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I was wondering if anyone had a tip on why my 850 is backfiring and missing bad on the number one cylinder? (far left one if sitting on bike).that plug is black with carbon, the other three look normal.
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no advise-at all?
Maybe I have the wrong forum? -
Start simple and work towards more complex. First check the Spark plug boot and spark on a new plug. Is it oil or unburnt fuel on the plug? Wet and black is usually oil and dry with deposits is gasoline. Check fuel line for kinks. Remove any external fuel filters if any. Tap on the float bowl of the troubled cylinders carb and see if you can unstick a possible stuck float. Spray WD40 on the intake boot and see if your idle dives. There are so many different issues it could be without a little more info.1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
1985 GS1150ES stock with 85 Red E bodywork.
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boot
thank you sir, it appears to be the boot.
thankyou again.Comment
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