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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gearboxes.
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<blockquote data-quote="Robert Watson" data-source="post: 1765" data-attributes="member: 38"><p>Hey John and John. Thanks for the replies. </p><p></p><p>The layshft selector of course is the one that doesn't wear out, that is why they have them! The main shaft one is the one that wears out and is not available new anywhere - Draganfly, VOCS and others I have tried. The three pieces in the gearbox that seem to take the most abuse are 14 BA, 15 BA, and the selector. None are available new at the moment but the good news is that 14 and 15 are, as they say. in progress. I have it looks like, a used selector fork in transit thanks to a very kind Club Member - what a Club, and I have also located a full dogged gear set. It's not a close ratio but it is in reasonable shape. This will go in the TTR and the gears that came with the box with the TTR will go in the twin. Now I have some serious case repairs to make, although I'm on the trail of a main box, I do have one kickstart cover (3BA M12 if anyone has one- and it is different from the post war Comet) that is a real mess, having blown out the snap ring groove that holds the main bearing plus some other cracks! In the meanwhile I have started rebushing the good bits I have. TT Industries in NZ list a full box for NZ$5700 but I suspect that nothing would be interchangeable - except the complete box. </p><p></p><p>This is just the gearbox, I can't wait 'till I tackle the engines!</p><p></p><p>Robert</p></blockquote><p></p>
[QUOTE="Robert Watson, post: 1765, member: 38"] Hey John and John. Thanks for the replies. The layshft selector of course is the one that doesn't wear out, that is why they have them! The main shaft one is the one that wears out and is not available new anywhere - Draganfly, VOCS and others I have tried. The three pieces in the gearbox that seem to take the most abuse are 14 BA, 15 BA, and the selector. None are available new at the moment but the good news is that 14 and 15 are, as they say. in progress. I have it looks like, a used selector fork in transit thanks to a very kind Club Member - what a Club, and I have also located a full dogged gear set. It's not a close ratio but it is in reasonable shape. This will go in the TTR and the gears that came with the box with the TTR will go in the twin. Now I have some serious case repairs to make, although I'm on the trail of a main box, I do have one kickstart cover (3BA M12 if anyone has one- and it is different from the post war Comet) that is a real mess, having blown out the snap ring groove that holds the main bearing plus some other cracks! In the meanwhile I have started rebushing the good bits I have. TT Industries in NZ list a full box for NZ$5700 but I suspect that nothing would be interchangeable - except the complete box. This is just the gearbox, I can't wait 'till I tackle the engines! Robert [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Gearboxes.
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