if you really look into it there is no right heavier or lighter. it all depends on the clutchspring/shoe spring combination you have that will determine the G's you need to run. You wanna try to use the lowest clutch/shoe spring combination you can without belt slippage. I don't follow that rule cause I am big and have a honda that is aircooled stroked. That being the motor was not made for that kind oc cc's and can tend to overheat unlike the minarelli based non stroked motor you are reffering to which has a better scacenging system. I run 20% over stock with about 50grams total but am compensating with torque cause I don't rev as high. Maybe 10,000. Other water cooled strokers or just 72cc motors can be built to rev 12,000+ no problem. They would run the 15% and alot lower grams. but they are alot smaller than i am and have a better cooling system for their motors.
i just got a 63cc bore kit and a high speed pully kit
i got 3 sets of rollers
1 -not sure came with pully kit
2- three 6's and three 9's
3- a set of 5's
i have #2 in mine right now and i gave #1 to my step dad for his
so my question is should i have set 2 or 3 in mine?
"Its not what you ride, its that you ride"
1996--------Honda Elite S-
1991--------Tomos Targa-
And a Bunch of other bikes.
Before you guys get into weights what is the gear ratio? let me guess stock carb & no gear ratio change! if you want to build speed then learn how to do it