Question about 1982 Yamaha XJ 400

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Oil Blowing at the overflow hose

My XJ400 w 4GO engine are blowing too much oil at the over flow hose? specially when i'm running long drive? thanks please help

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  • Bobby Paterno
    Bobby Paterno Jan 05, 2014

    Sir Gunn i have it Check by the mechanic i was told that they check the oil level its okay< piston rings are okay but whwt they did id they disconnected the breather hose from the engine to the filter? is that okay?thanks again

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  • Contributor
  • 54 Answers

Cthe oil level isnt too high, then check up exhaust for any oily soot there, do a compression test, it may need piston rings. Also check engine breather hoses are clear.

Posted on Jan 02, 2014

  • Bobby Paterno
    Bobby Paterno Jan 03, 2014

    Thanks Sir Don Gunn i'll do that ...

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mxtras
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SOURCE: my 2001 yz 426f boils/blows out radiator overflow hose

The older YZF's radiators were a tad small so they would overheat when sitting still. Even the newer ones will do this if sitting still for too long as there is no air flow across the radiators to dissapate the heat.

The overheating problem is more severe on the older bikes. The best bet is to make sure you avoid sitting still for too long. I know it's not much of a solution, but it's just the way it is with the older YZFs.

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SOURCE: Maxim xj750 1982 = Feels like it's running on 3

Time for carburators clean up and synchro please visit this site..theres alot of info inthere !
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