Question about 1985 Yamaha FZ 750 FN (Europe)

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Not runing

I recently purchased a yamaha FZ 750 FN that needs work. It seems like the problem is only one of the two cylinders is firing. I checked the plugs (both are new) and the running side fires plenty hot and the bad side seems to make little to no spark. Replacing the rectifier was suggested to me, does that sound like a good place to start? Also what about a coil. It is a single coil with 2 plug wires so it seems like if it were the coil, it wouldn't fire at all. Thanks for the help.

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  • Anonymous Mar 18, 2014

    changed coils and both work new cdi box new stater and pick coil and rectifier.and still no fire on front cylinder.tested relay found one not working on ignition side all fuse;s are good help

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  • Master
  • 2,336 Answers

Switch plug wires and see if the dead cylinder starts firing --if it does you need new wires

Posted on Nov 10, 2008

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  • 132 Answers

SOURCE: What tipe MOTOR oil use yamaha 750 FZ, 1987 YEAR

a good 10w40 oil..if you dont know what type was used before then i would flush the engine then put the new oil in

Posted on Jun 19, 2009

6ya6ya
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Posted on Jan 02, 2017

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