November 26, 201114 yr HI Guys. Todays dumb question is timing. I have learned to set 21 BTDC with a spark plug dial gage. I was wondering if anybody has ever bothered trying something less in the 10 to 20 degree range. My reasoning is that I spend a lot of time riding in the idle to 2500 rpm range and 21 degrees is a compromise between fast runing and slow running motors. I am always trying to run slow as possible with little or no clutch so why not run the timing a little closer to TDC? 10 degrees? 15 degrees? Am I barking up the wrong tree? Edited November 26, 201114 yr by sempergumby
November 26, 201114 yr HI Guys. Todays dumb question is timing. I have learned to set 21 BTDC with a spark plug dial gage. I was wondering if anybody has ever bothered trying something less in the 10 to 20 degree range. My reasoning is that I spend a lot of time riding in the idle to 2500 rpm range and 21 degrees is a compromise between fast runing and slow running motors. I am always trying to run slow as possible with little or no clutch so why not run the timing a little closer to TDC? 10 degrees? 15 degrees? Am I barking up the wrong tree? Not a dumb question at all. Yes some people run with less spark advance than standard on trials bikes, especially on large capacity motors. The standard setting is only a guide. Why not try it and see what you think. The motor will run even with the spark after TDC so you can experiment to your hearts desire. To start with I would try 10 degrees BTDC and see if you can feel the difference. Remember to test for the effect on high RPM performance as well as low RPM response.
November 27, 201114 yr my experience with my Cota is retard tends to make it hot and any advance makes it a mongrel to start
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