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Message: [QUOTE="jaguar, post: 793119, member: 19340"] Well, I received the timing light and put it to use on my KDX. What I saw is that the timing progressively advances from idle all the way to maximum advance around 3600rpm and then starts retarding (going more toward TDC) more and more with higher revs. The following data is from my KDX with a rewound stator coil which affects the timing, but probably the same amount of degrees all the way thru the rpm range. I will be receiving a used coil to test in a couple weeks. But anyway this test does show the relative effects of timing cap change on the timing curve. 4.7uf is the standard value of the timing capacitor in the CDI. I added .5uf and 1uf to it for the following 3 values of timing cap. The readings (in degrees BTDC) under SR are from a standard CDI for my international version of street-ready KDX which uses a 4.7uf cap but a lower value of thermistor (which is in series with the cap). rpm 4.7uf 5.2uf 5.7uf SR ----------------------------------------- idle 19 19 19 17 3600 23 21.5 21 21 6000 19 19 18 19 Ideally I should of tested the timing at 9000rpm also but I didn't have the timing light that also reads the rpm. Instead I used a circuit and then a frequency meter which I had to the side and didn't want to hold the revs so high long enough to get a reading which was more complicated from having to look at two places. Also it was hard to rev it to 9000 and keep it there. You can see from the results that the biggest change was midrange although from experience either of the modified CDI's gives me better midrange and top end. I was practicing a couple weekends ago with the 5.7uf CDI and the bike was running hot and so I raised the needle 1 clip position to richen the mixture a bit. After that I experimented with using 5.2uf and on street runs I felt it gave me equal results and probably doesn't let it run as hot on the MX track. [/QUOTE]

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