My engine is running poorly: Difference between revisions
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If the engine is just popping a little bit as you decelerate, then you're getting preignition. This is caused by a lean mixture condition. Check carbs for vacuum leaks, or richen (raise) the needles or idle mixture (turn out screws). | If the engine is just popping a little bit as you decelerate, then you're getting preignition. This is caused by a lean mixture condition. Check carbs for vacuum leaks, or richen (raise) the needles or idle mixture (turn out screws). | ||
If the bike is seriously backfiring, then you might still have a lean condition, or maybe even a rich condition (check your choke). This is because a lean mixture can make the engine miss, then the unburnt gasses are ignited in the exhaust pipe on the next cycle; a rich mixture can have the same effect since unburned fuel will also be present | If the bike is seriously backfiring, then you might still have a lean condition, or maybe even a rich condition (check your choke). This is because a lean mixture can make the engine miss, then the unburnt gasses are ignited in the exhaust pipe on the next cycle; a rich mixture can have the same effect since unburned fuel will also be present. | ||
Check pilot circuits in the carbs, change the spark plugs (make sure to gap them properly), check for exhaust leaks | Check pilot circuits in the carbs, change the spark plugs (make sure to gap them properly), check for exhaust leaks. | ||
====My bike will run for a while, but keeps losing power and dying when I ride it.==== | ====My bike will run for a while, but keeps losing power and dying when I ride it.==== | ||