2002 919, original owner. All parts oem
Bike sat for a year with gas in the tank. After replacing the battery the bike's fuel pump failed. Replaced entire fuel pump assembly (including fuel filter). After which the bike started but had smoke and gas coming out of the exhaust pipes and gas in engine oil (did not drive it during this). Determined fuel pressure regulator had failed. Replaced the FPR, spark plugs, changed oil and filter twice. Bike ran better, but when rpms are low (and I am in a higher gear, as if you are trying to lug the engine) and you give full throttle (esp going up a incline) bike seems to be hesitating or misfiring just briefly. Tried fuel injector cleaner and driving it hard, no effect. I checked compression which was in spec. I replaced the fuel injectors, but problem remains. Took it to the dealer, $300 dollars later they found that the ecu had a grounding short to the air intake flapper. I replaced the ECU, to no avail. I didn't really drive it that much before or in that manner but I dont think this was present before (does anyone else experience this?) any thoughts would be greatly appriciated as I am at a loss.