Hi Ron

Thanks.

The B33 frame has a bolt going through the plates where the forked part of the M20 adjuster goes so I will probably get away with just extending the adjuster to replace that bolt. Although I think some of these adjusters are already in that form (65-4596), if I can get hold of one.

M20


B33

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The early B33 inherited that gearbox adjustment from the B30 and a few pre war 'B' models..Ian

email (option): ian@wright52.plus.com

Hi Pete, We have an 1947 B33 which also had a later box fitted with the same one side cut out as your picture. Have not checked if that cutout was correct regarding the chainline but replaced it with a correct early box.

They are nice little lightweight bikes but I agree that the early box is probably to light for the 500.

For me, cutting down the feet of the case would be out of the question.....you also have to remove the ribs which supports the feet. If I really wanted it I would first concentrate on modifying the plates in a way so they can take the later box.

Good luck, Michiel

I've got plenty of spare gearbox main cases if you want to experiment...Ian

email (option): ian@wright52.plus.com

thanks Ian, I think I have a spare case in the parts bin but I'll keep the offer in mind if I can't find it. I hope to get to Torrington as soon as this virus allows!

I am a bit concerned about the strength of the case if the webs are cut off but thought I'd go that route before making new plates. What's the worst that can happen? :thinking_face: :fearful: :scream:

Hi
i have this housing gearbox NOS
if u interested i can send photo to u very soon
cheers

email (option): sl_hussein@yahoo.com

Hi Hussein,
thanks, but I'm sure I have a spare servicable case that I can use.:+1:

Hi Pete
i hope good luck to u
cheers
Hussein

email (option): sl_hussein@yahoo.com

Morning Ian, email sent regarding your gearbox casings.

Many thanks.
Martyn

email (option): Gwyndwr@icloud.com