Chain Tensioner are stock chain tensioners even safe?

The biggest problem on my last frame was that the stock tensioner would always get thrown out of place after dumping the clutch to start. This eventually led to the chain stay bending terribly and it couldn't keep a chain on so I had to retire it (as seen in my previous post). In light of that, I had actually been thinking about a similar tensioner for this Schwinn I'm working on. The chain stay was too close to the rim to run the drive chain straight back to the gear, so I cut a chunk out of the chain stay and welded on a new section of steel that held the stay together, but cleared the chain.

I now don't have to run a tensioner since I cut the chain shorter, but I was going to fab a small arm coming off of the stay with one of the same jockey/idler pulley gears to be a guide to help the chain go straight back onto the axle gear.
 
An alternative chain tensioner which could look rather good if it were to be converted to left hand side operation.


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tensioners on Pedal Chain

Hello Fabian,

I really like the tensioners you put on the pedal chain, can please maybe post a better picture of them, and if at all possible the pieces you used to make them? I am having big problems with my pedal chain, it always jumps out of the front cog. More than likely I have problems with alignment as well as how for forward or backward the axle/wheel is on the chainstays (not sure I am using that term correctly. Well in any case, I would greatly appreciate any information on those tensioners/guides as I really need something similar.

Greetings from Colombia!
 
I really like the tensioners you put on the pedal chain, can please maybe post a better picture of them, and if at all possible the pieces you used to make them?

You can purchase both the left hand side chain tensioner and the right hand side chain tensioner from SickBikeParts;

http://www.sickbikeparts.com/catalog/product_info.php?cPath=21&products_id=183

http://www.sickbikeparts.com/catalog/product_info.php?cPath=21&products_id=193


If you have a look at the posts on this page, it will show more detail on the right hand side chain tensioner:

http://www.motoredbikes.com/showthread.php?42865-SickBikeParts-Right-Hand-Side-Chain-Tensioner-idler-wheel-options/page3&highlight=hand+side+chain+tensioner





this video details the flanged options for the right hand side chain tensioner:










I am having big problems with my pedal chain, it always jumps out of the front cog.

It's a common problem that is completed fixed when installing a SickBikeParts chain tensioner, and then improving on the reliability of the device by fitting it with flanged idler wheels.




To give the shift kit good stability in the bicycle frame (to eliminate torque induced chain alignment issues) you "will" need to make this modification to the shift kit:

http://motorizedbikeforum.the-talk.net/t353-additional-stability-for-the-sick-bike-parts-shift-kit
 
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