Question about 1982 Honda FT 500

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When I am riding in any gear at around 5k rpms and roll off the throttle my bike misfires. Is this a timing issue? Is there a way to adjust it other than the screw on the bottom of the carb?

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Your problem hopefully is simple to fix. Put the motor to top dead center on the compression stroke. Check the valve tolerances , make sure the exhaust is not too tight.
cold IN 0.10 mm (.004")
EX 0.10 mm (.004")
Also replace the spark plug cap and the spark plug. Some times popping or backfiring is caused by leaking exhaust gaskets from the head to the head pipe and some times the gasket between the head pipe and the muffler. If the valve adjustment, plug, and plug cap do not work, try the exhaust gaskets.

Posted on Sep 07, 2010


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