Is it a Ficht with electronic ignition? If so, you need the software from BRP, a laptop with a serial port, a serial cable for the motor, and a timing light. It's really easy to do. You run the software in the test mode and select the timing function. When you go into this mode, the software locks the timing. It will then tell you where it thinks the timing should be. With the timing light on (connected to cyclinder 1), you watch where the timing light shows up on the flywheel. You then adjust the angle using the software to match what it actually is. There's a good explanation in the help section of the software.