I knew I spoke too soon on this one-now that I have come to properly fit the G1 case, i have hit a snag- managed to ream out the kickstart shaft bushes OK and now can fit the case tight with a nice free K/S shaft, but no way with the gear lever.Oilite bush needed a lick with the reamer to get the change shaft in, but despite being a really sloppy fit over the G68 pin, it binds when case nipped up.After some investigation, I have realised that the G68 pin is well off centre in relation to the hole bored in G1 casing for the gearchange,- best I can measure its centre is about 12-15 thou southeast of the casing hole.G68 is not bent-annoyingly its so square to the G50 plate that its perfect.
Initially, i suspected the new spares Co. G1 cover to be badly machined, but a quick delve in my parts pile produced the old original G1, and offering that up produced the roughly same result.Hmm..... I suspect the G50 plate may have been drilled slightly off when the G68 pin was fitted in the factory,and thus perhaps selective fits used.Who is to say my G50 or G1 are the "pair" that left the factory together- probably unlikely after 60yrs and I can only think of making a slightly eccentric bush, carefully positioned in the case to sort it.... Anyone else found similar???? Bob.