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latoya
latoya Posted on Jul 13, 2012
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How do i change my spark plug

Top gear is reached in a matter of minutes. kickstarting is real hard backfiring

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bazzz7071

bazzz7071

  • 342 Answers
  • Posted on May 26, 2010

SOURCE: yz 125 2001 model.

Sounds like the piston seized.
Pull the spark plug and hand crank the engine if the piston moves up and down with little effort your ok but if you have a lot of resistance top end rebuild needed.

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Anonymous

  • 2050 Answers
  • Posted on Mar 31, 2011

SOURCE: My yamaha pw 80 won't kickstart and can you tell

I'm assuming you mean gas comes out the spark plug hole with the plug removed??? You probably have a gummed up carburator, due to old gas or dirt. Make sure your air filter is clean first, and then get your carburator thoroughly cleaned. If your float is sticking, or the float needle is dirty or worn out, it will keep dumping fuel to the engine.

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Sounds like the piston seized.
Pull the spark plug and hand crank the engine if the piston moves up and down with little effort your ok but if you have a lot of resistance top end rebuild needed.

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May 26, 2010 • 2003 Yamaha YZ 125
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