Question about 1987 Yamaha FZ 750 MG (Europe-US)

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Hi my fzr 750 throws a plug dead every 700 km

Bike is tuned +dino throw a spark plug dead every 700 km every time a different plug. help please

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  • bazzz7071
    bazzz7071 Oct 30, 2012

    Hello when you remove the plug what does it look like? 

  • harry Oct 30, 2012

    Hello. When i remove them they are black and moist.If i change that plug only the bike still not run properly, but when i change all 4 it is hundred persent again.


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Try and find some iridium plugs or other high performance plugs. Sounds like the plugs you are using just dont agree with the motor's performance output

Posted on Oct 30, 2012

  • harry Oct 30, 2012

    the very first plugs i put in was iridiums they lasted one week after it was dino tuned.


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Posted on Jan 02, 2017

  • 8404 Answers

SOURCE: have a 07 700 grizzly the battery keeps going dead

something is on ... somewhere.

That OR you arent charging.

Disconnect the battery put a amp meter between the + and the + wire. What is the reading? Anything above zero is a drain on your battery. Turn on the ignition ... what happened ... more drain?

Check your diodes in the rectifier to assure you arent loosing power to ground there because one is shorted.

Need more help, let me know ...



Posted on Oct 13, 2009

  • 338 Answers

SOURCE: i have a 1986 yamaha virago 700 that wont run properly

2 things need to be done first start your bike get a can of wd40 after your bike is warm and running spray around the carb jointsall 4 of them if your engine changes rpms up or down you have a intake leak ether your carb joint gaskets or o-rings need replacing or your carb joints are old and need replacing. at this point wont hurt to have you carbs cleaned also

Posted on May 03, 2010

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