what to buy bigger sprockets at?
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I think you also have the 420 chain. They are common on that style.
The removal of the emission valve will not really make a big increase in performance. Some of them have a vacuum line to recirculate the exhaust. You can just block off that vacuum port on the intake.
If you are going to increase the sprocket size, you will increase the engine RPMs. If you haven't upgraded the CDI/coil I would. A better carb will help also. I would use an intake and carb at 22mm.
The removal of the emission valve will not really make a big increase in performance. Some of them have a vacuum line to recirculate the exhaust. You can just block off that vacuum port on the intake.
If you are going to increase the sprocket size, you will increase the engine RPMs. If you haven't upgraded the CDI/coil I would. A better carb will help also. I would use an intake and carb at 22mm.
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