New user here. Hello! Excuse my bad english…
I bought my VF1000F 84´ 8 years ago. Since then it rests in my garage. Has 12k miles on the clock.
I decided to bring the bike back to the road last year (december). Because it´s in good condition, I thought its an easy job; unfortunately not.
Last year I checked everything; changed all wear parts, compression, checked valve timing and lash, the wiring harness for bad connections (alternator plug was lighty grilled), cleaned the carbs and the tank. So, it starts right on first try at the time and runs good. That was five month ago…
So, yesterday I filled the tank, installed the new, fully charged battery and… nothing except a very weak starter turning the engine very slow. WTH?
Ok, I had an RC36 starter siting around, easy enough to change; 15 minutes later a push on the starter turns the engine now fast enough. Jobs done - not.
One ear-shredering BOOM! Massive exhaust misfire.
Roughly 1 sec after releasing the starter-buttom, it misfires in to the exhaust; There is no signs of combustion while cranking. I can smell fuel out of the exhaust. Only misfires as describded after releasing the starter buttom.
I pulled the plugs, checked for spark. There is spark on all cylinders. And it sparks once at the same time on all cylinders short after releasing the starter buttom and the fuel pump turns for one ignition event.
I don´t think thats correct. I pulled the clutch cover and all looks good. Ignition pickups are in place with correct gap and wiring should be ok. Wiring to the ignition-units are fine. Grounds are ok and cleaned.
I have done nothing to the bike in these five month…mysterious.
What can that be?