Gearbox output shaft bearing

Information relating to the Matchless G2 or AJS Model 14 250cc Lightweight
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Re: Gearbox output shaft bearing

Postby Steve S » Thu Apr 20, 2017 8:58 am

My thought is that dealers have mistakenly sold the pegged third gear as the replacement to match the sleeve gear with dogs. Les at Russell motors swears blind that the one with pegs he sold me a few months agog is part number 044076, but we now have confirmation that this one should definitely have dogs.

The mismatch led to a fair amount of damage to my sleeve gear dogs and jumping out of top gear even on a light load.

Steve S.

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Re: Gearbox output shaft bearing

Postby Ozmadman » Thu Apr 20, 2017 3:50 pm

Just to open a similar can of worms... the second gear on the layshaft is the same gear as the aforementioned 3rd/sliding gear. This was never modded and remains the peg type BUT this still matches up with a dogged 1st gear as far as I remember??? or is that 1st/kick start gear recessed to take the pegs? can't remember now
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed

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Re: Gearbox output shaft bearing

Postby clanger9 » Thu Apr 20, 2017 4:22 pm

Definite can of worms. Pegs, dogs, take your pick! ;)

Here are photos of two 1st/2nd gear sets I have to hand. I can't say for definite if these are "early" or "late" - the serial numbers of the gearboxes these were taken from are G3053 for the left pair and G4854 for the right (but as we know these gearboxes could have been fitted with anything over the years)
IMG_1038.jpg


IMG_1039.jpg

The gearbox fitted to my CSR is much later than either of these (GR21322), so no doubt when I take it to bits I'll find something different again...
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1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

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Re: Gearbox output shaft bearing

Postby Ozmadman » Thu Apr 20, 2017 10:50 pm

clanger9 wrote:Definite can of worms. Pegs, dogs, take your pick! ;)

Here are photos of two 1st/2nd gear sets I have to hand. I can't say for definite if these are "early" or "late" - the serial numbers of the gearboxes these were taken from are G3053 for the left pair and G4854 for the right (but as we know these gearboxes could have been fitted with anything over the years)
The gearbox fitted to my CSR is much later than either of these (GR21322), so no doubt when I take it to bits I'll find something different again...
Thanks, that has answered my question (the 1st gear has recesses to take the pins/dogs) and I reckon from that picture both would work fine. Those box numbers of yours should both be the late type as far as I can tell
Paul
1960 Model 8
1974 Yamaha RD250B US Model 6 speed

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Re: Gearbox output shaft bearing

Postby Steve S » Fri Apr 21, 2017 9:43 am

Ozmadman wrote:Just to open a similar can of worms... the second gear on the layshaft is the same gear as the aforementioned 3rd/sliding gear. This was never modded and remains the peg type BUT this still matches up with a dogged 1st gear as far as I remember??? or is that 1st/kick start gear recessed to take the pegs? can't remember now


Yes the kick start gear has recesses for the pegs, just checked my box in bits, Steve S.

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