The BSA A7-A10 Forum

Technical => Clutch, Primary, Gearbox => Topic started by: Dave on 23.03. 2021 20:17

Title: Unsure which outer clutch cover is right for my bike build?
Post by: Dave on 23.03. 2021 20:17
Hello,

Please can I ask for advice on the two covers that I have. I really don't know why they are different or which I need to fit. One has a extra hole and seems to have a breather for some reason too.

The Engine is a 1960 A10 the frame 1954

I'm guessing the one with only one hole is the older one, but its a bit of a mystery.

Many Thanks
Dave
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: Roger (Doomtrainbarx) on 23.03. 2021 21:07
The extra hole is for the 4 spring clutch adjustment - it is the later cover.
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: Dave on 23.03. 2021 21:29
Hi Roger, Thankyou for the information.
The bike has a upgraded 4 spring clutch so you'd recommend the later cover? Do you know roughly when the upgrade was introduced at BSA? I need to find a plug for it if so, as I've only got the bigger one. Another missing part to look for!!

Dave
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: Jules on 23.03. 2021 23:51
"seems to have a breather for some reason too." - where is the breather Dave, (just for interest)??
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: BritTwit on 23.03. 2021 23:54
I believe the 4 spring clutch first appeared in the 1960 A10 parts book.
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: BSA500 on 12.05. 2021 13:05
I think its not a breather its the oil drain bolt that is being referred to
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: Joolstacho on 13.05. 2021 01:15
Yes the later one is also more useful because it has the combined oil drain plug and oil level plug, so you don't even need to measure the oil going in when you top it up.
Title: Re: Unsure which outer clutch cover is right for my bike build?
Post by: RichardL on 13.05. 2021 05:07
Yes the later one is also more useful because it has the combined oil drain plug and oil level plug, so you don't even need to measure the oil going in when you top it up.

No need to measure in the oil on the older version. Leave out first 1/4" screw behind the lower 5/16" and wait for overflow. Put it back when done (the screw, not the dripping oil). *smile*

Richard L.