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I currently obtained a 1977 Yamaha Chappy lb80 from my dad. it was sitting there for a long time and does not currently run. i took it to the shop this morning to have them get it running again. my question is this. after i get it back, is there anything that i can do get more power out of it? obviously keep a clean filter in it, but is there anything else that i can do besides boring out the cyliders? thank you in advance!!! sincerely, happy_chappy_owner p.s. I know these machines were not made for a lot of speed, but i would like to get a little extra "oomph" so to speak as i am right at 200 pounds.