Author Topic: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)  (Read 11932 times)

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Offline Phil

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #125 on: October 22, 2019, 01:31:22 pm »
I've been following the saga of CB750 primary chains for over 10 years now. Back then I bought a pair of (astronomically priced) chains from M2 (?) in the US. I'm convinced modern chains are hugely superior to those in 1969. I had a CB750 in 1970 and had to change the huge and heavy (530?) drive chain every 3 - 4000 miles. It's amazing to think that a 300 BHP Moto GP uses a 420 chain. I believe the chains I bought from M2/USA are Regina chains so I'm confident they can handle the 90 BHP my race engine will make. I listen closely to what Brent (V&H) says about chains and have fitted his cam chain guides in my 1100F race bike engine. Its very interesting to follow this thread because, I've been collecting the parts for my CB750 SOHC race engine for 10 years and now I'm finally putting it together.

I bought the Cycle X primary chain tensioner some years ago - but now see the recommend the standard tensioner?? Bit worrying ...

Offline Phil

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #126 on: October 22, 2019, 01:36:22 pm »
Is this any good? It's the CycleX part. Is anybody using it or should I wait for Messner Moto?

Offline Skoti

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #127 on: October 23, 2019, 12:09:36 am »
Is it safe to re-rivet a previously riveted chain link?
Motorcycling is life, anything B4 or after is just waiting.

Honda CB750F1 1976
BMW R1150RT 2002
Norton Commando 850 Roadster 1974
Jawa 350 Blue Style 1992

Offline MessnerMoto

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #128 on: October 23, 2019, 01:43:56 am »
Is it safe to re-rivet a previously riveted chain link?

yep. Thats how all HD chains are made.

Search the internet there are cheap tools for breaking the chain and reriveting... U need tool for modern cam chains... because our HD chain(for cb750) is actually the cam chain for some of audi/vw cars.

https://www.amazon.com/Chain-Breaker-Breaking-Rivet-Riveting/dp/B01M4NHK0H

I've been following the saga of CB750 primary chains for over 10 years now. Back then I bought a pair of (astronomically priced) chains from M2 (?) in the US. I'm convinced modern chains are hugely superior to those in 1969. I had a CB750 in 1970 and had to change the huge and heavy (530?) drive chain every 3 - 4000 miles. It's amazing to think that a 300 BHP Moto GP uses a 420 chain. I believe the chains I bought from M2/USA are Regina chains so I'm confident they can handle the 90 BHP my race engine will make. I listen closely to what Brent (V&H) says about chains and have fitted his cam chain guides in my 1100F race bike engine. Its very interesting to follow this thread because, I've been collecting the parts for my CB750 SOHC race engine for 10 years and now I'm finally putting it together.

I bought the Cycle X primary chain tensioner some years ago - but now see the recommend the standard tensioner?? Bit worrying ...

not sure but that looks like ordinary PA6... will not last long.... If you follow up this thread I had to redo my primary tensioner guides because material supplier gave me pa6 instead of pa46 

Offline RAZZ

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #129 on: January 11, 2021, 01:29:28 pm »
Hi is there any user experiences with the Messner cam and primary tensioners ? I have a set i Will tend to use in a 900 ccm engine build


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Offline Finnigan

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Re: High Performance PRIMARY Chain tensioner for CB750(MessnerMoto)
« Reply #130 on: January 11, 2021, 02:23:01 pm »
I missed out on this and really want a set if anyone has one they can part with.