Do you have a fiddle stick?
If so you can keep the spring tension the same as the comm get's smaller by slightly bending the spring and measuring with the fiddle stick.
If not go to teambrood.com and order one asap. It's one of the most usefull tools in motor tuning.
Originally Posted by mister yellow
hi i have a roara x brood , when i rebuild it and the comgets smaller do i have to use the same springs or go harder?
sorry for the bad english i am from belgium (europe)
brood engins go damm fast.
Retired from sponsored racing, Now just having fun.