Join Date: Jan 2004
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Re: 1987 yamaha champ 100
Also check the gas inline filter (if it has one) and why type of gas he/she may have put in it. Who knows that type of gas they may have poured in. If pre-mix, check the oil mixture in your tank. Might be worth dumping and re-filling.
Also check its choke (auto or manual choke???) and the condition of its air filter. The air filter could be so plugged, its acting like the choke is on.
Also check it mufflter &/or Spark Arrestor. Many call these "a carbon & crud container". Ensure it isn't full of stuff and causing too much back pressure.
Hope these ideas help as well...