KOTM Feb 2009 Mat0302

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Katana How-To's & FAQ's A forum filled with write-ups, FAQ's, and visual aids for
mechanical & cosmetic modifications to your Katana.

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Old 03-07-2005, 12:26 AM   #1
Kat Champion
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Default Poor man's ignition advancer. Do it yourself

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.


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.

MSgt, USMC (Retired)

Last edited by meanstrk; 03-10-2009 at 01:53 PM..
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Old 03-07-2005, 12:34 AM   #2
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Thanks bro, good info!
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Old 03-07-2005, 01:56 AM   #3
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good thinkin, thanks for the info! I'll stickify it for awhile !
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Old 03-07-2005, 02:55 AM   #4
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Why did I think of that. Good info bro.
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Old 03-07-2005, 04:20 AM   #5
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Does it only work on kats or all bikes?
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Old 03-07-2005, 05:36 AM   #6
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It can work on any bike that has a rotating advancer and stationary pickup and a backing plate that can be removed. In effect, it's like rotating a distributor on a car.
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Old 03-08-2005, 08:59 PM   #7
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Won't advancing the timing increase popping thru the exhuast on decel, or does it just effect top end?
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Old 04-15-2005, 04:53 PM   #8
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I had an idea to go along with this... Couldn't you just enlarge the size of the gap on the back of the OEM rotor by 5 degrees or so in the correct direction and re-attach it? This would be much easier/cheaper to fix if you mess something up, and I'm sure any machine shop could take care of it in 20 minutes for $10-20.
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Old 06-28-2005, 11:01 AM   #9
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The only problem I've seen with this method is its REALLY tough to find 1 degree differences using this, as its adjustable.

You can get the good ones for only $46 delivered to most states...............as an alternative! 8)
I've owned over 70 Katanas - you think I know anything about them?
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Old 11-07-2005, 11:20 AM   #10
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i'd like to do this mod but unfortunately the pictures don't work so i haven't got a clue????
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