Author Topic: Heavy Duty primary chains from M3... (Read 22752 times)

MRieck · « **on:** January 16, 2009, 02:27:20 pm »

http://cgi.ebay.com/ebaymotors/CB750-Cafe-Honda-CR750-AHRMA-Racing-Primary-Chains_W0QQcmdZViewItemQQ_trkparmsZ66Q3a4Q7c65Q3a10Q7c39Q3a1Q7c240Q3a1318QQ_trksidZp3286Q2ec0Q2em14QQhashZitem190280678127QQitemZ190280678127QQptZMotorcyclesQ5fPartsQ5fAccessories

I'm curious as to what he will be selling these for. Guess I'll have to call and see.

mystic_1 · « **Reply #1 on:** January 16, 2009, 02:54:26 pm »

Woah! Nice.

mystic_1

MCRider · « **Reply #2 on:** January 16, 2009, 03:19:24 pm »

Way cool! I did my part.

Retro Rocket · « **Reply #3 on:** January 16, 2009, 03:23:26 pm »

Might have to get me one of those.....

Mick

MCRider · « **Reply #4 on:** January 16, 2009, 03:25:33 pm »

Quote from: retro rocket on January 16, 2009, 03:23:26 pm

Might have to get me one of those.....

Mick

Takes two.

Retro Rocket · « **Reply #5 on:** January 16, 2009, 03:44:26 pm »

I'm surprised one of these parts companies doesn't affiliate with this site, they would be able to sell heaps of parts and probably offer a discount to forum members. I am a member of a great guitar forum where this happens......works for me....

Mick

bwaller · « **Reply #6 on:** January 16, 2009, 05:49:58 pm »

Sounds like what the Dr. ordered Mike. Besides it only took forty years to source.

mick750F · « **Reply #7 on:** January 16, 2009, 06:08:37 pm »

Holy torque load Batman! The supply is "limited"...one of the greatest sales lines ever. I'd have to ask how limited...meaning do I have to act now...or limited to the first 5,000 people that ask about it. Seriously though...how limited? Are these rare NOS chains that been stashed away somewhere since the '70's or even if they are, is there something else out there comparable which would make them less "limited". I'm just asking...because I certainly don't know. Actually, I'm guessing that if Mr. Rieck has pointed these out that they must be something kinda special.

Might have to pony up for one....

Mike

scondon · « **Reply #8 on:** January 16, 2009, 06:28:37 pm »

Buy me a set while yer at it, Mike

Terry in Australia · « **Reply #9 on:** January 16, 2009, 06:37:22 pm »

I just bid on them, not that I think I need them, but was immediately outbid, so I guess someone really wants 'em!

MRieck · « **Reply #10 on:** January 16, 2009, 06:44:09 pm »

Quote from: scondon on January 16, 2009, 06:28:37 pm

Buy me a set while yer at it, Mike

Of course Sean....it was my first reaction.

Jerry Rxman Griffin aka MuthaF'er · « **Reply #11 on:** January 16, 2009, 07:16:56 pm »

Mike,

Let's go for the volume discount. Mark is really proud dollar wise of his stuff. I'll keep my ass puckered up waiting for an answer.

Terry in Australia · « **Reply #12 on:** January 16, 2009, 10:53:34 pm »

I wonder if that's just Regina or Tsubaki simplex primary chain?

voxonda · « **Reply #13 on:** January 17, 2009, 01:35:54 am »

Quote from: Terry in Australia on January 16, 2009, 06:37:22 pm

I just bid on them, not that I think I need them, but was immediately outbid, so I guess someone really wants 'em!

Hey Terry, that must have been me! But think there is a third party involved, I'm out. Like these chains at least they are stronger then the OEM.

Cheers.

SteveD CB500F · « **Reply #14 on:** January 17, 2009, 02:26:07 am »

eBay Username xref anyone?

http://forums.sohc4.net/index.php?topic=612.0

lordmoonpie · « **Reply #15 on:** January 17, 2009, 02:44:44 am »

Hmmmm, very interesting that M3 have for a few years, been expounding the virtue of the honda goldwing drive conversion to use a hy-vo primary with an A crank, including heavy duty rubbers and sale of the hy-vo chains....and now we find it didn't actually work at all and failed as regularly as the standard chains?!?!?

Is it just me or has there really been a bit of selling the "emperor's new clothes" going on....? And if that is really the case.....how do you know that these *really* are the solution now?

Caveat emptor!

Soos · « **Reply #16 on:** January 17, 2009, 04:20:59 am »

A good salesman can sell ice cube trays to a eskimo.

Fear can sell anything. Just talk to a home alert system about fear... you might just buy one before he leaves.
If they can put fear in your mind about the "other" option then they might net more units sold.
more sold=more profit.

l8r

Soos · « **Reply #17 on:** January 17, 2009, 04:22:22 am »

And who is out there to refute his claim?

Whether he is lying or not... dunno.
never tried a A crank conversion in a F or K motor.

l8r

lordmoonpie · « **Reply #18 on:** January 17, 2009, 05:18:57 am »

Well I should find out myself in the next few months whether it's true or not

voxonda · « **Reply #19 on:** January 17, 2009, 05:48:13 am »

Quote from: lordmoonpie on January 17, 2009, 05:18:57 am

Well I should find out myself in the next few months whether it's true or not

I, for one, am very interested in the outcome of your endeavour! Think I keep the originals for now and hope they will last.

MRieck · « **Reply #20 on:** January 17, 2009, 05:54:20 am »

Quote from: lordmoonpie on January 17, 2009, 02:44:44 am

Hmmmm, very interesting that M3 have for a few years, been expounding the virtue of the honda goldwing drive conversion to use a hy-vo primary with an A crank, including heavy duty rubbers and sale of the hy-vo chains....and now we find it didn't actually work at all and failed as regularly as the standard chains?!?!?

Is it just me or has there really been a bit of selling the "emperor's new clothes" going on....? And if that is really the case.....how do you know that these *really* are the solution now?

Caveat emptor!

I was waiting for this post as I know you have invested a lot of time and money in the conversion. I wonder if the weight of the Hyvo chain is its undoing especially when loaded and unloaded rapidly....I'd imagine it can overwhelm the tensioner. I always thought the tensioner was the weak link in the conversion setup....not so much the chain. That being said these heavy duty chains certainly weigh more than the stock pieces....is it a good idea to beef up the tensioner for these units?
I have no doubt these new chains are much stronger than the OEM pieces. It is like comparing an OEM cam chain to a Tsubaki or, even more so, an old RK chain. It does appear to be "backwards engineering". Spend all the time and effort to develop a different primary system only to return to the original setup but with improved parts. It is certainly not the first time it has happened that's for sure.
Lord...I wouldn't worry about failure. I still believe the Hyvo set up is a much more stout means of power transfer than the OEM pieces. I would think M3 was using the old CR750 chains at one point so maybe that is more the comparative to the Hyvo. I would keep an eye on the tensioner unit. Anyway... after all your time and investment you're only going to be doing parade laps and such....right

simon#42 · « **Reply #21 on:** January 17, 2009, 06:28:04 am »

Quote from: Terry in Australia on January 16, 2009, 10:53:34 pm

I wonder if that's just Regina or Tsubaki simplex primary chain?

i was just thinking the same thing , if we knew who made it we could buy a roll between us !

MRieck · « **Reply #22 on:** January 17, 2009, 06:44:13 am »

Quote from: simon#42 on January 17, 2009, 06:28:04 am

Quote from: Terry in Australia on January 16, 2009, 10:53:34 pm
I wonder if that's just Regina or Tsubaki simplex primary chain?

i was just thinking the same thing , if we knew who made it we could buy a roll between us !

He said European so Regina is in the picture.

City Boy · « **Reply #23 on:** January 17, 2009, 09:28:55 am »

Happy New Year folks.My view on this issue is that one must take the sellers word with a large grain of salt.I have the CR chains in my unit.They work fine.Having said that,I won't deny a breakage prob.but in all my years have not seen this with CR or stock chains.I have seen them so worn though that they have nearly ground their way through the cases,but didn't break!As to the hy-vo not liking hi rpm,what about the dohc units,including my 1100F,that routinely see higher revs than most sohc units?The real problem,as I see it,if in fact it is a "problem",is a lack of positive tension on the chain by the tensioner.The "fix is an adjuster bolt acting on the tensioner and a window of some sort to view when all slack has been removed.That's my rant for the day as I leave to shovel snow for the umteenth time since the new year. Rock On

lordmoonpie · « **Reply #24 on:** January 17, 2009, 09:34:42 am »

Quote from: MRieck on January 17, 2009, 05:54:20 am

Lord...I wouldn't worry about failure. I still believe the Hyvo set up is a much more stout means of power transfer than the OEM pieces. I would think M3 was using the old CR750 chains at one point so maybe that is more the comparative to the Hyvo. I would keep an eye on the tensioner unit. Anyway... after all your time and investment you're only going to be doing parade laps and such....right

p-a-r-a-d-e....what's one of those then Mike? Actually I think I know - it's a magazine we have in the UK from the top shelf where young ladies are photographed in obviously very very hot conditions because they have to take all of their clothes off!

The plan for my CR is to show her once finished and then race of course - that's what bikes are for aren't they!?

I wonder if M3 also used the beefed up tensioner system that was in the CR750 kit? I'm sure Mark tried all sorts of things. The kit tensioner spring was much higher rated than standard but of course like all of the 970 parts, totally impossible to find.

When fitting my tensioner we worked out that preloading the spring in the tensioner socket with three M8 washers stiffened the tensioner blade massively....so that's what I'm running....and of course the oil feed to pressurise the tensioner too.

If anything, this is the frustrating thing for anyone trying to build a CR750 replica - there's tons of knowledge out there, things have been tried over and over, BUT, there's just no repository for all of this information and those that have done the hard work seem very reluctant to share. I thought bikers were a kind of brotherhood until I came across this 'feature' of building a CR....

Don't get me wrong though - Mark is definitely one of the good guys and it's to our collective benefit that there are people like him willing to invest the time in trying things out, breaking stuff, fixing up a better solution and trying all over again.

I might talk to B&C Express in the UK about this chain. If it's european they will know what it is I'm sure....

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Author Topic: Heavy Duty primary chains from M3... (Read 22752 times)