Can someone copy and paste this information?? For whatever reason, I can't access the link provided.........
The 9 Step Program On How To Make Your Own Adjustable Ignition Advancer
It's easy and best of all, it's FREE.
Step 1: Remove the Signal Generator Cover (right/front engine cover).
Step 2: Remove the trigger rotor by removing the bolt in the center.
Step 3: Remove the 3 screws holding the ignition plate and loosen the plate.
Step 4: Enlarge the bolt holes in clockwise direction. *
Step 5: Reinstall the plate and trigger.
Step 6: Torque the trigger bolt to 25-34Nm/18-25.5lbft.
Step 7: Rotate the plate counterclockwise and tighten the 3 screws.
Step 8: Reinstall the cover.
Step 9: Testride time!
* How much should you enlarge the holes/rotate the plate?
Enlarge the holes ~5mm. The amount of advance should be 3-5° and 1° is ~1mm of slotting the plate.
A dyno test will find the best setting, but if you have no dyno and the motor is not highly modified, try 5° first.
Be careful not to over do it and listen for engine detonation which usually occurs at low RPM and high load (lugging).
On a basically stock (rejetted fits in this category) engine you may seet 1-2 Hp in the midrange, but mostly it's improved response.
Aftermarket advance triggers you can by have usually a fixed setting of 5°, so if you don't go any wilder with your slotting than that, you should be safe.
NOTE:Since Fast Larry's site keeps getting hacked or otherwise going off-line and this is a popular question, I'm going to put a copy of this How-To in the FAQ's