Question:

Spark plug wear on motor cross?

by  |  earlier

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i have a kx 250 03 model using alot of plugs anybody know the life expectancy of a racing plug

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4 ANSWERS


  1. well they dont normally last an extremely long time sooo...


  2. If its a 2 stroke than not very long....it also depends on the mix you are using and how hard you run it.....I change mine after every trip

  3. I am assuming your a beginner????? if your fouling plugs alot.

    Go to one HEAT RANGE HOTTER, instead of a BR 9 run a BR10

    Always get NGK for a bike, I don't know why, but they last better, also you can get the iridium tip plugs they last a while.

    MAKE SURE YOU ARE RUNNING WHAT THE MANUAL says FIRST, then tune one range hotter if they are fouling out.

    Also you need to baseline your jetting to the manual settings, assuming your not in COLORADO.

    A poorly sqeezed air filter could affect your plugs but not rally usual.

    We race cross country, TCCRA.ORG and we get 4 and 5 races out of a plug. (100 miles a weekend)

    Plug wear can have as much todo with WHERE you ride and your RIDING style but really if your alwys putting around, your fouling them from throttle position. One range hotter will keep the TIP burned off.

  4. It really all depends on how hard you ride I have seen guys who change their plus after almost every time thay race and have seen other guys who go all season with only changing them once.

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