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After fouling a plug at 1000 miles I installed new BPR9ES plugs. I now have 2500 miles on the sled & haven't fouled another plug. When I am waiting for the warm up light to go out as soon as the engine idles down to about 1700rpm I put a little throttle into it about 2200rpm until the warm up light goes out. Not sure if that helps or not but it is what I am doing & haven't fouled another plug.
What side did the plug foul on mine is always the clutch side and it is black and oily and its always on the warm up process
 

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Discussion Starter · #22 ·
What side did the plug foul on mine is always the clutch side and it is black and oily and its always on the warm up process
Can't remember which side fouled changed both plugs......hope you get your issue figured out......not like changing spark plugs in the 1970's.....
 
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