Miatav8,MstrASE,A&P,F wrote:
I understand practical considerations but I want to mention this in case you want to make a change down the road. There are some issues with the driveline that can cause rumble/tramp vibration through the car.
The guzzi uses a double cardan joint in the swingarm. Since the cardan is a cv whose operating angle cannot be adjusted to counter a standard ujoint operating angle at the other end of the shaft, the output should also be a cv since it wouldn’t be practical to rotate the rev box output shaft to point directly at the pillow block.
The rev box input should be a cv and the trans output should be a cv because the joint angle is greater than 1.5 degrees, limiting shaft rpm.
FWIW, the triking reverse box uses standard 1140 flanges. Since you already have flange yokes, it should be easy to fit double cardans at the rev box and another guzzi swing arm double cardan at the trans output but this would make the driveshafts too long.
I’ve seen odd yoke phasing before like Horcha mentioned a while back, used on steering shafts but not drivelines. I think it may be a bandaid to minimize the problem of the operating angle being too great. Time will tell. Leave yourself enough room for three double cardans just in case you want to change it later. Loctite the grub screws on the pillow blocks so the collars don’t ever slip on the shafts and wear them down, causing a vibration.
The whole drive line came from triking, minus the swingarm. It is what they use on all of their models.
Spike