Question about 2003 ATK 125 4-stroke

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Backfiring atomik 125cc running rough.

The bike will not idle and when i try to put the throttle on it cuts out. so i back off and the power cuts back in only to find the bike backfiring. cannot work out how to get it to run smoothly. can anybody help?

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What octane gas are you using? If octane is to high even with mixed fuel it will cause valves to burn out run to rich....try using lower octane gas, if not you need to adjust fuel mixure...only ned a small screwdriver for this....but try the fuel first...

Posted on Jun 22, 2009

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