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Looks great ,  but all the one's I've seen have guides on side's of wheel to keep chain centered and in ,just to be safer I'd think about a loop (center of wheel looping over chain to other side center of wheel  Ya-No.
Then the worse that can happen is you fry your balls  bearings 
1977 CB750 F2 Super Sport
<LET THOSE WHO RIDE DECIDE><RIDE TO LIVE-LIVE FOR JESUS>
Native American from central Cal, Kickstand UP in S.W.Missouri,
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You need to mount it, so that it will not hit that cross tube when the chain takes up slack. Remember every time you let off the throttle, the bottom side of the chain becomes tensioned. However I would have just welded some brackets on the front, or rear of that tube, and mounted the wheel solid, so that it would just keep the chain from eating the tube if it gets loose.
BTW What in the hell is that Comstar doing on that bike?   TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Pat-Yes-it will hold up? or Yes- I need to go back to the drawing board   Piute-I thought about that centering thing,too( not the ball frying ). It's pretty close to the front sprocket,hopefully it stay straight. At least I hope  Good idea on the loop Doubting Tools-  there is a travel limiter to keep the wheel from hitting the frame tube when the chain tightens-good eye as always! I dig the Comstar,whats up? No,#@(! No I'm not running that wheel on this bike. The spoke is at the shop waiting for the stupid odd ball Harley tube nobody had in town. H-D dealership didnt have one either You kidding me?Offset valve with no mounting nuts. Just for fun,you oughta go in a H-D dealership and ask for a 530 master link. I blew the poor guys mind.Never heard of one. All belts in there now. This town sucks.I can buy skate board wheels ,but not motorcycle inner tubes.
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yes it will hold..ive seen those before..i think biltwell used to sell them..or lowbrow customs i think...
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I do not think it will work very long at all.
I would just have put a piece of hard plastic (UHMW) on the bottom frame member.
I have tried chain tensioners before and they make noise.
They also wear out very fast. I have used ones with needle rollers made just for the purpose.
On a Roadstar Adventure.
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Administrator
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I think your probably right Lucky. Shoulda just kept it simple. I'm cool with the wheel, but not sure if I trust the bearings. I gotta plan be for that bearing, though.
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The skateboard wheel will never take it. The rubber will wear out in no time, and it will also cause a lateral force to be applied to the chain causing bad alignment.
You could try an industrial idler sprocket like this one. http://www.grainger.com/Grainger/Ball-Bearing-Sprocket-Idler-5A552 Has a robust bearing built right in.
The one linked does not match your chain pitch, but these are proven in industrial automation. If it were me, I'd use one that has ball bearings rather than needle. For industrial purposes, chains generally run much slower. The ball bearing style will be more suited to speed this thing will turn at. You could always do a little math to calculate how fast the idler will be turning. They probably have a max rpm rating...
Matt
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So you have no other way to adjust chain tension except using a tensioner?
78 CB750F3 Super Sport
Austin, TX
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Why wouldn't it hold if you just make sure it is there to keep the chain from slapping the frame and not to keep the chain super tense? Like if you drop the height of it just to the point where it isn't hitting the frame. Then the problem is keeping it on the wheel, so if you do like a boxed loop that consists of pin rollers would that work? Just tossing ideas out there
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Administrator
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That is what I was suggesting. Just mount it to the cross tube, to keep the chain from eating it up.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Ah, gotcha Tools, was a little confused by what you said but I understand now
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Administrator
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Keeping the chain on the wheel is not a problem . The wheel sticks out past the chain nearly half an inch on each side. Thats not a problem. Wheel is not under a ton of tension either. it can go further if it needs to. I guess I worded my question wrong. I was just wondering if the wheel and bearing would actually hold up to thousands of miles of riding. Pat said hes seen it done sooo....proof is in the pudding,right?
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Administrator
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Probably not :) I know quys have used them. But what works at a bike show doesnt always fare so well on the road. That was my concern. I know my mount is ok. Ill give the wheel a few trips close to home at low speeds ang from there. Originally planned on doing just what Tools said,but figured id just do something fancy. Was rained in and bored.lol
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Administrator
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It looks like something that would be on a dirt bike. You know your chain does not need that much slack.
TOOLS
Life is not about the number of breaths, you take, but the moments that take your breath away.
I don't have an anger problem. I have an idiot problem. Hank Hill
Never confuse education for intelligence.
Happiness is a belt fed weapon.
I just can't imagine what could go wrong.
No fire? No explosions? So whats the point of your story?
Those who are too smart to engage in politics are punished by being governed by those who are dumber. ~Plato
It couldn't be done, but the darn fool didn't know it, and did it anyway.
We all got problems. Ksharp
I like vintage bikes because they take me away from the clutter of technology that I work with everyday and back to a simpler time of mechanical elegance and simplicity.. "ninadm"
Darkwing Duck: The worst part of public transportation is the Public.
"That is awesome shit there" Re-Run
"Fear nothing, attack everything" Eric Berry
" Oh, you read that on the internet? Clearly it IS a massive problem. Of course it CAN’t be normal operation."
1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
1982 Honda XL 80
South of Eden (Kansas City MO)
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Administrator
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Matt Story wrote
The skateboard wheel will never take it. The rubber will wear out in no time, and it will also cause a lateral force to be applied to the chain causing bad alignment.
You could try an industrial idler sprocket like this one. http://www.grainger.com/Grainger/Ball-Bearing-Sprocket-Idler-5A552 Has a robust bearing built right in.
The one linked does not match your chain pitch, but these are proven in industrial automation. If it were me, I'd use one that has ball bearings rather than needle. For industrial purposes, chains generally run much slower. The ball bearing style will be more suited to speed this thing will turn at. You could always do a little math to calculate how fast the idler will be turning. They probably have a max rpm rating...
Matt
Thanks for the link Matt. Do you mind explaining the lateral force issue to me? Not sure I'm following on that one-Thanks
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Hoko wrote
So you have no other way to adjust chain tension except using a tensioner?
No,It has adjustment slots for the chain just like a stock bike does. The chain just drags a cross tube on the frame. This was an attempt to keep the chain off that tube.
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Administrator
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TOOLS1 wrote
It looks like something that would be on a dirt bike. You know your chain does not need that much slack.
TOOLS
Never saw one on a dirtbike Chain length is a funny thing. If I move the chain up one tooth more on the sprocket it is already so tight it just rides that cross tube. I wasn't shooting for a bunch of slack,that's just how it worked out.
I never thought a question about a bearing could create this many questions. Thanks for the input guys.
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