I just had the top & bottom rebuilt.
Just to test the spark output, I held on to the plug and grounded it to the engine. The spark was weak compared to my 98' KDX220R. On my KDX I could not hang on to the plug without being jolted. I checked all wire connections for corrosion. Maybe I need a new ignition coil or a boost kit?
Maybe this is the problem people are having with jetting, it could be a weak spark. A weak spark would cause the bike to run on a smaller size jet, since a stronger spark would be needed to ignite a richer fuel mixture.
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