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Thread: 1986 200x oil pump chain loose?

  1. #1
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    1986 200x oil pump chain loose?

    so, i recently got an 86 200x. tore the side cover off to check out the internals and it seemed to be in alright condition. the one thing i noticed was the chain that drives the oil pump is very loose. so much slack that it could possibly touch the case and shows signs of slight wear to the case. could the chain just be worn and stretched? is this a common thing to run into? thanks for any help. wanna clear this up before i waste a gasket and put it back together. matt
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  2. #2
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    Quote Originally Posted by skidoo99 View Post
    so, i recently got an 86 200x. tore the side cover off to check out the internals and it seemed to be in alright condition. the one thing i noticed was the chain that drives the oil pump is very loose. so much slack that it could possibly touch the case and shows signs of slight wear to the case. could the chain just be worn and stretched? is this a common thing to run into? thanks for any help. wanna clear this up before i waste a gasket and put it back together. matt
    Yes they are sorta loose fitting, you need the thin steel plate cover. If your chain is hitting the case i'd replace it. A couple years ago someone on here was making them i cant remember who? While your in there take the two oil pump bolts out and check your pump gears, theres no gasket behind the pump just a snug fit, pull it out straight. Click image for larger version. 

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    While your in there, if you havent you should clean the oil filter rotor. I replaced the philips screws w/allen heads screws (easier for next time)Click image for larger version. 

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    Last edited by Shep1970; 11-22-2016 at 09:50 PM. Reason: Grammar/

  3. #3
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Cool, thanks for the tips. First time playing with one of these 200 motor. I cleaned the rotor and like the idea of the hex screws. As for the chain, mine looks noticeably looser than your picture. Maybe I'll see if I can locate one. We're the 200 motors the same as the 200x of the generation?
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  4. #4
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    The chain if u can find one new from:
    86/87 200x
    Tr200 fatcat
    86-88 trx200sx
    I believe thats all your choices in the chain size u need.
    Heres a pic w/chain pushed to right Click image for larger version. 

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    I dont think theres many miles on this extra bottom end (just to give idea)

  5. #5
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    There all sloppy. I have found a few motors without that plate guide and each chain flopped around like a fish.....
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  6. #6
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    ok cool, thanks guys. so my chain has about 3/4 inch play which seems excessive. ill try and locate a chain and sprocket. if not, oh well. so another thing, i was putting around and spun the clutch by hand. heard a strange noise and noticed that there was a spring behind it attached to a mechanism (not sure yet what its for) that was rubbing the backside. push the spring out of the way and they didnt touch. strange to me cause it doesnt look like it can be route another way. ideas???
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  7. #7
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    Kick shaft spring? If u turned that shaft while case is open, make sure to reset it (spring) before you put case cover back on.
    Or gear selector shaft spring (pic) Click image for larger version. 

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    I have this open motor 5 feet from me if you need any more pics
    "Just be careful in that case or you'll find out real quick that there is certain parts you wont find anywhere."

    If your really worried about the chain, drive down to mass i'll give you a (used) one that may fit tighter.
    Last edited by Shep1970; 11-23-2016 at 10:45 PM. Reason: Added line

  8. #8
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Thanks shep, I'm going to try and post a pic but it's the shifter spring that is touching the backside of the clutch basket. Maybe I'll try and bend it a little to gain the clearance I need.
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  9. #9
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    East of Worcester ma
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    Dont bend it, the gear selector shaft may be pushed/pulled out too far. First try to change gears while turning output shaft (small sprocket) if it binds/doesnt work right The shaft may have to slide back. There close but that spring should not hit.. Just take your time and try to watch how it works, have someone turn sprocket slowly as u change gears.
    I'll put up a pic that may help: Click image for larger version. 

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ID:	237287 straight edge across gasket surface shift rod is a dime thickness back. Hope that makes sense.

    Ok- i pulled my assembly out to have the issue your having, the pencil point is aiming at a little shaft rivited on to that outer plate, make sure its pushed into the slot behind it. Dont have to change gears just move it around a little it should all fall into place.Click image for larger version. 

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    Last edited by Shep1970; 11-25-2016 at 09:10 PM. Reason: Added pic/line

  10. #10
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    so this is a little off topic as what the original post was, but after looking a little deeper into the wiring harness, someone has been in there and hacked it together. electrical tape and twisted wires everywhere. also, the voltage regulator was just missing totally. so im in need of a good non hacked up harness and a voltage regulator. ebay is a pain in the ass and i would rather pay someone here. anyone have anything i am in search of they are willing to part with?
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  11. #11
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    East of Worcester ma
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    Good to meet u matt.
    There is a washer on the lower chain tensioner shaft actually 1 on either side of tensioner so theres 2. And nut
    I will put a pic of the 86 and 87 kick shaft the 86 is about 3mm smaller so you really should find a decompression cable, i hear stories of the smaller shaft shearing off without it.
    If you look closely at the shafts theres a washer that needs to be on the shaft before the cover is put on (it usually sticks to the cover w/oil when u take the cover off). I dont think the washer u showed me was it. Dont use any rtv just a thin layer of oil on the gasket. Heres two cable attachment pics also. Hope this helps
    --i just checked one of the washers on tensioner is actually a collar. Last pic
    Click image for larger version. 

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    Show a picture of that little 3-wheeler you showed me here or if your not sure how, send it to me and i will.
    And a pic of that washer u have next to a quarter to judge size, someone here may recognize it.
    Last edited by Shep1970; 12-04-2016 at 02:49 PM. Reason: Added pics,added line

  12. #12
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    When I get my cylinder and head back for the 87 200X motors, I'm changing the clutch; So, I'll see how loose that chain is in my new take out motor.
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  13. #13
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    Quote Originally Posted by Dirtcrasher View Post
    When I get my cylinder and head back for the 87 200X motors, I'm changing the clutch; So, I'll see how loose that chain is in my new take out motor.
    That would be great!!! That chain is always questioned..

    Shep

  14. #14
    skidoo99 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    thanks for the help shep. ill get some pics up tomorrow when i get home from work. the decomp lever at my cylinder head is actually almost like a choke lever as it is used to push up by hand. doesnt have a place to attach the barrel end of a cable.
    1973 70
    1984 70
    1986 250sx
    1986 250es
    1986 250r

  15. #15
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    East of Worcester ma
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    Quote Originally Posted by skidoo99 View Post
    thanks for the help shep. ill get some pics up tomorrow when i get home from work. the decomp lever at my cylinder head is actually almost like a choke lever as it is used to push up by hand. doesnt have a place to attach the barrel end of a cable.
    Ok, well someone put a trx200sx topend on it. Its pretty much the same except that lever.
    i have that lever on my trx motor,

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