600 Twin Problems

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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Re: 600 Twin Problems

Postby MartinAmes » Sat Oct 12, 2013 4:42 pm


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Re: 600 Twin Problems

Postby 1608 » Sat Oct 12, 2013 5:26 pm

Kevin, if you are suggesting that the -10 thou shells are machined larger ( opened up ) then I don't believe this is possible. You will simply be removing the white metal or bearing material from the shell. Somebody with far better engineering experience than me will no doubt have better some advice, but I shouldn't think it too difficult to source some new shells from somewhere other than the club spares. I haven't found the club spares very helpful of late I'm afraid.

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Re: 600 Twin Problems

Postby G15 Roy » Sat Oct 12, 2013 5:34 pm



All of the above buy from the club so will not be able to help?
Roy

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Re: 600 Twin Problems

Postby kbs1240462 » Mon Oct 14, 2013 7:24 pm

Hey ho!!

Called the normal suspects today and it looks like 10 thou' shells are currently not available!! Talked to a helpful guy at Andrews who suggested I get 20 thou' shells opened out to 10 thou' - anyone have any experience of going down this route?

Thanks,

Kevin

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Re: 600 Twin Problems

Postby g80csp11 » Mon Oct 14, 2013 7:44 pm

Everyone runs out of twin bearing shells so often , all at the same time - it happens every year or so it seams
Clearly they are all sourced by a single order from one of the suppliers
Isn't it about time that the order size was increased .
Perhaps the club should place a bigger order , I suspect that they only hold a minimum stock

Stock control really should not be a problem , about time someone sorted this out !

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Re: 600 Twin Problems

Postby ajscomboman » Mon Oct 14, 2013 8:39 pm

"Stock control really should not be a problem , about time someone sorted this out !"

Oh lord, another expert! :headbang:

You're welcome to give it a try Peter, you won't find it as easy as you're implying.

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Re: 600 Twin Problems

Postby g80csp11 » Mon Oct 14, 2013 10:18 pm

Rob ,
i'm not saying it's easy , but that's why i'm not running the spares scheme .
Perhaps i'm underestimating the problem but if it takes 10 weeks to get new stock then we should be ordering when the stock level get to 12 weeks x average weekly sales in the previous year point .

Of course this only works if the Club actually places the orders , and does not just but from a third party where stock levels are unknown

I'm only an engineer and not a store man but do order prototype parts on a regular basis from suppliers and understand that there is a lead time to manufacture spares

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Re: 600 Twin Problems

Postby Stuoyb » Mon Oct 14, 2013 11:53 pm

Stock levels are reviewed weekly in line with good inventory management practices and we try to keep 3 - 6 months stock according to movement pattern and supplier leadtime.
Sometimes suppliers change leadtime without prior warning or want a larger volume to make manufacture more cost effective (read profitable for them) and effectively "hold us to ransom". We even have scenarios where suppliers accept an order and then inform us that they can't get the raw material or allocate production time until months ahead. For example, at the present time there is a shortage of the stock material used to make fork legs (due to production issues at the rolling mill) and accordingly the market demand has driven the price up by 1000%. The manufacturer is therefore reluctant to buy the material in as the price will inevitably fall as more becomes freely available and I don't imagine that anyone would want to buy the fork legs at what would be a very inflated price.
Getting parts for machines 50 years old (or more) is not easy as there are not that many suppliers out there willing to manufacture in smaller batches and at economic prices.
Some of the tooling used to make the parts is now also obsolete and suffers frequent breakdowns requiring regular maintenance.
I wish it were just as easy as ordering within leadtime and getting the supplies on time. But the fact is that it isn't and hence parts are sometimes out of stock or worse still - just not available any more.
If anyone has a good crystal ball that they could loan us ...................!
Last edited by Stuoyb on Tue Oct 15, 2013 7:15 am, edited 3 times in total.

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Re: 600 Twin Problems

Postby Groily » Tue Oct 15, 2013 6:03 am

The last pair of -10 mains I got came from British Only in Austria - but I think their stock is also exhausted now. Worth a try though maybe, just in case.
Points very well made re problems with sourcing parts, being held to ransom etc - it's a universal problem for clubs.
However, hint hint - hopefully it isn't stopping us getting the stock of std big end shells suitably chamfered to supply with the new 650 cranks as they arrive? Because whatever anyone might think, stake their life on etc etc, stock shells will not go on perfect new radii because their chamfer is not per the original part! This I know, from having installed the first prototype crank in my Mod 31, and T&L Engineering would confirm, having dynamically balanced it and seen all the bits. Cheers, Bill

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Re: 600 Twin Problems

Postby ajscomboman » Tue Oct 15, 2013 6:30 am

Shells are all sorted for the new cranks.

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