black tip spark plug
#1
black tip spark plug
i was doing some mantaince today u know oil change new oil filter clean air filter and new spark plug. When i toke out the old spark plug the tip was black am i runing rich or is this normal.
A couple weeks ago i started useing 89 octange gas because my atv was backfireing cuz the bike was runing lean so should i go back to useing 87 octange gas.
A couple weeks ago i started useing 89 octange gas because my atv was backfireing cuz the bike was runing lean so should i go back to useing 87 octange gas.
#4
#5
black tip spark plug
I think hondabuster is right.If it isnt fouling plugs then I wouldnt worry about it.Four strokes arent as sensitive as 2-strokes are when it comes to air and fuel mixture.If it is still backfiring though then someting needs to be changed but fuel octane will not fix that.
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