To smooth the power and make it easier to use, you can try a CCK needle
in the carb- so easy and cheap to try. Eliminates the 1/4 -3/8 throttle
mini-hit.
Also, I can personally recommend the RB Designs head mod, VERY noticible
low end improvement.
A 10 or 12 oz. flywheel was tried and I really liked it, too.
Jeff
-01 300 XC with head mod, big ignition, LTR power valve cover
(going to try a 35mm carb- we'll keep you posted, as I want
what you want, too)