Chain Tensioner Chain tensioner dilema

[scorpio]

My chain stay is smaller in diameter than the chain tensioner bracket. I can get the chain tension perfect, but when I peddal with any force the bracket gets pulled into the spokes. I have searched to see what others have done and did not find any thing. I was thinking of using something like a handle bar/stem shim and see if that works.

If any of you have had similar problems please let me know what you did to overcome this.

Thanks
Scorpio

 

[impression]

you could always wrap the area in firm rubber to increase it's diameter and also help reduce vibrations

 

[scorpio]

any specific type of rubber. The inner tube trick does'nt work
the bracket still spins on the chain stay

 

[impression]

the bracket still spins on the chain stay

what do you mean by this ?


from what i understand the 'tube' part of the bike in which you intend to mount the tensioner on hasn't got the diameter thickness required for the tensioner to be held on securely...

So use some 'hard' neoprene rubber from your local hardware store.Wrap the rubber around the frame tube area of where you want to mount the tensioner. Place the tensioner over the rubber and screw the bolts/nuts tightly

 

[azbill]

I have seen people use a self drilling screw thru the bracket and tube to solve this
just a suggestion

 

[srdavo]

pics man!!!

maybe fab a new clamp side of the bracket, with less roundness..... Like none. a flat piece of metal, instead of a curved one? with longer bolts....buy good bolts.
just another suggestion & a coincidence... I made one like this today..... didn't take pics...sorry

 

[eltatertoto]

hey, if i can find a pic ill show ya what i did with my stingray. mabey itll give ya some ideas. ill edit this post if i find em.

edit pics added. i just flattened it to fit on the box shape of the frame then i drilled/tapped some holes and put 2 screws to make sure it wouldnt move.

 

[bluegoatwoods]

Tapping and bolting sounds like a good idea.

But if you want to do it quicker, then how about a piece of garden hose as a shim?

 

[scorpio]

Thanks for all the tips guys! I just returned from Lowe's bought a 1' piece of 1/4' thick black heating hose $1.38. It is the perfect size and the problem is solved. Same idea as Impression and Bluegoatwoods suggested. Now I wish I had used this when I mounted the engine to the frame! I definately will on the next build.

Thanks again for you ideas and help.

Scorpio

 

[impression]

DO NOT use rubber on the mounts for happytime/chinagirl engines. I stuffed a really good engine that done 40mph because of shearing mounting bolts so many times