Chain Tensioner Chain tensioner problems

GasKicker

Member
Joined
May 28, 2008
Messages
72
I've read a number of threads about these chinese chain tensioners. Judging from some of the pictures I've seen some of you may be running into the same issue I had.
When I first put the chain on, it was too long by about four links. After removing four links the chain still had a some slack in it so I employed the tensioner.
Once chain tension is set there is a fairly radical angle on the chain. This puts extraordinary stress on the tensioner under motor power.

Result:
Tensioner turning into the spokes.
Chain coming loose.
Chain misaligning and coming off sprocket.

My Conclusion: Chain is still too long by about one link. The chain needs to make a more direct line to the bottom of the drive sprocket.

My Problem: I couldn't figure out how to remove just one link, I had to remove two and then the chain is about one link too short for the master link to be inserted.

My Solution: I found something I didn't know existed, but some of you may. It's called a "half link". I got one from my local Tractor Supply for about a buck. Now my chain is almost perfect length.

I still use the tensioner, with the wheel set at it's lowest point but just slightly touching the chain. Reduced stress on the tensioner and no more problems.
 

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BSA

Guest
I completely abandoned my tensioner, just used the rear dropout to tension the chain. Of course some modern bikes do have vertical dropouts: which are a pain.

BSA
 

lildeezul

Member
Joined
Jun 12, 2008
Messages
78
Chain Tensioner Problems.

Chain Tensioner Problems.

Hi, I am hanig terrible problem with my chain.. It creats alot of stress on my tensioner and then it makes the tensioner move and run into the spokes.... Then i drilled a hole through the middle of then tensioner and in the frame, and made another bolt to support to the tensioner, But the chain ill makes the tensioner move, which causes the chain to rub on the tire.

I trying to think of a solution... Also i have the pulley all the way up and the bottom part of the chain is like 1/3 of an inch to hitting to top part of the chain..
I think the chain is to long, i think ima take about 2 links off and then move the rear tire back...

you think that should work
 

azbill

Active Member
Joined
Dec 15, 2006
Messages
3,695
you can bend the long side of the tensioner to make for better alignment
I used 2 channel-lock pliers and bent it approx 1/2"
 

GasKicker

Member
Joined
May 28, 2008
Messages
72
I think shortening the chain would be the best solution. Remember the "half Link". You might need it as I did.
 

ozzyu812

Member
Joined
Apr 6, 2008
Messages
364
My Solution: I found something I didn't know existed, but some of you may. It's called a "half link". I got one from my local Tractor Supply for about a buck. Now my chain is almost perfect length.


I knew half links existed but not for bikes.
Thanks


Hi everyone,

I made a bracket that extends the tensioner so the chain guard will keep the tensioner from turning into my spokes and it works well. I have put 100 miles on mine with this setup and it works great! Here are some pics:

https://motoredbikes.com/media/albums/stabilizer-bracket-for-tensioner.135/

I hope it helps you also. :cool:

Is that full suspension HT set up?
 

James L

Member
Joined
Mar 20, 2016
Messages
33
Hi,

My name is James and i'm here to get help from the pros. Here's my ordeal. I bought a motorized bike from a guy who builds them locally.
I rode the bike less then 4 miles, the first three miles was from his house to mine. It's a Schwinn beach cruiser?

I know very little about these bikes so please bare with me. I bought it just to ride to the local store or to ride to work on occasion as i don't work far from home.
He told me to keep the chain tight, ok that's fine. So after my first ride i put the bike up. Today i decided to ride it around my neighborhood. All was well until the chain came off. I put the chain back on and tightened it like he instructed.

I decided later oh why not go to the store a mile down the road. A little over halfway there the chain popped off again. So here i am pretty much in the middle of nowhere and with no tools. So i called the guy who sold it to me and he came down and tightened the chain. As soon as i thanked him and went to start it again, the same thing happened... The chain popped off. He looked at it again and said it was because the chain tensioner was sliding inwards and outwards and said the bolt in the middle that goes through the frame was bent. And that it was probably from me riding it.... I said i had hardly been anywhere. He said that's what they all say... Mind you i'm extremely honest and have no need to tell stories.

I got it home and removed the "bent bolt" it was not at all bent and completely straight. I re tightened the clamp that holds to the frame and took it for a very brief test ride. Same thing the tensioner was sliding around and loose. This is the first one i have ever owned and have taken wonderful care of it in the less then 24 hours i have owned it.
I was thinking maybe some rubber between the clamps... I also read that i could use a old tire or inner tube. I have looked online at tensioners and would be willing to purchase one. I seen one on this forum and ebay that mounts to the motor and others that are spring tensioned.

The one i like is the one that mounts to the motor but i don't want to mess things up. Any suggestions are welcomed.

Also thanks for allowing me on this forum. I'm attaching a picture of the bike and a link for the tensioner i saw.
 

crassius

Well-Known Member
Joined
Jul 23, 2012
Messages
4,567
when the chain stay is a bit too thin to hold the tensioner, I saw off an inch or so of old handlebar, split it and use it as shims under tensioner - also, be sure to set tension at chains tightest point (roll bike thru a full turn of chain to be sure it doesn't have a point at which it is too tight)
 
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