Having a problem with spring chain tenioner

R

Rusty_Nail

Active Member
I have a crusier frame. I have a spring chain tensioner that keeps coming loose where the arm bolts to the part that bolts onto the motor. It keeps coming loose on me when I get so much as like a half mile down the road. Ive tried a longer bolt, double nutting it and it still comes loose. I dont want to go back to the stock tensioner because they can go into your back wheel. What can I do to remedy this loosening problem? I've also tried blue loctite but it doesnt seem to help much. What else can I try?
 
Rusty_Nail said:
I have a crusier frame. I have a spring chain tensioner that keeps coming loose where the arm bolts to the part that bolts onto the motor. It keeps coming loose on me when I get so much as like a half mile down the road. Ive tried a longer bolt, double nutting it and it still comes loose. I dont want to go back to the stock tensioner because they can go into your back wheel. What can I do to remedy this loosening problem? I've also tried blue loctite but it doesnt seem to help much. What else can I try?
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Only about 10,000 of these are running stock tensioners without them going into the back wheel.
 
The arc tensioner mount is the only fool proof device worth noting. But if you use quality Diamond brand chain of the right length, 1/2 link's if needed. why dick around with a tensioner at all?

Tom
 
The spring tensioners seem like a good idea at first glance. However in real life operation it’s really close to a disaster. It only holds proper chain tension when under acceleration or steady cruse. During starting and deceleration when riding it pulls all the tension out and throws all the slack into the top of the chain.
 
I use a spring tensioner WITH one of those little shims that you put above the chain gear on the motor and it works flawlessly.
 
The best to me has always seemed to be to SET the motor chain with NO TENSIONER, and then to tension the pedal chain, using a derailleur, with the option then of turning the bike into multi-speed, or simply using a one speed tension- about $14.. A motor chain pulled tight in the stays with no tensioner has almost no risk of being thrown off or into the wheel.I used to match chains, but they'd always gradually wear unmatched- the motor chain stretches disproportionally to the pedal chain over time.
 
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