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Author Topic: Another Gearbox Question  (Read 944 times)

Offline Lightningpower

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Another Gearbox Question
« on: 22.07. 2010 04:38 »
On another semi-unit gearbox, I have a B 20 stamped onto the lug.  What could this mean?  Thanks again!
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1953 Star Twin - Racing
1953 Super Flash
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet

Offline Lightningpower

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Re: Another Gearbox Question
« Reply #1 on: 22.07. 2010 05:53 »
Another Question,
Why are these gearbox cases different?
It means somthing....  but what?
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1953 Star Twin - Racing
1953 Super Flash
1956 Road Rocket
1958 Super Rocket
1959 Spitfire Scrambler
1967 Hornet

Online muskrat

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Re: Another Gearbox Question
« Reply #2 on: 22.07. 2010 10:46 »
Very interesting, just a guess, one could be off a longstroke rigid the other off a plunger. The sprockets are different, it looks like a 530 on the left and 520 on the right.
Cheers
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'51 A7 plunger, '57 A7SS racer now a A10CR, '78 XT500, '83 CB1100F, 88 HD FXST, 2000 CBR929RR ex Honda Australia Superbike .
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Muskys Plunger A7
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