Author Topic: gearbox Sprocket - How tight  (Read 665 times)

Offline Gripperod

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gearbox Sprocket - How tight
« on: 25.08. 2011 12:19 »

First time delving into the BSA, I am fitting new chains and sprockets. The gearbox sprocket nut was only finger tight when I removed it - clearly not right. But how tight/what torque should it be? And do i need a special tool - I can only just get a c-spanner on it
1959 A7SS
1970 Yamaha AT1B
1976ish Honda CB750 Cafe Racer

Offline MG

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Re: gearbox Sprocket - How tight
« Reply #1 on: 25.08. 2011 14:33 »
A C-spanner and a subsequent blow with a big hammer and a soft drift does the job.
A piece of old secondary chain wrapped around the sprocket and clamped in a vice is great to hold the shaft (with gearbox out of the frame that is).
1955 A7 Shooting Star
1956 A10 Golden Flash
1961 Matchless G12 CSR

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Offline Gripperod

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Re: gearbox Sprocket - How tight
« Reply #2 on: 25.08. 2011 19:19 »

"C-Spannered and big-hammered" - Sorted! Thanks!


bp
1959 A7SS
1970 Yamaha AT1B
1976ish Honda CB750 Cafe Racer