Replace/Repair/Adjust Chain

cpav13

New Member
May 18, 2008
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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
 

cpav13

New Member
May 18, 2008
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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
 

misteright1_99

New Member
Mar 21, 2008
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Treasure Coast, Florida
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.
 

paul

Well-Known Member
Dec 23, 2007
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Kalamazoo, MI
Re: Replace or Repair Chain?

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

Dave31

Moderator
Staff member
Mar 1, 2008
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Aztlán, Arizona
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




 
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billyjoebigdaddy

New Member
May 29, 2008
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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...
 

nogoodnic

New Member
Jan 29, 2008
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Shelby MI
forum1.freakbikenation.com
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
 

Dave31

Moderator
Staff member
Mar 1, 2008
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Aztlán, Arizona
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


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




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!!
 

Dave31

Moderator
Staff member
Mar 1, 2008
11,204
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Aztlán, Arizona
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.





How to remove link with bench grinder coming soon
 

Norman

LORD VADER Moderator
Staff member
Jan 16, 2008
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pampa texas
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