Question about 1991 Suzuki GSX-R 750 M
1)You have two coils servicing four spark plugs. This is called the wasted spark system because the spark plug fires on the compression and exhaust stroke. Therefore on one of the coils , one spark plug is firing and the other is fouled. I would guess that you have a bad spark plug cap on that cylinder(about $25). Replace the spark plug cap and the spark plug and your problem should be solved.
2) You have low compression on that cylinder and need a rebuild.you may want to pull the plug and do a compression test.
Posted on Sep 10, 2010
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Posted on Jan 02, 2017
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