new, so whatever the combo is for 00 its still the same. Also, the pipe and clutch I bought from HPD, so its a mystery.
PD

 

If it is a HPD agressive clutch kit the holes should be set on #3 in the moveable sheave,#2 in the healix and push down on healix and move the moveable sheave counterclokwise about 1/4 to 1/8 turn and push down.That is the correct setting.

 

I can't say what your kit specifies but the stock setting for a
TB is #2 hole in the helix and the #2 hole in the sheave. These
postions probably aren't as much of a low end power problem as
the spring preload setting could be. Make sure that you have
rotated the moveable sheave 1/4 to 1/3 turn counter clock wise
to preload the secondary spring before pushing the helix onto
the spline.