Quote:
with proper tuning, exhaust, intake
and a better carburetor,
i can gain about 15horse at flywheel..?
More like 7 or 8 hp. You will feel it when you rev the engine up to 4,000 -5,000 rpm. If you drive between 2,000-3,000 it may sound louder, but won't be any faster. The larger carb mainly helps at high RPM.