Results 1 to 10 of 10

Thread: 85 250r Chain Tension Problems

  1. 02-11-2007, 10:38 PM #1
    Jaredkov
    Jaredkov is offline New to the board Arm chair racerNew to the board
    Join Date
    Dec 2006
    Location
    Texas
    --
    38

    85 250r Chain Tension Problems

    Alright guys I'm having trouble keeping the chain on my 85 R to remain tensioned.

    I adjust it out and snug the retaining bolts on the swingarm down good to lock it in, but after a few hours of riding it becomes loose or it will cause the chain to become overtightened.

    Any ideas of what could be going on?


    Thanks
    Jared
    Reply With Quote Reply With Quote
  2. 02-12-2007, 12:28 AM #2
    DeePa
    DeePa is offline Power User Got the holeshot
    Join Date
    Jan 2005
    Location
    RI
    --
    2,530
    axle bearings? swinger bearings? possibilities
    1986 Tri-z
    1985 250r
    1985 200s
    1985 70[/SIZE]
    Reply With Quote Reply With Quote
  3. 02-12-2007, 11:51 AM #3
    Jaredkov
    Jaredkov is offline New to the board Arm chair racerNew to the board
    Join Date
    Dec 2006
    Location
    Texas
    --
    38
    How do i go about checking the axle bearings?
    Reply With Quote Reply With Quote
  4. 02-13-2007, 02:33 PM #4
    Jaredkov
    Jaredkov is offline New to the board Arm chair racerNew to the board
    Join Date
    Dec 2006
    Location
    Texas
    --
    38
    Can anybody help me out with this?
    Reply With Quote Reply With Quote
  5. 02-13-2007, 03:23 PM #5
    GPracer2500's Avatar
    GPracer2500
    GPracer2500 is offline First Time Rider Arm chair racerNew to the board
    Join Date
    Nov 2006
    Location
    AZ
    --
    139
    Is your bearing carrier actually moving? What I mean is, when you get the chain adjusted, go ride, and find the chain is too loose or too tight, is it because the carrier is moving from where you had set it?

    Also, make sure your chain/sprockets don't have a drastic tight spot and loose spot. If your finding that sometimes your chain is too tight and other times it's too loose then this seems the likely cause. It can drive you crazy when adjusting the chain until you figure out what's going on. I haven't seen it so much on ATVs, but nearly all motorycles I've owned have had varying degrees of "tight" and "loose" spots depending on how the wheel was oriented. Tolerences in the chain, sprockets, and hub are responsible. I think its mostly the hub and rear sprocket--actually the mounting interface of the two.

    Make sure you're adjusting your chain with it oriented in its tightest position. Then rotate the wheels around to the loosest postion and make sure it's not TOO loose in that spot.
    Reply With Quote Reply With Quote
  6. 02-13-2007, 03:30 PM #6
    4cylinders
    4cylinders is offline Got The Holeshot Arm chair racerJust too addicted
    Join Date
    Jan 2003
    --
    842
    hey, check your swing arm, and axle bearings. loose bearings can cause problems.
    one cylinder is not enough!!
    Reply With Quote Reply With Quote
  7. 02-13-2007, 04:24 PM #7
    Jaredkov
    Jaredkov is offline New to the board Arm chair racerNew to the board
    Join Date
    Dec 2006
    Location
    Texas
    --
    38
    Quote Originally Posted by GPracer2500
    Is your bearing carrier actually moving? What I mean is, when you get the chain adjusted, go ride, and find the chain is too loose or too tight, is it because the carrier is moving from where you had set it?

    Also, make sure your chain/sprockets don't have a drastic tight spot and loose spot. If your finding that sometimes your chain is too tight and other times it's too loose then this seems the likely cause. It can drive you crazy when adjusting the chain until you figure out what's going on. I haven't seen it so much on ATVs, but nearly all motorycles I've owned have had varying degrees of "tight" and "loose" spots depending on how the wheel was oriented. Tolerences in the chain, sprockets, and hub are responsible. I think its mostly the hub and rear sprocket--actually the mounting interface of the two.

    Make sure you're adjusting your chain with it oriented in its tightest position. Then rotate the wheels around to the loosest postion and make sure it's not TOO loose in that spot.
    Yes the carrier is moving from where i had it set, I marked the carrier and swingarm with whiteout to make sure that is whats happening.
    Reply With Quote Reply With Quote
  8. 02-14-2007, 10:59 PM #8
    Jaredkov
    Jaredkov is offline New to the board Arm chair racerNew to the board
    Join Date
    Dec 2006
    Location
    Texas
    --
    38
    No one else has ran into this before?

    How do i check the rear wheel bearings? What should i be lookin for?

    Jared
    Reply With Quote Reply With Quote
  9. 02-15-2007, 10:17 AM #9
    nate b
    nate b is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jan 2003
    Location
    Central WI
    --
    433
    I had that same problem, bearings were fine, chain and sprockets were newer. Finaly just went and got a new swingarm. Dont know what caused it but I asume the end of the swingarm was just stretched.
    NATE
    85 atc 250r;
    PSI porting & head mods
    fmf pipe & silencer
    boysen rad valve & reeds
    38mm air stryker
    Reply With Quote Reply With Quote
  10. 02-15-2007, 10:52 AM #10
    Jason Hall's Avatar
    Jason Hall
    Jason Hall is offline Power User Roostin Away
    Join Date
    Jun 2005
    Location
    Jackson MI
    --
    1,688
    Check the bottom of the swingarm pinch point, I've seen them tear from being over tightened. This couuld cause your problem. The outer ends of the swinger Is where the carrier Is squeezed tight.

    83 ATC 60-R Cr60 converted with Zinger parts.
    83 ATC 70.
    83 Tri zinger
    ATC 85-R Cr85 engine on shortened 86-R frame.
    ATC450AF
    86 310-R Drag racer
    440 snowmobile powered custom built.
    87 Cr 500 Converted to Drag racer
    Reply With Quote Reply With Quote
//ArrowChat Integreation Code //