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Thread: cam chain tensioner???

  1. 04-16-2002, 10:55 AM #1
    yellow_ho_01
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    cam chain tensioner???

    alright,... i just got the 400 this past weekend knowing that something was wrong with it... i got it home and after a fairly extensive search found my problem to be the cam chain tensioner. i know that it is suposed to be an automatic adjustment but it doesnt work right, to my knowledge. I took out the tensioner and it seems to work fine, as far as being spring loaded and holding presure out,... i could not push it in. So i re-installed it and tightened it down until the "knocking" went away(i bearly had to turn it in much) so now the noisy is gone,.. WRONG, after reving the motor about 3-4 times.. somehow the chain got its slack back. So next i had the motor running and a screwdriver ready to turn the adjuster in, with the motor running i turned it in(again) until it went away, then i went alittle more,. i was still holding it in place while reving the motor, while reving i could feel the screw/tensioner backing itself out....? anyone out there have any ideas why its doing this and what i can do, beside spend money on a new tensioner?? i think it was like $50 from the local dealer,...
    -ATV ORF 2 name- PRAY-37

    FOR SALE 2000 400ex: nerf bars,AC front bumper, ANSWER bars, brake block off plate, new clutch perch and lever, WB E-series slip on, K&N power kit(165 main with no air box lid), K&N filter(not installed) WB filter with pre-ware,RAZR front tires,RAZOR rears on 10" Douglas Alum., 14T front,38T rear sprocket, tether kill switch, front wheels reversed and more to come... removed choke butterfly, custom GORTEX shock covers, and pre-ware airbox lid. custom made oil cooler scoops, brush guards... , , and 16T and 36T gearing.

    FOR SALE
    95 Skidoo Formula SS 670-new part/1" paddle,racing clutch, more..


    USED TO OWN :
    95 Kawasaki KX250
    2001 Polaris Sportsman 500 "THE TANK"
    84 KTM 600
    84 Honda XL600R
    84 Honda TRX200 some mods
    87 KX 125 with mods,
    82 RM 250 with mods,
    and 85 CR 500 with mods maxed out

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  2. 04-16-2002, 11:35 AM #2
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    CranMan
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    I'd say just get a new tensioner..it's not worth it to take a chance on messing up your motor....
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  3. 04-16-2002, 01:00 PM #3
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    knighttime
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    get a f'n manual

    from www.helminc.com and u will be ready to fix it correctly.
    '00 Budweiser 420SS, XR cam, JE 10.8:1 416 piston, FMF 4Q with Powerbong , AC Pro Pegs, skid & bumper, UniFilter, 6 airbox vents, 42 pilot; 165 main; clip 4 down, chokeless, stock fuel screw position (= 2 1/4 turns out), hydraulic clutch
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  4. 04-16-2002, 10:11 PM #4
    JhallettEX
    JhallettEX is offline C&D Racing, 308-696-7805
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    I am having the same problem, someone have any ideas?
    C&D Racing, 308-696-7805

    SOLD ---------- SOLD

    2001 400ex, JE 416 10.8:1, Hotcams Stage 2 Cam, C&D Racing Port and Polish, Viton Valve seals, 39mm FCR Carb, Complete Curtis Sparks X-6 Exhuast, Sparks Timing Key, Magnum Rev Limiter, Sparks 8 Plate Clutch, Race Cut Fenders with CarbonFiber Hood with Scoop w/ mesh insert, Magura Hydrolic Clutch, Steel braided clutch line, Holeshots MX Rear on Red Labels, Holeshot MX Front on Red Labels, K&N Air Filter with Prefilter, ShockWears, AC Skid Plate, and Polished Propeg Nerfs, TAG X-5 Bars, Kill Switch, DR Blockoff Plate, OMF Radiator Shrouds, Elka Triple Rate SSD, Rear Elka Rebuild, +2 Houser a-arms (HammerTone and Chrome), Lonestar Axcaliber 2 + 2 axle, Polished Motor Mounts and Sidecase, DR number plates, PEP Steering Stabilizer.

    C&D Racing, 308-696-7805
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  5. 04-17-2002, 08:56 AM #5
    Guest
    Ask gabe...
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  6. 04-17-2002, 09:09 AM #6
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    knighttime
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    Post tensioner

    Its real tricky to get that tensioner and chain hooked up right. If u don't have a good manual that explains it, u r f'd!
    '00 Budweiser 420SS, XR cam, JE 10.8:1 416 piston, FMF 4Q with Powerbong , AC Pro Pegs, skid & bumper, UniFilter, 6 airbox vents, 42 pilot; 165 main; clip 4 down, chokeless, stock fuel screw position (= 2 1/4 turns out), hydraulic clutch
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  7. 04-17-2002, 12:05 PM #7
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    CranMan
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    I don't remember anything hard about it..you just have to keep it retracted while you put it in and tighten the bolts, then you let it spring out and it presses against the chain guide wear strip and that's all there is to it. The thing is, if it's working right, you can only compress it in while turning the screw that's UNDER the phillips head screw cap. I don't think it's designed to retract under normal conditions, only when you turn that screw...
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  8. 04-17-2002, 03:31 PM #8
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    Leo
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    If you let it extend fully, then tried to draw it back into the motor with the bolts.. you either screwed up the tenisoner and/or perhaps some of the chain guides..

    Your supposed to turn the screw on the back to retract it, then install it on the motor (while holding the screw).. Then it should automatically take up the slack..

    You didn't state the age of your machine, but it's possible that it's time for a cam chain..?

    Leo
    You know the world is going crazy when France is accusing the US of arrogance, and Germany doesn't want to go to war.
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  9. 04-17-2002, 07:08 PM #9
    yellow_ho_01
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    im thinking i need a new chain... i did alittle playing with the adjuster, and i think it is alomst maxed out... i might see if i can borrow a friends(WISHERTDF... HINT, HINT) tensioner, and see if it is better, then ill know its just the tensioner, and not the chain. Thanks for all the help though.
    -ATV ORF 2 name- PRAY-37

    FOR SALE 2000 400ex: nerf bars,AC front bumper, ANSWER bars, brake block off plate, new clutch perch and lever, WB E-series slip on, K&N power kit(165 main with no air box lid), K&N filter(not installed) WB filter with pre-ware,RAZR front tires,RAZOR rears on 10" Douglas Alum., 14T front,38T rear sprocket, tether kill switch, front wheels reversed and more to come... removed choke butterfly, custom GORTEX shock covers, and pre-ware airbox lid. custom made oil cooler scoops, brush guards... , , and 16T and 36T gearing.

    FOR SALE
    95 Skidoo Formula SS 670-new part/1" paddle,racing clutch, more..


    USED TO OWN :
    95 Kawasaki KX250
    2001 Polaris Sportsman 500 "THE TANK"
    84 KTM 600
    84 Honda XL600R
    84 Honda TRX200 some mods
    87 KX 125 with mods,
    82 RM 250 with mods,
    and 85 CR 500 with mods maxed out

    http://photos.yahoo.com/yellow_ho_01
    http://photos.yahoo.com/yellow_ho_01_2
    http://photos.yahoo.com/red_400ex_00
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  10. 04-19-2002, 05:33 AM #10
    yellow_ho_01
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    it worked....

    i switched cam chain tensioners and it works fine.... there is no chain slap now. I sat there and played around with both of them in my hand and i could tell any difference.... but his did hold the tension on the chain, so i guess i will be buying a new tensioner,... anyone know of some good honda discount places... guess ill just look in the back of one of my mags.....again, thanks for the help
    -ATV ORF 2 name- PRAY-37

    FOR SALE 2000 400ex: nerf bars,AC front bumper, ANSWER bars, brake block off plate, new clutch perch and lever, WB E-series slip on, K&N power kit(165 main with no air box lid), K&N filter(not installed) WB filter with pre-ware,RAZR front tires,RAZOR rears on 10" Douglas Alum., 14T front,38T rear sprocket, tether kill switch, front wheels reversed and more to come... removed choke butterfly, custom GORTEX shock covers, and pre-ware airbox lid. custom made oil cooler scoops, brush guards... , , and 16T and 36T gearing.

    FOR SALE
    95 Skidoo Formula SS 670-new part/1" paddle,racing clutch, more..


    USED TO OWN :
    95 Kawasaki KX250
    2001 Polaris Sportsman 500 "THE TANK"
    84 KTM 600
    84 Honda XL600R
    84 Honda TRX200 some mods
    87 KX 125 with mods,
    82 RM 250 with mods,
    and 85 CR 500 with mods maxed out

    http://photos.yahoo.com/yellow_ho_01
    http://photos.yahoo.com/yellow_ho_01_2
    http://photos.yahoo.com/red_400ex_00
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