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SOHC.co.uk Forums => CB750 => Topic started by: El__burro on August 03, 2015, 12:52:11 AM

Title: Chain touching
Post by: El__burro on August 03, 2015, 12:52:11 AM

Good morning,
I am trying to take the bike out for the first ride,  unfortunately I have a problem with the centre stand touching the chain.
What's at fault here, the chain or the stand?
How do I fix this?

Thanks
El__burro(http://images.tapatalk-cdn.com/15/08/02/f64ecd44704283d6646ca9887a3e1c03.jpg)(http://images.tapatalk-cdn.com/15/08/02/1a8d3af3bb88b894542dc4a7420779e8.jpg)

Title: Re: Chain touching
Post by: Lobo on August 03, 2015, 12:56:51 AM

The exhaust system has a 'rubber bumper' on it: ie fit the exhaust & I think you'll be sorted.

Simon

Title: Re: Chain touching
Post by: Bryanj on August 03, 2015, 06:50:41 AM

If you have a 4 into 1 on the other side fabricate a stand stop and fit it to the footrest bolt, a piece of dexion shelving bracketry is ideal

Title: Re: Chain touching
Post by: Spitfire on August 03, 2015, 08:42:33 AM

Yes I had a bit of inch by eight flat bar with a rubber bump stop attached to stop the stand riding up into the chain.

Cheers

Dennis

Title: Re: Chain touching
Post by: El__burro on August 03, 2015, 01:32:17 PM

Yes I have a 4-1 exhaust on the other side.
So the stand needs to clear.
I'll think of something.

Thanks
El__burro

Title: Chain touching
Post by: El__burro on August 04, 2015, 11:21:13 PM

(http://images.tapatalk-cdn.com/15/08/04/01387b633b265ed57e34ab1f36d364d1.jpg)(http://images.tapatalk-cdn.com/15/08/04/ca285ade0b7dd1d2fda1a95d5b6550ac.jpg)
Done it!

Gone a different route and it works brilliantly.
The result is great as you can't see a thing or a bar.

Although the spot weld aren't that "good looking"  they do the trick brilliantly

Regard
El__burro(http://images.tapatalk-cdn.com/15/08/04/a95cde73eaa5a5e65cf51cce04b6ab37.jpg)

(http://images.tapatalk-cdn.com/15/08/04/f2d03ef21f95fe27e04521a1f648a765.jpg)

Title: Re: Chain touching
Post by: mike the bike on August 07, 2015, 08:20:54 PM

That's a good solution,  although the rubber stop also prevents the centre stand retracting with a clang.

Title: Re: Chain touching
Post by: Chris400F on August 10, 2015, 09:14:41 AM

Looks quite a neat solution in theory but although I'm not a mechanical engineer I have concerns.
Your scheme means metal-to-metal contact over a very small area at a point not designed for this. Possibly at a single point if welds are not exactly the same height both sides.
Principle of leverage also means that the force of the return spring is magnified as the weld area is much closer to the stand pivot point than the spring.
Concern may be unfounded but I suspect that over time something may wear or fail, either the weld or the frame tube where contact is made.
Personally I wouldn't take the risk, I'd go for a bracket with a rubber stop as others have already suggested.

Title: Re: Chain touching
Post by: El__burro on August 10, 2015, 09:30:10 AM

True, good point.
thanks
 :-\el__burro