Did mine from videos on YouTube. You must find TDC (Top Dead Center) first and set a mark accordingly. I removed all spark plugs and inserted a screw in stop on the number one cylinder to find the exact TDC. Make sure you ground all the spark plugs leads when turning over the engine.Buy a manual. I just did mine on a yamaha. Pretty easy if it's idle timing. You will need a timing light.. Seems the loctite had failed and screw had move over time due to vibrations.