March 2, 201214 yr Sherco 2011 290 When the bike is started it runs ok on idle, but when applying power the bike backfires and there seems to be a spark at the back of the engine manifold, then cuts out... I've checked the wires and there docent seam to be a short anywhere... Any ideas please its got me beat.. Thanks Sean
March 3, 201214 yr Sherco 2011 290 When the bike is started it runs ok on idle, but when applying power the bike backfires and there seems to be a spark at the back of the engine manifold, then cuts out... I've checked the wires and there docent seam to be a short anywhere... Any ideas please its got me beat.. Thanks Sean Uh, good one? Change the sparkie first, Spark from where? Insure the earths undr the tank are good clean and tight.
March 3, 201214 yr Author Thanks, the spark appears on the engine near were the rubber manifold cornets to the engin, I've checked all the wiring and earths,, I'll changed the spark plug , I'll let you know,, thanks
March 7, 201214 yr If the flywheel key shears, the Ign Timing may only change slightly which can cause symptoms similar to what you discribe.
March 7, 201214 yr Any progress... used to be that misfires under load pointed towards HT problems..... i.e anything after the CDI/coil..HT coil....lead.... plug
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