more chain problems

Discussion in 'Motorized Bicycle General Discussion' started by matt167, Jul 5, 2009.

  1. matt167

    matt167 New Member

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    I finally got around to tinkering with my Mb again.. made a chain tensioner bracket simmilar to what 2door has except mine is bolted to the chainstays with 6mm bolts, and it uses a TSC tensioner, just without the spring.... the rear sprocket is a rag joint sprocket but it's running completly true and it's tight... problem comes with tension on the chain.. it will start to jump teeth and ride ontop them if it's got tension on it.. let the tension off and it tracks perfectly... any idea's?
     
  2. Creative Engineering

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    Matt,

    Can you post pics?

    Jim
     
  3. 2door

    2door Moderator
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    Matt,
    First question is, are you running the kit supplied 415 chain? I've seen twists and kinks in some of them. I've seen rollers that didn't roll and chain that had a natural twist in it that I couldn't get out. It's the first thing I replace. Look for a good quality #41 chain available at Ace Hardware, Tractor Supply and Grainer to name a few.
    The next thing is chain alignment. Is your tensioner guiding the chain onto the rear sprocket correctly? The tensioner wheel MUST be aligned with the chain path and not pulling the chain to either side. Get back to us with some pictures and details.
    Tom
     
  4. matt167

    matt167 New Member

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    yea, I'm using the kit supplied 415 chain. I used nuts to space the tensioner slider away from the spokes and allign it with the sprocket/chain.. I'll get some pics tomorrow..

    I'll probably get some #41 chain.. after all this chain has been beat up a bit from the other tensioner mishap's I'v had..
     
  5. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Sounds like you may have bent a few links.
     
  6. drhofferber

    drhofferber New Member

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    with that truck supply roller and bracket on a setup like 2door does, you have to tweak that bracket to get it lined up right...that 41 chain is going to give you some grace,but you must watch for clearance between chain and tire...also if you are using the truck supply bracket and roller, you must use a set screw on the bracket so if it moves it doesnt go all the way down....than you will have a chain problem...all in all, good idea but pay attention to application...Dennis
     
  7. matt167

    matt167 New Member

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    It's all set up and alligned perfectly. the only thing I didn't do was use a set screw to hold it in place.. I just tightened it in the down position. to adjust tightness, I just move it up the slot instead of rotating the tensioner into the chain
     
  8. matt167

    matt167 New Member

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    probably.. I'm gonna pull it off today and see how mangled it really is.
     
  9. drhofferber

    drhofferber New Member

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    good for you...i no my prototype needs the bracket bent alittle...it attachs to the frame and is simular to 2doors...probably a old generator bracket would work fine...every bike is different...when you get it finished give us a pick...tensioners are a good topic on the forum...have fun...Dennis
     
  10. 2door

    2door Moderator
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    Dennis,
    That is an excellent idea. Find the top generator or alternator adjusting bracket. The most common you'll find will have a 3/8" slot in it and most tensioner/roller blade/skate board wheels use a 5/16/ bolt but they make bushings to take up that difference. Why didn't I think of that before I spent the time milling a slot and bending my bracket:) I think, if I scrounge through some of my old hot rod stuff, I have a chrome one.
    Good idea.
    Tom
     
  11. drhofferber

    drhofferber New Member

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    put everything togeather ...cut the bracket so it fits inside the frame...have your roller and bracket on it...set it correctly for alinment and tac it in place...than finish welding it...wala......what i've seen of two doors, it would be simular and with truck supply setup it would be great...i.m working on the same thing...i like that setup....i've told 2door that was a great tensioner he puts on his bikes...ok...have fun...Dennis
     
  12. matt167

    matt167 New Member

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    sorry, I havn't got pics yet.. free time has lately been working on my '51 Chevy..... did get the new #41 chain and pulled off the old 415... looked straight down at the old chain, and not only is it twisted a bit, it's mangled.. about the middle of the chain, links are severely bent. probably 15 links are effected..
     

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