Results 1 to 7 of 7

Thread: ATC 185s oil in exhaust.

  1. 01-07-2016, 02:45 AM #1
    81ATC185S
    81ATC185S is offline First Time Rider Arm chair racerNew to the board
    Join Date
    Nov 2015
    Location
    Manitoba Canada
    --
    117

    ATC 185s oil in exhaust.

    I have a 81 ATC 185s that was smoking really bad, I put new valve guide seals in thinking that was the problem and I reassembled the engine. I did a compression test and it checked out a little low but good enough and I had no exhaust when I bought the bike so I threw a straight pipe on it. It started up fine no smoke then it ran for a bit and slowly oil started pooling out of the exhaust. Like actual oil not just mist, I am talking FULL ON ACTUAL STANDING OIL in the exhaust. Any ideas on what the cause could be?
    1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
    1986 ATC 250ES. *Total garbage trying to sell it*
    1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
    1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
    Reply With Quote Reply With Quote
  2. 01-07-2016, 03:55 AM #2
    tri again
    tri again is offline Power User The day begins with 3WW
    Join Date
    Mar 2010
    Location
    Pacific NW
    --
    4,255
    185? Vertical engine?
    Oil in exhaust pipe, and not the airbox?
    Does it seem to run ok other than that?
    Not sure if it has a decompression lever or that even matters.

    Any chance the valve seal come loose?
    The search key has been working great these days so maybe try some keywords like
    'oil in exhaust' or oil exhaust, and don't be afraid to read posts even if it's not your specific machine.

    Pls let us know what you find.
    Reply With Quote Reply With Quote
  3. 01-07-2016, 07:52 AM #3
    DohcBikes
    DohcBikes is offline Trikein' Away Lord of the trike
    Join Date
    Oct 2013
    Location
    Wherever I May Roam
    --
    3,757
    What were your compression numbers? Is there oil on the spark plug?
    Reply With Quote Reply With Quote
  4. 01-07-2016, 10:25 AM #4
    81ATC185S
    81ATC185S is offline First Time Rider Arm chair racerNew to the board
    Join Date
    Nov 2015
    Location
    Manitoba Canada
    --
    117
    Compression numbers are about 150 and there is very slight oil on the plug ill tear into it today.
    1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
    1986 ATC 250ES. *Total garbage trying to sell it*
    1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
    1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
    Reply With Quote Reply With Quote
  5. 01-08-2016, 09:11 AM #5
    3wheelrider's Avatar
    3wheelrider
    3wheelrider is offline Got The Holeshot Arm chair racerJust too addicted
    Join Date
    Jan 2009
    Location
    Miami,Fla.(305)
    --
    808
    Quote Originally Posted by 81ATC185S View Post
    Compression numbers are about 150 and there is very slight oil on the plug ill tear into it today.
    My guess is its missing the o-ring on the rear cyl.stud. Or the o-ring is damaged...
    With the angle of the cylinder-oil will seep back into the cylinder instead of seeping outwards(outside)
    ?????.
    Previously Owned:
    1985 ATC 250R (261cc)- 38MM PWK QV/AS, VFORCE3, RPM TIMING ADV., FULL DG EXH, CLARKE WHITE TANK, DOUGLAS RED LABELS, PRM NERF BARS, + ALUM. PARTS
    1983 ATC 185S (186cc)- HI COMP., BASSANI HEADER, REAR DISC BRAKE CONV., '86 200X HUBS, ALUM. RIMS, DIRT DEVILS
    1982 ATC 185S (224cc)- PK WELD-ON KIT, PK CLAMPS, PK EXHAUST, SL90 SHOCKS, OIL COOLER, PCCC RIMS
    1981 ATC 185S
    1984 ATC 250R
    1981 ATC 250R
    1983 ATC 110
    1969 HONDA MINI TRAIL 50


    TRIKELESS
    Reply With Quote Reply With Quote
  6. 01-08-2016, 12:08 PM #6
    81ATC185S
    81ATC185S is offline First Time Rider Arm chair racerNew to the board
    Join Date
    Nov 2015
    Location
    Manitoba Canada
    --
    117
    Yeah I don't think it actually has oil out the exhaust. it just smokes like a vapour and then pools in the exhaust. I think I need new rings because it has a new head gasket as well. I didn't replace the rings or hone it when I had it apart because I am no mechanic but I thought the cylinder walls looked pretty good. They probably aren't good enough I guess.
    1983 ATC 185s 200 jug bored .20 9.5:1 Naumura piston. Fast as ass when its not stretching the drive chain or stripping hubs.
    1986 ATC 250ES. *Total garbage trying to sell it*
    1983 YTM 200E. Runs good, forks are super bent but aside from that its mint.
    1984 YTM 200L. Barn find, everything is mint except the bottom end is bad... *waiting on a new engine*
    Reply With Quote Reply With Quote
  7. 01-10-2016, 12:39 PM #7
    Gearheadtom's Avatar
    Gearheadtom
    Gearheadtom is offline Got The Holeshot Arm chair racerJust too addicted
    Join Date
    Oct 2008
    Location
    NB, Canada
    --
    852
    The cylinder/piston might look good, but could not measure in spec. The best way is to have the cylinder measured, see how far oversized it needs bored, new piston, gaskets, etc..., but hone the cylinder a little, new rings, new head gasket, and it'll probably be alright.
    Rides:
    1985 250sx
    1982 ATC185s
    1984 200es

    Always Hoping For a Maritime Trikefest- http://www.3wheelerworld.com/showthr...s-where-you-at

    "Wear Limits Are Just A Suggestion"
    Reply With Quote Reply With Quote
//ArrowChat Integreation Code //