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It is never a good option to use non-standard or modified parts. If you machine the crown of a piston, every time you fit a replacement you have to replicate the modification. The Japanese never work on that basis. All you do is buy their bits and fit them. I think if I was using a Nourish shaft, I'd buy rods which were in common usage, even if I had to lengthen or shorten the barrel and I would modify the journals to accept commonly available shells. Especially if you are racing - if you have to modify every time you fit a replacement part, it becomes a real pain.There is one bike which is particularly bad with this sort of thing. With Vincents, everything is a special. It puts you completely at the mercy of the manufacturers' agents.
It is never a good option to use non-standard or modified parts. If you machine the crown of a piston, every time you fit a replacement you have to replicate the modification. The Japanese never work on that basis. All you do is buy their bits and fit them. I think if I was using a Nourish shaft, I'd buy rods which were in common usage, even if I had to lengthen or shorten the barrel and I would modify the journals to accept commonly available shells.
Especially if you are racing - if you have to modify every time you fit a replacement part, it becomes a real pain.
There is one bike which is particularly bad with this sort of thing. With Vincents, everything is a special. It puts you completely at the mercy of the manufacturers' agents.