![]() The moto's are kind of short, about 15 miniutes and the track has only one straightaway about 250 feet long coupled with his skill level I know that the combustion chamber tempeture is not is high as it should be. The indoor track we go to doesn't have real good ventilation so I need to warm the bike up outside then shut it off and wait until his class is up. The colder weather should make it run leaner, but you couldn't see it on the plug. I then changed to a BR9EG and the fouling problem got worse. The weather got a lot colder and started riding at a shorter indoor track. The plug was black and wet with lots of spooge coming out of the pipe. The orgimal plug (BR10EG) lasted a couple of rides and only fouled when he dumped it over. We bought the bike in September when the tempeture was in the low 70's and riding it at a larger outdoor track (longer straightaways) with the Stock carb adjustments, 32:1 Yamalube & Premium pump gas.
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