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Dave, the way I see it, the rear of the crankcase where the plates mount is about 3-1/2" wide, as is the top mount on the transmission and the frame lug. The primary side plate has spacers welded to the front holes to shift the engine toward the timing side. The timing side plate has the same thickness spacer welded to the rear holes to match up with the front. Then, you've got the steel spacer between the crank case and the primary to bring it back in line with the transmission. The trans is shimmed tight to the primary side.The 3-5/8 I measured the other day is between the plates, not between the spacers.This frame was designed for this transmission, so no shimming of the trans should be needed on the primary side. The engine, on the other hand, was not designed to fit in this frame, and for whatever reason, the engine plates were shimmed to shift the motor a bit to the timing side. Are you sure the plates are flat, and you've got the front plates on the right way? I think the front plates only go on one way, but I kept careful note of which was which anyway. The frame lugs on the front could also have been modified to work better with the Norton motor - I know that was done on the P11 - so I don't think you can draw any conclusions as to spacer location on the front.
Dave, the way I see it, the rear of the crankcase where the plates mount is about 3-1/2" wide, as is the top mount on the transmission and the frame lug. The primary side plate has spacers welded to the front holes to shift the engine toward the timing side. The timing side plate has the same thickness spacer welded to the rear holes to match up with the front. Then, you've got the steel spacer between the crank case and the primary to bring it back in line with the transmission. The trans is shimmed tight to the primary side.
The 3-5/8 I measured the other day is between the plates, not between the spacers.
This frame was designed for this transmission, so no shimming of the trans should be needed on the primary side. The engine, on the other hand, was not designed to fit in this frame, and for whatever reason, the engine plates were shimmed to shift the motor a bit to the timing side. Are you sure the plates are flat, and you've got the front plates on the right way? I think the front plates only go on one way, but I kept careful note of which was which anyway. The frame lugs on the front could also have been modified to work better with the Norton motor - I know that was done on the P11 - so I don't think you can draw any conclusions as to spacer location on the front.
