Chain Tensioner Some thoughts on chain tensioners....

Discussion in 'Transmission / Drivetrain' started by kelli, Oct 31, 2016.

  1. kelli

    kelli New Member

    HI Everyone, first off, I'd like to thank each and everyone of you and your extreme knowledge of my vehicle, and sharing it with us, me in particular. :) With little knowledge when I purchased Penelope 2 yrs ago, I was at the mercy of "my bike guy" when it came to anything really about the care, up keep and repair, and it sucked. So I fired said bike guy and with your help on this forum, and numerous uTube videos, I am free, free at last of the bike guy. Replaced Carb, throttle, CDi, and sadly after it rained on me, the motor that was on her (66cc), major parts he'd put on, so now I know if it's good and right.
    So I did just put a bigger #41 chain on her, so now she needs a bigger and better tensioner to handle it. What might be some of your recommendations? I don't have tools or much skill at making one myself, ( She is a daily driver, and she has to pull a lot of hills, if that matters). Any help in this matter would again, be greatly appreciated.
    I'm sure like myself, there is a lot of us learning a great deal from y'all, but just aren't big class talkers. Thanks so much again for this forum, and your input and hope everyday is a great ride..

    Kelli
     

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  2. Supercoke

    Supercoke New Member

    This is the best you can buy, imo, because it is slightly adjustable:
    http://www.ebay.com/itm/49-66-80cc-...ensioner-Spring-Loaded-Michigan-/182291853613
    The most important thing to remember is that the chain has a straight path from the engine output sprocket to the rear wheel.
    I fabricated something very similar out of the stock spring chain tensioner and it is pretty solid.
    20161005_093022[1].jpg
    20161005_093039[1].jpg
    These are images of the prototype, it looks much cleaner now. You can't see it but I used washers to move the wheel to the correct chain position. Good luck!
     
  3. kelli

    kelli New Member

    Thanks so much for your response to my question. There is not a lot of slack in the chain, and is really basically there to feed the chain now, so it doesn't "kink' under the clutch arm. I do always make sure everything is lined up straight, as I usually on top of the bike looking down whenever I had to adjust the previous chain. I can only wonder what the fly on the wall must be seeing tho. Thanks again, and hope everyday is a great ride!
     
  4. skyash

    skyash Active Member

    Have you got something to hold the sprocket on Tru ? That helps so much ...I use stock tensioner with spring and a hook I can adjust .The One with The Red nut is on a 4 stroke 142f and the other the on a pocket bike motor on a push bike I got the 4 stroke spring from a shop the pocket bike bike spring is from a kick stand . Best mod ever till I got something to make the sprocket run Tru
     

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  5. D. White

    D. White New Member

    I first used the scary stock tensioner with a self tapping screw through the bike frame. I had no problems with it but didn't trust it. Now I use a spring type tensioner which was purchased from kings motor bikes for about $50. It is very light in weight which is good and bad. Its not a great tensioner nor a horrible one. I have had no problems with it yet, but only have about 50 miles on it (top speed 43mph). My chain is fairly tight and it could run without it. Oh and by the way I had to slightly bend left pedal crank out maybe a 1/16" to clear side of engine once the new tensioner was installed.
    20160906_200449.jpg View attachment 74467
     

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  6. skyash

    skyash Active Member

    $50 to much I expect a real motor bike tensioner for that ...or bolt the stock tensioner to the engine put a Spring . only $5
     
  7. D. White

    D. White New Member

    Sorry, really a little less than $40. Probably cost them less than a dollar to make. I ordered a few other things and figured I would give it a try. I do like the looks of it and might use it as a template for an upgrade later.
     
  8. skyash

    skyash Active Member

    All good I just hate how everything is so expensive but the engines are not lol
     
  9. butre

    butre Well-Known Member

  10. D. White

    D. White New Member

    I have quite a few other projects other than bicycles (71 chevelle, 70 c-10, 89 Toyota pickup lowrider to name a few) which cost a lot to build. To be honest the price of the bicycle engines is what made want to build one. I thought I could finally get a project finished for little money......well after diverting truck funds to bicycles i realize.......
    1. There is no limit to how much you can spend on anything
    2. There is no such thing as a finished project
    3. Everything needs a motor
     
  11. Nature girl

    Nature girl New Member

    The affordability of these machines is appealing for sure! Can`t afford a hot rod, my MB will have to do.
    Back to chain tension, I used a couple of standard kit engine back straps with a long bolt clamped to my seat tube. Re-purposed a bearing, and made an arm from 1/4 inch aluminum plate. It`s been on my bike since first created.
    Best to all.
     

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  12. kelli

    kelli New Member

    Wow, thanks a lot for your info. I don't have the tools, or know how, yet :), to make my own, but a good friend up the street does, and, he's going to guide me through the process. I'll let you know what we come up with. Thanks again and hope everyday is a great ride.
     
  13. Bike guy 69

    Bike guy 69 Guest

    This is sooooo true
     
  14. CrazyDan

    CrazyDan Active Member

    Lol I've spent about $580 on my 53cc 4 stroke huffy cranbrook. I calculated it to be roughly $850 if I bought everything new. Only parts left that are huffy is the frame and steerer headset. Got shocks and all...but I still want to spend at least $250 on it to deem it perfect. Its never done >_<
     
  15. butre

    butre Well-Known Member

    I probably spent $900 on my bike. don't even want to think about what everything would have cost new
     
  16. Steve Best

    Steve Best Well-Known Member

    Just had another $58 box arrive today, gaskets, piston, bearings.
    I could'a spent it on booze... Wait a minute!

    Steve
     
  17. gary55

    gary55 Well-Known Member

    Boxes and booze are special!
    [​IMG]
     
  18. Street Ryderz

    Street Ryderz Well-Known Member

    love the boxes full of parts and stuff you guys can have the booze!
     
  19. gary55

    gary55 Well-Known Member

    The bottle is really more of a theme prop. It's still at the top of the label, and I bought it a year ago.
     
  20. Steve Best

    Steve Best Well-Known Member

    I have a Kegerator in the garage.
    A fridge with 4 kegs of beer in it.
    I just have a little sip at a time, but sometimes I find myself getting disorientated...
    [​IMG]
     
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