Question about 1991 Yamaha FZR 600
Engine turns but doesnt start plugs are getting spark tank was empty when i got it.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? (not all bikes have a water trap bowl). Install an in-line fuel filter. Use premium gas. You will need to clean the built up varnish from the evaporated gas out of the carbs.
FOR EACH CARB > Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.
I strongly suggest you to let the shop take care of the carbs. Cleaning can be a nightmare times four and doing the balancing and sync of the carbs sounds easier than it is. If you do the carb work yourself, then be sure you have a fire extinguisher at hand. I am serious about that.
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Posted on Apr 23, 2009
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Posted on Jan 02, 2017
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