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Thread: '85 250es timing chain adjustment

  1. #1
    Join Date
    Apr 2014
    Location
    Greenville, TX
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    137

    '85 250es timing chain adjustment

    Ok I have searched the internet and here for how to adjust the tension on the timing chain. The only thing I found was on another forum that was using a pic as reference. Only prob was is the post was so old the pic was gone. Can someone please post how to do this on the Big Red. I think the 250sx is also the same if I'm not mistaken.
    Currently Own
    '85 Honda Big Red 250es
    '84 Honda Big Red 200es
    '81 Honda ATC 185s
    Unk yr Adventure Vehicles 3 wheeler

  2. #2
    stillhunter's Avatar
    stillhunter is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Apr 2010
    Location
    Port Perry Ontario Canada
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    180
    If its the same as the sx then its automatic. No manual adjustment. You can pull the tensioner though to make sure its working as it should. Two bolts one on each side and it slides right out the center bolt on the end gives access to a winder that when removed you can insert a small screwdriver and wind which retracts the tensioner. Pull the screwdriver and it springs out again.


    85 250sx..The Big sexy
    84 200s....Crazygirl

  3. #3
    Join Date
    Apr 2014
    Location
    Greenville, TX
    --
    137
    Ok so its not a routine maintenance item then. I was just curious how to do it. I could not figure it out. Thank you.
    Currently Own
    '85 Honda Big Red 250es
    '84 Honda Big Red 200es
    '81 Honda ATC 185s
    Unk yr Adventure Vehicles 3 wheeler

  4. #4
    mike84bigred's Avatar
    mike84bigred is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Oct 2006
    Location
    North Tonawanda, NY
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    343
    I am not saying your situation will be the same, but mine clanked for a few years will no issue at all, and I drove it pretty hard. When I rebuilt the motor, I replaced it. Its not a terribly hard job. You have to take the head cover off, and the primary clutch, possibly the oil pump if I remember correctly. Been a few years since I did it, and have done a lot since then.
    84'200s (Dad bought new in 84, long gone)
    84'YTM200 (sold 02)
    85'KLT160 (sold 05)
    84' Big Red (Cobra exhaust,good shape) sold in 08
    84' Big Red (Parts Bike, runs good though)sold in 08
    85' 250SX (New plastic, Clark Plastic Gas Tank, Web Cam Camshaft, Cobra Exhaust, Moose Jet Kit, etc..) sold in 2010 and highly regret!!!
    04 Polaris Sportsman (Swapped 400 motor with a 500, Polaris wheels w/Kendra Bearclaws, Moose Fender Flares, Brushguard, Warn Winch)
    84 200s (Needs work!)

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