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Messages - rannsachair

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British Bikes / Re: T120 Tacho drive in crankcase thread problem
« on: February 12, 2009, 07:59:20 PM »
Just visited GrinTriumph and advised to weld up and re-tap for RH thead.  Were very helpful.

Thanks :)

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British Bikes / Re: T120 Tacho drive in crankcase thread problem
« on: January 26, 2009, 09:42:43 PM »
Might work, but I decided to to partially strip anyway to fit new rings, valves etc. Found a tappet fitted the wrong way round that was starting to pick-up!

Engine currently has all clutch removed, barrel etc. so not too much work to split the rest for piece of mind.

So I would prefer to make a permament repair.

Thanks

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British Bikes / T120 Tacho drive in crankcase thread problem
« on: January 26, 2009, 09:14:48 PM »
I have a 1969 T120, there was a slight oil leak from the tacho drive, so decided to investigate.

The left hand thread in the crankcase has been partially stripped (I suspect a previous owner has tried to remove it as a right hand thread). :'(

I believe it was a right hand thread up to 1969.

Any repair suggestions, I wondered if I strip it all down if I could get a helicoil for the crankcase and rethread it for a right hand thread and fit an earlier tacho drive?

Anyone else had the same problem or suggestions on how best to fix?

Thanks

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