yz426 fouling plugs

My 426 started to foul plugs after 3-4 1-2 hour rides. What is the prob. didn't do that in the last year, could get almost a season on a plug. What gives?

My dad had the same problem on his YZ 426. After multiple jetting changes and various other headaches it turned out to be float adjustment of all things......... Your manual will give a spec and show you how. It's worth a try if all else fails :banghead:

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