The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: Nomad54 on 09.11. 2024 18:49
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Looking to replace the primary chain on my 1963 BSA a10. What is the best chain to use and what size, number of links etc ? Is it better to use imperial size or use metric.? I am ok with the rear chain.
Tom
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Just make sure u don’t get a cheap chain with “split rollers” (designed for low speed applications) as these will disintegrate in the primary. Speaking from experience on a B31 which has a similar primary.
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G'day Nomad.
I used these on my A7SS racer (before I converted to belt). https://www.classicmotorcyclespares.com/default/primary-chain-bsa-a10-swinging-arm-69l-1954-62-genuine-renolds.html Modern equivalent is 428.
Cheers
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I recall those split roller chains. There was a phase of passing those off as OK for bikes ads they were half the price but I recall the rollers would open up. They still turn up so its always worth checking to make sure you don't have on on a purchase.
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I recall those split roller chains. There was a phase of passing those off as OK for bikes ads they were half the price but I recall the rollers would open up. They still turn up so its always worth checking to make sure you don't have on on a purchase.
Madras Enfield used split roller primary chain on new bikes, as recently as 1988.
The chain fell to bits. What a surprise.
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Hi Nomad,
I have "Regina Gold" primary chain fitted
A lot of lesser chains have thicker side plates which can cause clearance issues
There are some reports that Renolds chain is not what it used to be ??
John
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Looking to replace the primary chain on my 1963 BSA a10. What is the best chain to use and what size, number of links etc ? Is it better to use imperial size or use metric.? I am ok with the rear chain.
Tom
Maybe just order from Draganfly, 20 quid ish
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I use Renolds. Works fine.
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put a renolds on mine .......imperial not metric
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Renolds for me too. Only about £20
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Regina on mine, new chain, engine sprocket and clutch chainwheel. Two years ago, not had to adjust it yet. *good3*
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As with most things, you get what you pay for! My preference is for Regina chains.