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Thread: 1986 200x ATC where to get rocker arms, cam, and oil pump

  1. #16
    Join Date
    Jan 2005
    Location
    Orange County, CA
    --
    119
    Thanks for the additional info. I ended up using a clean cam off of a 1988 Trx200sx. Haven't run it yet, but the part number matched Honda's part number for the 200x. As for the chain, I got a used one off of ebay. When I put it on it had so much slack in it. I just didn't trust it. I ended up buying a DID 25h timing cam chain for a 70's honda and it was 104 links long. I bought a 25h chain breaker and rivet tool to break the cam chain and then re-rivet it back together. It came out perfect. I now have a chain that has 1/4 the slack of the used one I bought and it is a much stronger chain (the stock chain was a 25 chain and this cam chain was a 25h, the h is a heavier duty chain). The best part is it was long enough to make 2 chains, so now I have a spare.
    1985 ATC 250R
    1986 ATC 200X
    1986 TRX 250R

  2. #17
    Join Date
    Jan 2005
    Location
    Orange County, CA
    --
    119
    Click image for larger version. 

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    This is the chain that I bought. You can see how much larger it is. The 200x is back up and running once again. Thanks for all your help. The top end is a little louder than in the past, but I'm assuming the rockers will have to wear into the new cam a little. I pulled the bolt on the top of the rocker box and it was putting out plenty of oil, so I know that the oil pump is still good. Smoked a little more than normal, but that hopefully is just the assembly lube used and not valve blow by.
    1985 ATC 250R
    1986 ATC 200X
    1986 TRX 250R

  3. #18
    Join Date
    Jan 2005
    Location
    Orange County, CA
    --
    119
    https://youtu.be/WN-NBsxt3Ac

    https://youtu.be/KRSxtNhpl7Q

    Here's the old chain, I should have taken a video of the new chain, but it has so much less slack.
    1985 ATC 250R
    1986 ATC 200X
    1986 TRX 250R

  4. #19
    Jmoozy27's Avatar
    Jmoozy27 is offline Teaching Quads A Lesson Arm chair racerGot the holeshot
    Join Date
    Aug 2014
    Location
    South Louisiana
    --
    1,913
    That's freaking sweet Jason. You should make those chains and sell them in the 3ww shop. I'll buy 2 if you do. Glad you got it rolling.
    "Roll on 3"

    "Long Live the ATC"
    Building: ATCr125x
    Riding: ATC200sx
    "I am not a mechanic, mechanics get paid for this. I do it because I enjoy it."

  5. #20
    rodeofan5656's Avatar
    rodeofan5656 is offline Girlfriend wishes I'd last longer than 8 seconds Arm chair racerAt the back of the pack
    Join Date
    Dec 2011
    Location
    Park City, KS
    --
    382
    Hopefully i can get some help. Im needin to do the oil pump chain while im redoing my '86 X. Any chance you can give all the info or maybe do a write up on how you built your new chain? Its pretty much the last thing keepin me from going back together with mine.



    1986 Honda ATC200X
    2005 Yamaha Road Star 1700
    ToyHauler- 1998 Ram 3500 5.9L Turbo Diesel

  6. #21
    rodeofan5656's Avatar
    rodeofan5656 is offline Girlfriend wishes I'd last longer than 8 seconds Arm chair racerAt the back of the pack
    Join Date
    Dec 2011
    Location
    Park City, KS
    --
    382
    It said 2-3 times in this thread that the chain is obsolete. It has to be made. Thats why i asked if there could be a write up made about it with specific tools



    1986 Honda ATC200X
    2005 Yamaha Road Star 1700
    ToyHauler- 1998 Ram 3500 5.9L Turbo Diesel

  7. #22
    rodeofan5656's Avatar
    rodeofan5656 is offline Girlfriend wishes I'd last longer than 8 seconds Arm chair racerAt the back of the pack
    Join Date
    Dec 2011
    Location
    Park City, KS
    --
    382
    So with some googling, looks like china makes some 25hx44L timing chains. Not sure i would want to try it though.



    1986 Honda ATC200X
    2005 Yamaha Road Star 1700
    ToyHauler- 1998 Ram 3500 5.9L Turbo Diesel

  8. #23
    Join Date
    Oct 2002
    Location
    Northeast
    --
    16,060
    The 86/87 200X cylinder head is ABSOLUTELY NOT a matched set.

    The cam runs on ball bearings and not journals!!

    Be aware of bad information!!
    85 ATC70 - Work in progress.

    86 250SX - 11:1 compression, 350X carb, Bassani exhaust, 200X front end

    87 200X - Currently building for flat track, NEEDT series. Take out motor, powder coated gusseted frame 12:1

    86 350X - Receives all the best part donations from the 350RX

    86 350RX - Every mod I could ever think of. Take out motor, powder coated gusseted frame 12:1.

    07 21' Super Lite Weekend Toy Hauler; My home away from home!!

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