28-02-14, 03:24 AM
Well from what you have said about the bike being stored outside through the winter I would edge my bets towards wet/dampness in the electrics. I would personally start by removing as much of the bodywork as required to allow you better access to the wiring loom and go through it systematically, cleaning the block connectors and spraying them with a good contact cleaner and then water dispersant like GT85 or ACF50. You could also trim a couple of mm from the HT leads and screw them back into the plug caps, again with a good dose of GT85 within the caps. New plugs may even be worthwhile even though they aren't that old.
To carry out these checks and ensure the wiring loom is free from dampness is a useful bit of motorcycle maintenance that certainly won't hurt and it's also very inexpensive. Even if it doesn't cure your issues at least you will know the electrics are well protected. Also, if you have had the fuel tank off, make sure that the 2 breather pipes haven't been kinked or trapped when putting it back on. The breather pipes are the 2 thinner rubber pipes that connect at the rear of the tank near to the main fuel pipe. When these pipes get kinked it can certainly cause rough running.
Good luck with it and let us know how you get on.
To carry out these checks and ensure the wiring loom is free from dampness is a useful bit of motorcycle maintenance that certainly won't hurt and it's also very inexpensive. Even if it doesn't cure your issues at least you will know the electrics are well protected. Also, if you have had the fuel tank off, make sure that the 2 breather pipes haven't been kinked or trapped when putting it back on. The breather pipes are the 2 thinner rubber pipes that connect at the rear of the tank near to the main fuel pipe. When these pipes get kinked it can certainly cause rough running.
Good luck with it and let us know how you get on.
Yamaha Fazer 'the only bike you'll ever need' maybe ???