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I have a '93 900 Superlight (same 900 SS engine) that literally overnight developed 2 symptoms: (1) While riding, when I close the throttle at a stoplight, the engine takes as long as 10 seconds to return to idle. (2) Although possibly unrelated, the engine backfires when the throttle is chopped on deceleration. Otherwise, the bike runs fine.
Assuming a problem in the fuel system, I removed, thoroughly cleaned & rebuilt the carbs (stock Mikunis) replacing all O-rings & gaskets. The carb slides appeared to move smoothly & the diaphrams seemed in good supple condition with no tears nor cracks.
After reassembling everything, the same problems exist. I would appreciate any thoughts. Thank you.
Assuming a problem in the fuel system, I removed, thoroughly cleaned & rebuilt the carbs (stock Mikunis) replacing all O-rings & gaskets. The carb slides appeared to move smoothly & the diaphrams seemed in good supple condition with no tears nor cracks.
After reassembling everything, the same problems exist. I would appreciate any thoughts. Thank you.