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Odd gear identification
#816184 07/14/20 1:59 pm
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Came across a couple of BSA gearbox gears that are not in the list of 17 s/a gearbox gears. They are second gears:

'C' 67-3222 (21t)
'D' 67-3224 (22t)

Can anyone confirm if these are s/a gears? Maybe an optional gear set for a S/A gearbox?

Thanks,

Dave

Last edited by Dave - North of 60; 07/18/20 2:57 am. Reason: Update

1958 BSA DBD Gold Star Clubman
1957 BSA Gold Star - work in progress
1965 Ducati 250 Scrambler
1971 Ducati 250 Mk3
1977 Hercules GS175
1981 Ducati Mike Hailwood Replica
(long pause)
2005 KTM 450 SMR - street legal (for going to the corner store)
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Re: Odd gear identification
Dave - North of 60 #816198 07/14/20 6:33 pm
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Dave: I cannot find any ref to those gears but I see that Mike's Classics in Aus has them for sale and his calls them B31 type gears.

The earlier big single M type gearboxes had quite different gears but there were the later gearboxes for the P/U 250 range (C10/11 etc). Maybe?

Gordo


The roadside repairs make for the best post ride stories.
Re: Odd gear identification
Dave - North of 60 #816601 07/18/20 2:58 am
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Got a better pic and I now don't think they are S/A gears at all, but definitely BSA. Part numbers are stamped on them.

https://freeimage.host/i/dqliG4


Any ideas?

Last edited by Dave - North of 60; 07/18/20 3:01 am. Reason: Added pic...I think!

1958 BSA DBD Gold Star Clubman
1957 BSA Gold Star - work in progress
1965 Ducati 250 Scrambler
1971 Ducati 250 Mk3
1977 Hercules GS175
1981 Ducati Mike Hailwood Replica
(long pause)
2005 KTM 450 SMR - street legal (for going to the corner store)
Re: Odd gear identification
Dave - North of 60 #816721 07/19/20 1:56 am
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Dave: What about the early plunger A7 semi-unit engine with gearbox bolted directly to the back of the engine? Someone on the forum must have a parts book for those gears.

Gordo


The roadside repairs make for the best post ride stories.
Re: Odd gear identification
Dave - North of 60 #816740 07/19/20 9:26 am
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Re: Odd gear identification
Dave - North of 60 #816957 07/21/20 6:33 pm
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Dave; I did not go through all the charts that kommando posted for you but I did look at a few gearsets. All the STD and SC sets I looked at had no numbers stamped into any of the gears. The only gears I could find with stamped numbers were two SCT H gears that were stamped 42-3210. These gears look like the STD/SC H gears but would have a slightly different size bushing to fit the roller bearing layshaft. The stamped in number would prevent these gears being used by mistake in the non roller bearing boxes I suppose. Interesting though is that the oblong holes in the gear used to engage the F gear are a little shorter than the holes found on the H gear used for a bushing layshaft.

Given that your gears have numbers for to identify them I would expect that they were not normal gears for any bike. Could you post a photo of the other side of the gears?

When I look at your photo the gear on the left with the inner splines must be the C gear but looking at the mating surface it could not engage either a STD A gear or SC A gear so must be for some other box. Maybe you can find an A gear that matches that gear for indent purposes.

Gordo

Last edited by Gordo in Comox; 07/22/20 3:16 pm. Reason: added info

The roadside repairs make for the best post ride stories.
Re: Odd gear identification
Dave - North of 60 #817167 07/23/20 3:09 pm
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I stuck both part numbers into Dragonfly's site and neither shows up, possibly pre war.

Re: Odd gear identification
kommando #817314 07/24/20 5:24 pm
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Thanks for the efforts I have also looked through a lot of parts books and not found a match yet. I would suspect they are pre S/A gears. Interesting but not a solution to the 67-3226 gear that I am (still) looking for to complete a DAY gearset.
It does seem that the majority of the S/A gears have no stamps...makes ID all the more interesting...
For my DAY cluster I have one gear that is stamped 67-3076 which is from an early Star Twin wide ratio box....same gear as DAY 67-3207. Now if only I can find an earlier gear to deal with my missing 67-3226.....


1958 BSA DBD Gold Star Clubman
1957 BSA Gold Star - work in progress
1965 Ducati 250 Scrambler
1971 Ducati 250 Mk3
1977 Hercules GS175
1981 Ducati Mike Hailwood Replica
(long pause)
2005 KTM 450 SMR - street legal (for going to the corner store)
Re: Odd gear identification
Dave - North of 60 #817347 07/24/20 10:26 pm
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Hi All,
The gears in question are not like the earlier rigid/ plunger BSA , or the C range heavyweight box
The gears 3222, 3224 have the strong engagement dogs like those in the competition gearboxes
The A10 and GS gears are usually stamped EN36 (steel type)
lesser / older models can have V18 stamped on the gears (Vibrac ??)

John


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