Dunno how well this will turn out when I re-sleeve my TS OEM steel bush with SAE660 - as I don't intend to do very many miles., but it says alot about topics raised on here..namely the wearing effect of various bronzes on the timing side crank bush and the merits of different materials.
My 59A77SS bought stored since the late 1960's has never been opened. It has about 38K miles on the Smith's. When opened , it had the original steel lined TS bush with a pegged lead bronze (LB2?) liner/insert.
Took the crank down to be professionally measured up. The obality of the TS journal was half a thou. The ovality of the bush insert was 0.004". So BSA were wise indeed to use such a forgiving materiel as lead bronze.
Of interest I have no intention of grinding to 0010" under. I shall have a new insert in SAE660 pegged and pressed-in, then line-reamed/bored to .00005 to .0001". I would have preferred LB2 or LB3 but they seem impossible to get in small amounts.
