Originally Posted by
roadrunner ss
my racer 2 is a one speed i do not have no pinion gear yet im looking to found out what pinion gear should i start of with
So start with the stock one and see how it runs. Maybe get an extra one or two that each is up one tooth and try those. At some point the engine will run too slow to get on the pipe and you'll hear the engine running labored and probably too hot.