The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: Slymo on 27.11. 2018 07:51
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Got the seat back from the upholsterers and took the Super Rocket for an illegal tour of the neighbourhood. It goes very nicely and I am getting used to the considerable extra weight from my bitsa RE Bullet and the B44SS that I recently sold. What was noteable was the very tall gearing. It’s not out of order but there will certainly be some clutch work to do.
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What tranny are you running?
RRT2 will do that in 1st & 2nd, 3rd is same all round, so the gap between 2 & 3 is closer and good for mountain windies
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I’ll have to check it out. I assumed it was a standard box for the SR whatever that is. Where do the identification numbers find themselves?
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A standard box will have 'STD' stamped on the inner cover just to the right of the clutch actuating lever, clearly visible. If it's got anything different there is a BSA gearbox ratios data sheet which tells you what internal gearing the various boxes have. Quite a few people prefer tall gearing and achieve this by fitting large engine and / or gearbox sprockets. It might be worth checking these too.
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I’ve put the sprockets as per the parts book for the 1958 Super Rocket which are a lot taller than the ones it came with. The primary sprocket is 21 teeth and the gearbox 19 which were 18 and 17 when I got it which I presume was a set up for a chair, either that or towing a caravan.
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It appears to be a standard box although Barry was obviously a little hung over when he put the letter punches to it
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They're nearly all like that sir.....