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1985 2001 2005 2006 250 250 clutch 250ex 250x 300ex 400 400 ex 400 ex trans problems 400ex 450r adjustment atv axle big bore kit bogging bolt brakes broken cam carb carb jetting carb problems carburetor cdi clutch compression electrical electrical problem engine engine rebuild engine wont start exahust exhaust fenders fuel fuel pump fuse help honda honda 250 honda trx honda400ex hondatrx400 hot cams idle jet jets jetting lights live mods neutral light new guy new rings newbie nfl no spark noise performance piston plastics quad rancher rancher350 rear axle rebuild recon repair shifting problems spark stage 2 hotcams starter stream swingarm timing tires top end top end rebuild transmission trx trx125 trx250 trx250ex trx250r trx250x trx300ex trx400 trx400ex trx450r tuning valve valves video wire harness wiring wont start
  1. Engine/EFI/Drivetrain
    i have a 400ex it has has 30 for compression. the cylinder wall has no scratches and looks good. its the stock piston in it. i noticed the first ring it collapsed or just stuck shut the other one isnt. should i just change the rings. or just oem piston and rings and change it or get it bored out...
    400ex compression crf450r timing
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