Question about 1981 Yamaha XJ 650

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I have a 1982 XJ750, and wont start. Once started runs well.

Same simptoms with mine.. First time i try starting it, it starts but runs very high on RPM, than drops and stalls. Than i cannot start anymore. If i use starter fluid, goes well and if does not stall, than i can get it running preaty well. If i keep it warm, starts like a charm. if cold, wont start again.
I have cleaned the carbs, i have sparks i have good compression.
????
Any sugestions

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Try to get a warmer spark plug and you may find that it will start better . the Yamaha have been hard to start and the only way to really start them up in winter or colder weather is to replace the plug by a warmer one . Do not go too hot as you may burn a hole in the pistons .

Posted on Sep 26, 2009

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