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Thread: 200es cam and cam bearings wasted again!

  1. 03-25-2010, 07:52 PM #1
    crashcbr900rr's Avatar
    crashcbr900rr
    crashcbr900rr is offline New to the board Arm chair racerNew to the board
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    200es cam and cam bearings wasted again!

    A good friend of mine has an 84 big red that just wasted cam and cam bearings for the second time. I was ridding with him when it happened and the wheels locked as the motor ceased. From what he told me over the phone, the cam and bearings are blued and scored from excessive heat. I told him that it sounds like he is not getting enough oil up to the head on his motor. I know that he must be getting some oil up there because he has put about 100 hours on the motor since the last time this happened to him and do not believe it would have lasted that long with no oil. My thought is that there may be a blockage anywhere from the oil pump up to the head possibly in the oil gallery or the oil rotor. Does anyone know of a problem with these motors as far as poor head lubrication? Any suggestions?
    83 atc 200e Big Red
    84 atc 200s
    84 atc 250r
    85 atc 110
    85 atc 200x
    85 atc 350x
    73 US 90
    73 US 90 parts bike
    (2) 88 220 Bayous
    82 CR 250r
    75 CB 360t
    00 XR 100r pit/stunt bike
    97 CBR 900rr
    07 HD Softail Springer Classic
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  2. 03-25-2010, 10:11 PM #2
    atc500x
    atc500x is offline Got The Holeshot Arm chair racerJust too addicted
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    Did he use only a gasket for the cylinder base? Very important......nothing other than a gasket....Many people have problem with it.Maybe the clutch cover gasket is broken,there is a oil gallery using the gasket.

    1986 ATC500X
    1985 ATC250SX
    1985 ATC200X
    1985 ATC250R
    1986 ATC250R
    1984 ATC250R
    1981 ATC70
    1984 ATC70
    1985 ATC70
    Custom built ATC70 / 250R laydwon swap
    1986 ATC250SX FATCAT
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  3. 03-26-2010, 05:27 AM #3
    jensenracing77's Avatar
    jensenracing77
    jensenracing77 is offline Got The Holeshot Arm chair racerJust too addicted
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    Quote Originally Posted by atc500x View Post
    Did he use only a gasket for the cylinder base? Very important......nothing other than a gasket....Many people have problem with it.Maybe the clutch cover gasket is broken,there is a oil gallery using the gasket.
    X2, also is the oil pump good?
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