The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: jhg1958 on 08.05. 2021 17:54

Title: wired bolts on primary chain case
Post by: jhg1958 on 08.05. 2021 17:54

I have just noticed in the Haynes manual the 2 rear bolts that hold the inner part of the primary chain case to the engine should be wired. I have used allen bolts with locktight on the threads.

Am I being foolish?  I realise that should these bolts work loose they will cause a bonny mess of the primary drive and the clutch, but wired?

John

1961 BSA Golden Flash swinging arm.

Title: Re: wired bolts on primary chain case
Post by: RichardL on 08.05. 2021 19:12

I guess it depends on your comfort level with the allen bolts. If you want to keep the allen bolts and still want wire, drill through the heads.

Richard L.

Title: Re: wired bolts on primary chain case
Post by: BSA_54A10 on 09.05. 2021 08:49

Just so long as you put a thick washer under the head equivalent in area to the original it should be fine
Allan head have a bad habbit of eating into alloy as they were specifically designed for clamping steel