1978 CCM Replica Build

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midgie
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Re: 1978 CCM Replica Build

Postby midgie » Wed Nov 29, 2017 1:21 pm

Looks like the b/e pin is made of goats cheese!

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Re: 1978 CCM Replica Build

Postby Andy Chaos » Wed Nov 29, 2017 6:22 pm

At last someone has found a use for goats cheese as it certainly ruins a pizza :shock:

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Re: 1978 CCM Replica Build

Postby stew79 » Thu Nov 30, 2017 1:24 pm

hi joe ? i would put money on the big end pin being too soft and causing the problem. can you take it to a local engineering company to get a hardness test taken from opposite to the most worn part ? if its below 62 rock thats the problem. with some evidence of defective manufacture / hear treat meant / etc you should be able to get your money back, and some thing towards all the extra work ahead. (i would take the oil pump apart to see if its scored up in any way, and look at rocker arm bushes, cam bushes, clutch and primary chain for any little bits of bearing)
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Re: 1978 CCM Replica Build

Postby Malcolms Lad » Fri Dec 01, 2017 8:55 am

Hi,

It is seeming that way to me, I'm off with the whole engine on Monday to a recommended firm so will report back on the findings. In the initial clean up everything else seems to have survived un-marked. Quite a miracle to be honest that said I didn't run too much following the audible 'Knock'. ...... also thanks to the blessing of the mag drain plug!

Cheers,

Joe
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Re: 1978 CCM Replica Build

Postby JB » Fri Dec 01, 2017 10:52 am

We do our own heat treatment and we also send it out depending on the process, if it's case hardened (which it should be) then it should be tested on the Vickers hardness scale, you will get a false reading with Rockwell because it's a much higher load (150Kg Vs 1Kg) and because of this it is meant for testing through hardened parts and not case hardened steel.

Going from your pictures Joe, I still think your piston was running too hot and over expanding and would also have exasperated the big end failure due its own issues...just my thoughts!

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Re: 1978 CCM Replica Build

Postby stew79 » Fri Dec 01, 2017 3:38 pm

good reply jb, 62 was only meant as a ball park figure. if its only 40 ish some thing is very wrong, then to get in touch with alpha to see what figure, and scale etc it should be. i have bought parts in the past that have some how missed out on any heat treatment at all !
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Re: 1978 CCM Replica Build

Postby JB » Fri Dec 01, 2017 4:43 pm

You make a very good point there Stew about it being only 40 ish that somethings seriously wrong, a Rockwell C test will give you a clue on the hardness condition and if it's really bad so will a file :shock:

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Re: 1978 CCM Replica Build

Postby midgie » Fri Dec 01, 2017 7:25 pm

JB wrote:You make a very good point there Stew about it being only 40 ish that somethings seriously wrong, a Rockwell C test will give you a clue on the hardness condition and if it's really bad so will a file :shock:

Spot on jb.

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Re: 1978 CCM Replica Build

Postby stew79 » Sat Dec 02, 2017 11:07 am

the file test is as old as time, but a hardness number in a brief report on headed note paper, from an engineering company, is better "evidence" for a compensation claim
stew

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Re: 1978 CCM Replica Build

Postby minetymenace » Sat Dec 02, 2017 7:31 pm

stew79 wrote:a compensation claim

:shock:
While it may be an expensive exercise to rectify the problems, litigation will use up what little time you have on this planet. Yes, establish the cause in you own mind and present it to the supplier, if you get no joy, name and shame (putting the onus on the supplier to prove your slander). Life is too short to spend time in court, rebuild and ride, and recount your tale of woe over a glass of beer for many years to come.
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Re: 1978 CCM Replica Build

Postby chucksy » Sat Dec 02, 2017 8:14 pm

And that's the best advice ,just fettle her up and get on.A small breakdown on old gear is just a blip ,aggravation,nothing more. You,ll sort it and forget about it.

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Re: 1978 CCM Replica Build

Postby stew79 » Sat Dec 02, 2017 8:44 pm

ok, my choice of words "compensation" is too drastic, but with rts claiming that its your fault (lack of oil ?) and alpha having some sort of bad track record with there big ends, numbers on a piece of paper might help get some of your money back.
stew

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Re: 1978 CCM Replica Build

Postby minetymenace » Sat Dec 02, 2017 9:34 pm

:ok
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Re: 1978 CCM Replica Build

Postby Malcolms Lad » Sun Dec 03, 2017 12:24 am

Hi guys

Thabksnfor your supportive words, I'm setting about cleaning bagging and boxing it all tomorrow for a trip North on Monday.

Hopefully we'll get a plan together and she will live for next season. Tbf as costly as it maybe it'd be boring if it had just worked lol. And also it's an excuse to spend more time chatting and speculating with my old man in the shed which to me, is priceless!

I'm just so very appreciative of this small community that really inspired me to build both the bikes offer these years. It also spurs me to carry on get more miles out of it.

There really is nothing like the feeling if an oif unit single and the 441 is a stunning motor to behold when it's on form!
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Re: 1978 CCM Replica Build

Postby Malcolms Lad » Tue Dec 05, 2017 12:06 pm

Hello all,

Just a quick update, the crank is now in for the second rebuild wooooo!

So on further investigation we found the big end cage to actually be to wide, significantly enough that it appears the bearing was never truly rotating so with the rollers skidding on the journal and outer ring resulting in my record time failure for a B44 road engine big end.

Following the inspection I have to say i'm just satisfied that I have an answer to the issue and it appears it isn't a result of my assembly which is always a comfort. For a few moments i did begin to second guess and question myself.

Anyways its looking likely she will be ready to go back together early in the new year! Can't wait to get some miles!
How to rupture yourself in one easy lesson!

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Re: 1978 CCM Replica Build

Postby koncretekid » Tue Dec 05, 2017 12:48 pm

Malcolms Lad wrote:Hi guys

Tbf as costly as it maybe it'd be boring if it had just worked lol. And also it's an excuse to spend more time chatting and speculating with my old man in the shed which to me, is priceless!


So very, very true. My Dad died when I was 18 and I never got the chance. Just recently, my oldest son started a new business and I'm getting the chance to communicate with him all over again, a chance that I never had. Priceless!

Tom
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Re: 1978 CCM Replica Build

Postby Andy Chaos » Tue Dec 05, 2017 12:55 pm

i know its getting off topic but i have to agree.
My Dad had an heart attack earlier this year and he has now just lost his twin brother, suddenly time seems short and precious.
We have even been looking at the cost of insurance to get him over to Bonneville while he still can.
Last edited by Andy Chaos on Tue Dec 05, 2017 4:37 pm, edited 1 time in total.

Malcolms Lad
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Re: 1978 CCM Replica Build

Postby Malcolms Lad » Tue Dec 05, 2017 2:05 pm

Do it guys.....

I went with me dad yesterday and spent the whole day talking about this and the original bike etc. Stuff the metal work and machinery just won't tell ya.

I feel very lucky to be able to spend that time and hear such wonderful things and if its only the cost of repairing a broken engine that prompts this then i'd do it over again several times over!
How to rupture yourself in one easy lesson!

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Re: 1978 CCM Replica Build

Postby Malcolms Lad » Wed Jul 11, 2018 12:31 pm

Hi guys back again... Will post some photos later... it's finally back together and now having done 308miles seems stronger than ever. This past weekend I took it all over the peak district on a rally with me dad on his van van. Quite alot of fun was had and she never missed a beat. Loving it right now.... bloody loud though!
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Re: 1978 CCM Replica Build

Postby Jango » Fri Jul 13, 2018 7:40 pm

Malcolms Lad wrote:Hello all,

Just a quick update, the crank is now in for the second rebuild wooooo!

So on further investigation we found the big end cage to actually be to wide, significantly enough that it appears the bearing was never truly rotating so with the rollers skidding on the journal and outer ring resulting in my record time failure for a B44 road engine big end.

Following the inspection I have to say i'm just satisfied that I have an answer to the issue and it appears it isn't a result of my assembly which is always a comfort. For a few moments i did begin to second guess and question myself.

Anyways its looking likely she will be ready to go back together early in the new year! Can't wait to get some miles!


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