Replace/Repair/Adjust Chain

Discussion in 'Motorized Bicycle General Discussion' started by cpav13, May 24, 2008.

  1. cpav13

    cpav13 New Member

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    Hello All,

    I'm the guy with the $15 motor bike that I bought at a garage sale last week. I keep snatching defeat from the jaws of victory, and I had a gumption killing moment today I'm seeking advice on.

    I realized that the reason the last guy got rid of the bike was because he had stripped out the engine mounts. I got impatient, and started it before I fixed the mount, and it jumped off the frame. It looked OK, so I spent the morning re-tapping the engine mounts (a cool thing to learn how to do, I must admit). I got it all back together and found out that when it jumped off of the frame I broke one of the links. Then, when inspecting the damage, I lost the master link (grrrrrr).

    Are the chains with these 50cc motors basically standard? I know I can order a master link from zoombicycles.com, but then I'd still need the replacement link. Anyone know a place I can get one of those? Should I just buy a new chain? What do you all think?

    Thanks!

    Cory
     
  2. cpav13

    cpav13 New Member

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    Re: Replace or Repair Chain?

    Hey, Now I'm replying to my own post!

    I scrolled down the page, read a thread on chains, and saw a related threads section. Learned a fair amount.

    Still wondering though, anyone know what kind of shop carries these 415 sized chains besides online retailers? Where would I open the yellow pages?

    Is there a way to search these threads?

    Thanks again!

    Cory
     
  3. misteright1_99

    misteright1_99 New Member

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    Re: Replace or Repair Chain?

    You can go to the main page and search threads by keywords. I have replaced the chain with #41 chain. I got mine at Tractor Supply Co., 10 feet for under $15. and also a pkg of 5 masterlinks for another $2.
     
  4. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Re: Replace or Repair Chain?

    Tractor Supply Co.
    #41 Chain.
    Mister right is right, mister.
     
  5. paul

    paul Active Member

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    Re: Replace or Repair Chain?

    i agree on the #41 chain. i think they are made of stronger metal and will last longer also
     
  6. billyjoebigdaddy

    billyjoebigdaddy New Member

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    Re: Replace or Repair Chain?

    I'm glad I found this post. I'm heading to the tractor supply to get a #41 chain for 12.88
     
  7. misteright1_99

    misteright1_99 New Member

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  8. Dave31

    Dave31 Moderator
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    Re: Replace or Repair Chain?

    I get my chain for a little over $4.00 from Bearing-Belt & Chain, Inc. 430 W. 22nd Street 520-792-1231...They used to be a sponser of mine and they still hook me up with 10ft and a handfull of connecter link's...

    Stock Chinese chain on Left...New #41 on Right

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    #8 Dave31, Jul 7, 2008
    Last edited: Jul 7, 2008
  9. Dave31

    Dave31 Moderator
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  10. billyjoebigdaddy

    billyjoebigdaddy New Member

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    Re: Replace or Repair Chain?

    I went to get a #41 chain. Did not work for me. My old chain was metric and #41 is standard. It is much wider than the chain that came with my kit. And it would walk on the sprocket. Glad I didn't take off on a long trip. The chain walked into the frame of my bike...ouch...
     
  11. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Re: Replace or Repair Chain?

    What kind of bicycle motor kit do you have?
     
  12. Dave31

    Dave31 Moderator
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    Re: Replace or Repair Chain?

    Yes, I too would like to know :)
     
  13. nogoodnic

    nogoodnic New Member

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    Re: Replace or Repair Chain?

    I would guess that you have alighment issues. the width of the chain shouldn't matter if your sproocket and motor sprocket are alighned. Some of the kits come stock with a 415 which is even wider, this is what I use. I think I have one more 415 left then I will switch to the 41...Kelly
     
  14. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

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    Re: Replace or Repair Chain?

    I think you have alignment issues too.
     
  15. Dave31

    Dave31 Moderator
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    Re: Replace or Repair Chain?

    Adjusting the chain

    You want to have at least 1/2-3/4 inch of slack in your chain. To tight is just as bad as too loose.

    With a tape measure...measure from the bottom chain stays to the top of the chain (the drive part). Alway's measure from the same place...I use my chain tensioner as a guide (about a inch and half away from it) Measure in the middle between the sprocket's.

    Measure the chain first
    [​IMG]

    Now with your finger pull up on the top chain (drive part) until all slack is gone...As you can see I have about a inch of slack...too much
    [​IMG]

    [​IMG]

    Use your tensioner to adjust..If you do not have enough adjustment on your tensioner...moving it back (towards rear sprocket) should give you a little more adjustment. If you can't do that...you may have to remove a link. If you remove a link, you may also need to move the tensioner back towards the engine. BE SURE!! removing a link will not make your chain too short!!
    [​IMG]
     
  16. Dave31

    Dave31 Moderator
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    Re: Replace or Repair Chain?

    Here it is adjusted to 3/4 inch...The measurements are not exact in the pic's...it was too dificult to hold camera tape measure and chain all at the same time. But it should give you a good ideal how to go about it.

    [​IMG]

    [​IMG]

    How to remove link with bench grinder coming soon
     
  17. Norman

    Norman LORD VADER Moderator
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    Re: Replace or Repair Chain?

    I want to chime in and say rotate your rear wheel and find where the chain its at its tightest and use that point to set the slack in your chain. I run mine more on the loose side than tight.
    Norman
     
  18. Dave31

    Dave31 Moderator
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    #18 Dave31, Jul 18, 2008
    Last edited: Jul 18, 2008

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