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oil in intake

  1. oil pouring out of breather hose.

    Repair & Maintenance
    back round, this is a 2002 400ex punched out to a 426, we took it apart because of a transmission problem, rebuilt the motor had no issues during assembly. we started the bike for the 1st time and it fired right up, let it idle for about 5 minutes, all is well, went out and rode very mildly...