Honda PC50 Moped 4 stroke engine

Welcome to the forum Roger glad you joined us.

Welcome to the forum!
You might want to check out mopedarmy. They most likely have alot of the info that you seek. Moped Army - Swarm and Destroy
Good luck with your build!

Howdy Rodger, you could use a aftermarket hi-compression piston like a wiseco , a larger carb ,and a nice expansion chamber pipe to boost the ponies , all of that is just bolt on and doesn't require much fuss or mechanical ability ...i have seen several mopeds built up to race this way , and a few fellows from a motorcycle magazine even built 50 cc mopeds and raced them from new york to LA 3000 + miles and they made it , so it seems like a pretty reliable build to do to a moped ...i think their mopeds topped out at about 45 MPH built this way

I agree with everything moonshiner said except the expansion chamber exhaust pipe.
They don't do diddly for 4-stroke performance gains.

GearNut said:

I agree with everything moonshiner said except the expansion chamber exhaust pipe.
They don't do diddly for 4-stroke performance gains.

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my bad for some reason i was thinking the little Honda was a 2 stroke , they make a 4 stroke performance pipe as well ...