more chain problems

matt167 · #1 07-05-2009, 09:15 PM

I finally got around to tinkering with my Mb again.. made a chain tensioner bracket simmilar to what 2door has except mine is bolted to the chainstays with 6mm bolts, and it uses a TSC tensioner, just without the spring.... the rear sprocket is a rag joint sprocket but it's running completly true and it's tight... problem comes with tension on the chain.. it will start to jump teeth and ride ontop them if it's got tension on it.. let the tension off and it tracks perfectly... any idea's?

Creative Engineering · #2 07-05-2009, 10:10 PM

Quote:

Originally Posted by matt167

I finally got around to tinkering with my Mb again.. made a chain tensioner bracket simmilar to what 2door has except mine is bolted to the chainstays with 6mm bolts, and it uses a TSC tensioner, just without the spring.... the rear sprocket is a rag joint sprocket but it's running completly true and it's tight... problem comes with tension on the chain.. it will start to jump teeth and ride ontop them if it's got tension on it.. let the tension off and it tracks perfectly... any idea's?

Matt,

Can you post pics?

Jim

**2door** · #3 07-05-2009, 10:44 PM

Matt,
First question is, are you running the kit supplied 415 chain? I've seen twists and kinks in some of them. I've seen rollers that didn't roll and chain that had a natural twist in it that I couldn't get out. It's the first thing I replace. Look for a good quality #41 chain available at Ace Hardware, Tractor Supply and Grainer to name a few.
The next thing is chain alignment. Is your tensioner guiding the chain onto the rear sprocket correctly? The tensioner wheel MUST be aligned with the chain path and not pulling the chain to either side. Get back to us with some pictures and details.
Tom

matt167 · #4 07-05-2009, 11:56 PM

yea, I'm using the kit supplied 415 chain. I used nuts to space the tensioner slider away from the spokes and allign it with the sprocket/chain.. I'll get some pics tomorrow..

I'll probably get some #41 chain.. after all this chain has been beat up a bit from the other tensioner mishap's I'v had..

**Bikeguy Joe** · #5 07-06-2009, 08:27 AM

Sounds like you may have bent a few links.

drhofferber · #6 07-06-2009, 08:52 AM

Quote:

Originally Posted by Bikeguy Joe

Sounds like you may have bent a few links.

with that truck supply roller and bracket on a setup like 2door does, you have to tweak that bracket to get it lined up right...that 41 chain is going to give you some grace,but you must watch for clearance between chain and tire...also if you are using the truck supply bracket and roller, you must use a set screw on the bracket so if it moves it doesnt go all the way down....than you will have a chain problem...all in all, good idea but pay attention to application...Dennis

matt167 · #7 07-06-2009, 12:17 PM

It's all set up and alligned perfectly. the only thing I didn't do was use a set screw to hold it in place.. I just tightened it in the down position. to adjust tightness, I just move it up the slot instead of rotating the tensioner into the chain

matt167 · #8 07-06-2009, 12:19 PM

Quote:

Originally Posted by Bikeguy Joe

Sounds like you may have bent a few links.

probably.. I'm gonna pull it off today and see how mangled it really is.

drhofferber · #9 07-06-2009, 02:28 PM

Quote:

Originally Posted by matt167

It's all set up and alligned perfectly. the only thing I didn't do was use a set screw to hold it in place.. I just tightened it in the down position. to adjust tightness, I just move it up the slot instead of rotating the tensioner into the chain

good for you...i no my prototype needs the bracket bent alittle...it attachs to the frame and is simular to 2doors...probably a old generator bracket would work fine...every bike is different...when you get it finished give us a pick...tensioners are a good topic on the forum...have fun...Dennis

**2door** · #10 07-06-2009, 03:42 PM

Quote:

Originally Posted by drhofferber

good for you...i no my prototype needs the bracket bent alittle...it attachs to the frame and is simular to 2doors...probably a old generator bracket would work fine...every bike is different...when you get it finished give us a pick...tensioners are a good topic on the forum...have fun...Dennis

Dennis,
That is an excellent idea. Find the top generator or alternator adjusting bracket. The most common you'll find will have a 3/8" slot in it and most tensioner/roller blade/skate board wheels use a 5/16/ bolt but they make bushings to take up that difference. Why didn't I think of that before I spent the time milling a slot and bending my bracket

I think, if I scrounge through some of my old hot rod stuff, I have a chrome one.
Good idea.
Tom