So the boyer plate and stator have been removed and reinstalled.
I think somethings gone awry with the timing along the way.
The engine rotor set to wrong scribe line, degree wheel check for 31 against the cover scale or the reinstallation of the boyer stator & plate.
couple notes I have about using a degree wheel:
- Mount your degree wheel and pointer, put the bike in gear and turn the rear wheel until the left piston is in its compression stroke and at its highest point. You can find the compression stroke by putting your finger over the spark plug hole and feeling for air being pushed out. Roll the piston back down enough to install the piston stop. Roll the piston forward until it contacts the stop. Record the degrees from the degree wheel. Turn the wheel in the opposite direction until it contacts the stop again. Record the degrees on your degree wheel. The distance exactly between these numbers is TDC. Remove the stop and turn the rear wheel until the piston is at its TDC location, turn the wheel to back the engine to 32-33 before TDC and carefully bump it forward again to 31 degrees for the Boyer static timing at 31 BTDC. Remove degree wheel and install the primary cover to read the degree plate where the alternator rotor mark is at. This is true 31 degrees BTDC. Record this number and use it to strobe the engine.
Example: 34 degrees read on degree plate is actually 31 degrees. Strobe to this 34 degree mark for 31 degrees.
- You can attach the degree wheel in any manner that works so it doesn’t move as the engine is rotated.
On an 850, a 3/8 drive 10mm socket I had worked fine by simple pushing it on, it had a tight enough friction fit.
- Use a wire as a pointer.
If you are doing this for a Commando, don't leave the crank at TDC as you mount the outer cover. There is no reference for TDC on the scale, it goes from 20 to 40, so after you are confident you have the wheel "calibrated" to 0 at TDC, use the pointer (which you've been careful not to disturb yet) and turn the crank to 31 BTDC. Now you can remove the pointer, and holding the crank still, remove the disk, remount the outer cover and see if you are reading 31 on the rotor's mark.
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