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Old 08-31-2015, 11:16 AM
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LongboardMalinois LongboardMalinois is offline
Motorized Bicycle Elite Member
Join Date: Jul 2015
Location: Santa Barbara, CA
Posts: 124
Default Re: Still getting really bad gas mileage.

Originally Posted by Davezilla View Post
If the spark plug is showing lean or normal it could be a miss at full throttle due to the poor quality stock plug.
I would recommend switching to a good plug and setting the gap to .024 to .026" and see how it runs before putting a leaner jet in the carb.
Yes, the spark pug shows very lean, the porcelain insulator is grayish colored and the metal around it is dark brown, but i think that this is just from use. Should i lower the clip on the carb needle a notch? Right now i have it at the second notch from the top.
My motorized bicycle is cooler than your Vespa, even though you can go faster.
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