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Unless you know what you are doing I would skip the P&P. Do you have flow bench, and how much additional flow and subsequent hp do you think can acheive with a P&P?

I'm into vintage 2-stroke street bikes and a typical way increase hp here is to port cylinders and match port intakes and carburators and some will go so far as to polish their intakes and exhaust ports. Actual dyno testing in these applictions indicates that the best bang for the buck is port matching the carbs to the intakes and exhaust to the muffler flange. Polishing, while looking and sounding cool had no appraciable performance enhancement. All that being said I have never been inside an Ody motor nor do I plan to be.

All motors are in essene a large air pump. IMO you would need to improve the entire air delivery and exhaust circuits to see any appreciable performance improvements. But let us know how you fair if you break out the die grinder and polishing wheels.
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