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Poor man's ignition advancer,
No cost, just a little bit of time.......
So, how much should you enlarge the holes and twist the plate? Well the advance should be 3-5° and 1° is almost exactly 1mm on the edge of the plate. So enlarge the holes about 5mm. The best way to find the optimum setting is to dynotest the bike and try different settings. The advance units you can purchase, usually have a fixed setting of 5°. Be carefull not to over do it and listen for engine "pre detonation" which usually occurs at low RPM, high gear and high load. On an otherwise low tuned engine you could expect about 1-2 Hp in the midrange.
Diagram:
Now, what I did on my Kat in addition to the above, was I also scribed degree lines in the plate at 0 degrees, 2.5 degrees, and 5 degrees, and then used the engine block as a pointer. You can see on the right side where the lines are scribed. Most advancers run 4 to 5 degrees advance. I use 3 degrees. Note that this pic was taken at 0 degrees advance.
No cost, just a little bit of time.......
So, how much should you enlarge the holes and twist the plate? Well the advance should be 3-5° and 1° is almost exactly 1mm on the edge of the plate. So enlarge the holes about 5mm. The best way to find the optimum setting is to dynotest the bike and try different settings. The advance units you can purchase, usually have a fixed setting of 5°. Be carefull not to over do it and listen for engine "pre detonation" which usually occurs at low RPM, high gear and high load. On an otherwise low tuned engine you could expect about 1-2 Hp in the midrange.
Diagram:
Now, what I did on my Kat in addition to the above, was I also scribed degree lines in the plate at 0 degrees, 2.5 degrees, and 5 degrees, and then used the engine block as a pointer. You can see on the right side where the lines are scribed. Most advancers run 4 to 5 degrees advance. I use 3 degrees. Note that this pic was taken at 0 degrees advance.
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