Author Topic: what do I need primary side  (Read 502 times)

Offline Devlin

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what do I need primary side
« on: 09.07. 2022 21:53 »
This all thats on the primary side other than the obvious what do I need in the way of bits I may miss spacers and washers etc
DM
Isle of Arran 49 A7 LS

Offline a10 gf

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Re: what do I need primary side
« Reply #1 on: 09.07. 2022 22:48 »
Get hold of the parts book \ service sheets etc. & dig around in the Service Literature board, lots of info there.

Attached, a pdf showing all parts, probably relevant for your model.


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Offline Devlin

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Re: what do I need primary side
« Reply #2 on: 09.07. 2022 23:02 »
Cheers Just the job
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Re: what do I need primary side
« Reply #3 on: 10.07. 2022 00:55 »
I can probably supply everything you need either new or second hand.

Offline Swarfcut

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Re: what do I need primary side
« Reply #4 on: 10.07. 2022 09:02 »
  Devlin The early engines are prone to damage to the threads that retain the Primary Cover bolts. The threads are 1/4 Whitworth, so a correct tap, cleaned up threads and cleared holes (no muck in the bottoms) go a good way to keeping the oil in. New bolts are readily available, but have different lengths and need some sorting out. Don't try an M6 Tap, that won't do. But a 1/4" UNC tap is used by some to clear worn threads.

 Parts catalogues are available in the Forum Literature Section, along with Service Sheets, Sheet 208 covers clutch assembly. First plate into the basket is a plain one, 67-3240. This is considerably thicker than the rest of the plain plates as it supports the whole spring tension in the assembly.

 Looking closely at the chain tensioner I reckon it's got the spring steel plate underneath. This is incorrect, tensioner goes in first, then spring plate on top. All tensioners have characteristic wear grooves....that looks a good one. You may find a date stamp under the tensioner. At this stage I would be more concerned with the timing side, Oil pumps are prone to seizure on standing, and can be damaged by jumping on the kicker. No chance of that now, but worth completing an overall assessment of condition before spending piecemeal on bits. Arrange finance now....

 Swarfy.

Offline Greybeard

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Re: what do I need primary side
« Reply #5 on: 10.07. 2022 11:31 »
... Arrange finance now....
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Offline Devlin

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Re: what do I need primary side
« Reply #6 on: 10.07. 2022 12:56 »
Swarfy cheers for that I will be having the engine on the bench as soon as I make room and the BMW goes home, I have no experience of these bikes so I will be doing my homework and on here.... A lot 
Isle of Arran 49 A7 LS