Im confused about all the chain tensioner problems

Discussion in 'Motorized Bicycle General Discussion' started by fall_down_stand_up, Oct 31, 2009.

  1. fall_down_stand_up

    fall_down_stand_up New Member

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    I have been riding these bikes for 4 years now and have never had a problem with the chain tensioners that come with the kits(other than the roller wearing out after a ton of miles)....What are the problems alot of you guys are having with them??????????Show pics of your modifications and why you had to do it....
     
  2. BarelyAWake

    BarelyAWake New Member

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    lol - the dreaded "tensioner" is a potential threat if not installed correctly or maintained, I suspect ya did both ;)

    It could dive into the spokes and destroy the wheel which I'm sure you've figured out by lookin' at it - it's a shame really cause it would be a simple matter to supply one that spans both bars.

    The concern is for the many first-time builders that may foolishly think that all of the parts in the box will do the job they're supposed to do if they just bolt 'em on lol It's also about the only part that so easily endangers the whole build and the rider for the sake of tightening a bolt o_O

    http://motorbicycling.com/f11/chain-tensioner-suggestions-11815.html
     
  3. toker_ace

    toker_ace Member

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    here is my latest tensioner.
     

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  4. sojudave

    sojudave New Member

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    Been there, done that. It ripped about 5 spokes out of my rim, and it sheared off the bolt that holds my brake arm to the frame. My fix was to take out an extra link from the motor chain.
     
  5. bandito

    bandito New Member

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    Problemo Fall from what I read is the tensioner twisting inward from the pressure applied from the chain riding on it. Some folks drill a hole into the frame and insert a screw to fix that or others have it extremely tight in order to prevent that. Whats your secret? To me the mounts that bolts to both chain stays is the right solution or to fix the chain to proper length.
     
  6. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Never had a problem.

    I do spend five minutes adjusting and bending/twisting them before installation.
     
  7. Evanewk

    Evanewk New Member

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    WOW. THIS IS AWESOME!

    It is simple, functional and build-able from parts at home depot and a few basic tools.

    Kudos to you.
     
  8. fall_down_stand_up

    fall_down_stand_up New Member

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    My secret is I do the same thing BikeguyJoe does,tweek it to make it just right and tighten the bolts real good....Heck I dont even use electrical tape or anything like that wraped around the frame....
     
  9. bairdco

    bairdco a guy who makes cool bikes

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    chain tensioner. the thread that never dies...
     
  10. 2door

    2door Moderator
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    Hahahahaha,,, Bairdco is right. I'll bet if we went back and searched every post that has ever been made here that we'd find more about this provocative subject than any other. The topic comes up day after day, week after week. The pros and cons seem limitless and opinions abound as to use a tensioner or not and if so why and how. Actaully it has promoted some very innovative designs and isn't that what we like to see?
    Thanks to all of you for your constant input, ideas and opinions. The wider the knowledge base, the better we can promote this hobby. Keep those cards and letters coming. oooops, guess that's an obsolete axiom. But then, so am I :)
    Tom
     
  11. Dan

    Dan Staff
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    LOL Tom.


    I can't find the pic of your tensioner on the Jag.

    Toker, that really is awesome. Nice work
     
  12. BarelyAWake

    BarelyAWake New Member

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    I stole that pic and added it to my thread toker :D

    I r shameless :p
     
  13. xlite

    xlite New Member

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    TENSIONER? Did somebody say TENSIONER? Did I hear the word TENSIONER? :)
     
  14. marts1

    marts1 New Member

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    I would like it a bunch if I could eliminate the tensioner however there is no way my chain will stay on without it Could be becuase I wanted to see how tuff the bike really is after being totally frustrated with a sticky gear cluster, so I checked to see how far it could fly.. I probably caused some wierd twisting damage to the frame. Gotta give myself a little credit as it did take about 6 months of frustration before figuring out what was wrong.
     
  15. stilldoc

    stilldoc New Member

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  16. deacon

    deacon minor bike philosopher

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    I always recommend that you tighten the motor chain so that he wheel will adjust it and use the tensioner on the pedal side of the bike. That was you don't have the pressure on the chain and the tensioner will work just fine. You have to remove links from the chain anyway, so just remove enough to use the drop outs to tighten the chain.
     
  17. deacon

    deacon minor bike philosopher

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    I always recommend that you tighten the motor chain so that he wheel will adjust it and use the tensioner on the pedal side of the bike. That was you don't have the pressure on the chain and the tensioner will work just fine. You have to remove links from the chain anyway, so just remove enough to use the drop outs to tighten the chain.

    and yes I bought a wheel as well...
     
  18. AaronF

    AaronF New Member

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    I changed out the stock bolts on the chain tenisoner with some grade 5 bolts,they work great keeping the chain tenisoner from moving at all :D
     
  19. Dan

    Dan Staff
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    LOL, I have "flight tested" PCs, MBs and all sorts of stuff. Almost always fails but feels so good. (Remember to open windows b4 FTing!)

    I only use a tensioner until the chain is stretched out. Lost my first MB to it sliding into the spokes. I figure it is one less thing that can go wrong. A lot of folks (Great and good MB builders whom I greatly respect and listen to) say this is a bad idea but I have thousands of miles with out em and no problems.
     

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    #19 Dan, Nov 1, 2009
    Last edited: Nov 1, 2009
  20. 2door

    2door Moderator
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    A Few Things I've 'Flight Tested'
    VCR
    Toaster
    Electric Can Opener
    Ink Jet Printer
    Various & Assorted Tools
    1 Ex Girl Friend (Not really, but I wanted to)
    The problem is I always had to go out and pick up the pieces afterward. (except for the girlfriend. She went away on her own)
    Sorry; Off Topic, but you all already know my opinions on tensioners.
    Tom
     

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