Question about 1991 Yamaha FZR 600

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Yamaha FZR600 1991 - Spark plugs fire but bike doesn't start

I have a Yamaha FZR600 1991 and it recently had a check up at the mechanic, so the bike should be in sound condition. I just got it back and yesterday it drove just fine. This morning the spark plugs fired but the bike wouldn't start. I accidently left the fuel valve on ON over night. Could this be the reason or would you have any other idea?

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Question . when you say the spark plugs fired , do you mean that you took them out to check ?? or do you mean that you heard the engine crank over.Either way if your fuel tap is faulty,you have more than likely dumped a hell of a lot of fuel in your donk.Blow compressed air around spark plug holes to remove grit,remove all the plugs,put them back in their caps and ground them to the engine away from the spark plug holes in the cylinder head,Crank it over for a while,not too long,reinstall plugs and crank it over.It should be a goer.All the best luck liesel...Tabby.

Posted on Oct 08, 2009

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No, i leave mine on all the time! unless you have a sticking float ...that might let fuel creep into the cylinder over night and cause flooding...turn kill switch off, choke closed, throttle open full max, then crank for ten seconds then let set for about a minute to let starter cool down then see if it starts. if that doesn't work then try to push start it..if that doesnt work then take it back to the repair shop.

Posted on Oct 08, 2009

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