Quote: Is it the 50 mm needle bearing a lot thicker than a regular bearing ? I don't know off hand If it is couldn't I just bore out the cam tunnel seems to me that the 50mm care are easier to come by my experience with the 1st R block being so old and they r3 a lot newer. If anybody's done is what would be the price on doing it Machine whys is it a real big deal ???
On my new R3 block it came with the 50m cam tunnel but I still had to have it machined to line it up and have the bearings fit.. the tunnel was a bit undersize.. I had to have the mains line honed also.. it was bad
