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Motorcycle Discussions => British Bikes => Topic started by: tractorman on September 20, 2010, 09:12:00 AM

Title: Triumph white metal bearings
Post by: tractorman on September 20, 2010, 09:12:00 AM

Hi, can anybody tell me when Triumph changed from white metal to shell big end bearings on the 500cc engines. is there any external marking on the engine to show the change, is there an engine number noted when the change took place ?

Title: Re: Triumph white metal bearings
Post by: Rex on September 20, 2010, 09:18:17 AM

1956 (Aug 55)  and engine number 70930, but I bet there's engines after that still with white metal bearings.

Title: Re: Triumph white metal bearings
Post by: tractorman on September 21, 2010, 08:26:46 PM

thanks Rex. Good guide reference, but I'll be beware

Bernard

Title: Re: Triumph white metal bearings
Post by: rogerwilko on September 22, 2010, 12:48:57 AM

I'm sure most of these have been converted to shells by now?