| Crank sensor or wiring to it would be my guess, does the missfire only happen when the bike is warm? If so it may be worth getting hold of a can of freezer spray and cooling the crank sensor (with the bike warm and running) to see if the missfire stops or changes in anyway. Had an 3 litre Alfa years back that went through quite a few crank sensors and the freezer spray worked in diagnosing the problem. Worth a try anyway? |