Can anyone recommend a good quality brand of Bigend shells for an A65 race bike. Quality being the optimum word here. There are a lot on the market with good old big brand names that I can buy for £10 a set trade. But a cannot begin to imagine what materials are in there.
The old Vandervell's for the A65 were white metal instead of their VP2 Trimetallic, not sure what was going on there as Triumph and Norton used the Trimetallic, white metal was the wrong material. As Nick says go for the Clevite Trimetallic, Vandervell's bought the licence for the process from Clevite and only changed the overlay plating from lead/tin to Lead/indium. The indium is a great antisieze protector for the first startup but overkill after that, in a road bike Al/an bearings are a better choice due to lower wear rates and the higher fatigue strength of Trimetallic is not needed. All will be helped by an oil filter.