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got spark fuel n comp ck'd evrythinng all good but?

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06 drz s model was running But it only back fires now ? All electronics ck good newer FCr 399mm running good then it just stopped running we replaced the stator got new battery everything setup good it only backfires any ideas mahalo from south point Hawaii. its as far south as u can go without a passport lots of lava lol its true lol

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Yeah .. make sure the stator is wired correctly , some new units can be wired wrong at the pick up coil . Make sure you have fuel flow and a clean fuel supply and correct jetting and fuel screw tuning . A clean air filter is best , check the valve clearances and cam chain tension .

Focus on a good spark first

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