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83 650 gl

angus

Forum Mentor
What NGK plugs fit the 83 650gl.There was D8EA in it when I bought it put same in and starting to misfire and run poorly.Got NGK catalogue and says DR8ES-L which is correct.
 
The answer can be found on page 2-10 of the factory Suzuki service manual for your bike...

http://zeus.mtsac.edu/~cliff/storage/gs/GS650GManual.pdf

gs650 spark plugs.jpg

FWIW: the D8EA is a smaller diameter plug than the more common D8ES. Rule of thumb is all the 2V/cylinder GS bikes, excepting for the 650, use the D8ES, whereas the 4V/cylinder bikes used the smaller D8EA plugs.

R plugs, which stands for resistor, are not ideal since the plug cap already has a resistor. Generally speaking they won't hurt anything though.
 
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What NGK plugs fit the 83 650gl.There was D8EA in it when I bought it put same in and starting to misfire and run poorly.Got NGK catalogue and says DR8ES-L which is correct.

Same plug as my 79 750 used, NGK D8EA
 
What NGK plugs fit the 83 650gl.There was D8EA in it when I bought it put same in and starting to misfire and run poorly.Got NGK catalogue and says DR8ES-L which is correct.

That would be NGK D8EA
 
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