22-11-2023, 11:09 PM
I used the camshaft drive to achieve this because I couldn’t find a suitable version to run with a magneto.
I made a replacement camshaft nut that had a long 3/8“ (I think) extension. This went through a brass bush in the timing cover. The end of the 3/8” extension had a square hole in it (created with a needle file). The end of the brass bush was threaded to take a 90 degree angle drive, as suggested by Dave above.
The general arrangement is in this picture without the angle drive. You can see a grease nipple to add a little lubrication to the camshaft nose.
If you start with a coil engine cam you can machine the 3/8” extension directly onto the cam in place of the taper for the fan belt pulley, but you need to make a new front cam bush.
I made a replacement camshaft nut that had a long 3/8“ (I think) extension. This went through a brass bush in the timing cover. The end of the 3/8” extension had a square hole in it (created with a needle file). The end of the brass bush was threaded to take a 90 degree angle drive, as suggested by Dave above.
The general arrangement is in this picture without the angle drive. You can see a grease nipple to add a little lubrication to the camshaft nose.
If you start with a coil engine cam you can machine the 3/8” extension directly onto the cam in place of the taper for the fan belt pulley, but you need to make a new front cam bush.