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Engine Parts question #704450
08/09/17 6:24 pm
08/09/17 6:24 pm
Joined: Jul 2017
Posts: 11
CA
R
RandyTaylor Offline OP
BritBike Forum member
RandyTaylor  Offline OP
BritBike Forum member
R
Joined: Jul 2017
Posts: 11
CA
Can somebody take a look at these engine pieces and make sure they are all the correct ones for each other?

Engine: A65 '62 Star
[Linked Image] [Linked Image]

Inner cover:
Choice A:
[Linked Image] [Linked Image]
Choice B:
[Linked Image] [Linked Image]

Outer Cover:
[Linked Image]

Primary Cover:
Choice A: 68-240
[Linked Image] [Linked Image]
Choice B: 68-720
[Linked Image] [Linked Image]

i am having a hard time finding where the clutch cable enters the case. The bike that i am comparing the parts to ('67 a65 lightning) has the cutch cable going into the outer cover, but mine doesn't have the hole. There is also different places for the tach cable on the inner covers? one has the hole on the end, and the other has it on the bottom. I'm not sure which one to use.

Also, is there a difference to the primary covers? What is the extra hole for?

Thanks!


building a 1962 BSA with my 16 year old son
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Re: Engine Parts question [Re: RandyTaylor] #704463
08/09/17 8:32 pm
08/09/17 8:32 pm
Joined: Jan 2004
Posts: 3,727
ca, us
D
DMadigan Offline
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DMadigan  Offline
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D
Joined: Jan 2004
Posts: 3,727
ca, us
Flip the clutch lifter arm over and you will see the hole for the cable.
On case covers, match the screw holes and dowel locations between the two.
The tach drive is off the end of the oil pump. There will be a boss on the inner cover if it was available that year. The drive off the bottom is for the earlier speedo drive off the layshaft. Later bikes had the speedo gearbox on the rear wheel.
I believe the extra hole was for adjusting the clutch springs but not sure if it was only for the four spring clutch (later engines have three springs).

Re: Engine Parts question [Re: RandyTaylor] #704474
08/09/17 11:13 pm
08/09/17 11:13 pm
Joined: Feb 2003
Posts: 2,930
Ohio
R
Rickman Offline
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Rickman  Offline
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R
Joined: Feb 2003
Posts: 2,930
Ohio
Randy,
I believe the inner cover choice B.

Primary cover choice A.

But, IF you choose B, let me buy A???

If you look at the second pic of choice B inner cover, to the left [ above ] the kicker shaft hole, outside of the gasket surface, one of those two holes is the clutch cable entrance.

Last edited by Rickman; 08/09/17 11:14 pm.
Re: Engine Parts question [Re: DMadigan] #704528
08/10/17 3:21 pm
08/10/17 3:21 pm
Joined: Jul 2017
Posts: 11
CA
R
RandyTaylor Offline OP
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RandyTaylor  Offline OP
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R
Joined: Jul 2017
Posts: 11
CA
Thank you so much for the info. My son and I will look at them in the morning to see what you are talking about. @Rickman, I think we have a couple of choice A Primary covers, I'll send photos of the ones we do not use. OK, I think I see the hole in the inner cover for the clutch cable. It was making me crazy.

We have 4 engines that we can choose from. i started a thread in the British Motorcycles General forum, I am trying to figure out how to get it moved here.


building a 1962 BSA with my 16 year old son
Re: Engine Parts question [Re: RandyTaylor] #704546
08/10/17 7:09 pm
08/10/17 7:09 pm
Joined: Aug 2001
Posts: 802
San Luis Obispo, CA
Richard Phillips Offline
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Richard Phillips  Offline
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Joined: Aug 2001
Posts: 802
San Luis Obispo, CA
Randy,
Very nice project for you and your son. The engine itself seems to be very unique. The low number. The HC might mean High Compression.
Primary cover correct choice would be A. Funny enough I need primary cover B for my 66 Thunderbolt, if you would part with it. Yes inner cover is B, should have the speedo drive. The speedo drive ration is noted on a riveted disc on the inner cover.
To me this is a very interesting BSA 650 Star with a nacelle mounted head lamp and speedo. The speedo itself is unique chronometric. An accurate restoration would be very nice to see.

I live in San Luis Obispo, if you need any advice or help let me know.

Richard

Re: Engine Parts question [Re: Richard Phillips] #704550
08/10/17 7:52 pm
08/10/17 7:52 pm
Joined: Mar 2006
Posts: 3,732
gastonia nc
R
raf940 Offline
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raf940  Offline
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Joined: Mar 2006
Posts: 3,732
gastonia nc
I have nice outer cover B polished from 66 engine send PM if you want to see pics $30 plus shipping


1972 Triumph T120
1968 BSA A65
1968 MGB Roadster
1979 Chevrolet Camaro Berlinetta
1969 Honda Mini Trail
1939 farmall f30 tractor
2004 Honda Shadow Aero
1972 BSA Thunderbolt
1975 yamaha xs650b
1972 Norton commando project
Re: Engine Parts question [Re: RandyTaylor] #704611
08/11/17 11:46 am
08/11/17 11:46 am
Joined: May 2013
Posts: 4,847
Rotherham - S. Yorkshire
Allan Gill Offline

BritBike Forum member
Allan Gill  Offline

BritBike Forum member
Joined: May 2013
Posts: 4,847
Rotherham - S. Yorkshire
The inner timing cover should have a 3 digit number on the area that covers the crank. This should match the numbers on the bottom of the crank cases (done for pairing purposes)


beerchug
Re: Engine Parts question [Re: Allan Gill] #704950
08/14/17 9:25 am
08/14/17 9:25 am
Joined: Aug 2001
Posts: 128
Anchorage Alaska USA
M
Mitch Offline
BritBike Forum member
Mitch  Offline
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Joined: Aug 2001
Posts: 128
Anchorage Alaska USA
I had a '62 some years ago and ya, the HC was supposed to mean high compression


Moderated by  Allan Gill, Jon W. Whitley 


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