Author Topic: triumph belt drive help may be of use to BSA's  (Read 517 times)

Offline chaz

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Hi all, just finished the rebuild of a Triumph T120 1066. standard primary has been changed for a Bob Newby belt drive. my problem is that there is a seal in the crankcase that keeps the gearbox oil in and seals around the drive sprocket. there is a seal in the back of the primary inspection plate behind the clutch which in theory is no longer needed as it keeps the oil in the primary, now not needed.

problem is between mainshaft and mainshaft hi gear there is clearance and oil would flow into chaincase, as we do not want this does anyone know if a oil fling/return groove can be machined in high gear? if so anti clockwise and depth and length that would help?

dont know if BSA's can use the  same type of belt drive primary, or does anyone know a better way? thanks
allways willing to learn
United Kingdom

Online muskrat

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Re: triumph belt drive help may be of use to BSA's
« Reply #1 on: 12.08. 2012 00:12 »
 G'day chaz,
                 I got a new nut with a built in seal for that problem. Got it from John at Lytedrive in Melbourne Aust
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'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
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