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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Optimum Kickstart Ignition Advance
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<blockquote data-quote="Oldhaven" data-source="post: 106477" data-attributes="member: 2879"><p>My Rapide is still buried in a snow bound garage up north right now. I am thinking about trying the attached curve profile on mine when I get to see it again next month. With triple sparks on starting the first spark is a single spark at 0* when it sees the TDC slot for the first time.</p><p>It has to be this way since the ignition needs this initial information to set itself. The next spark event with the current default program is three sparks at 12*, 5* and 0* BTDC if the kick is a good one and still rolling. With three sparks I cannot program that subsequent spark at 4* or 5* BTDC</p><p>as is recommended for Vincents in general since there</p><p>must be 5* between sparks for the coil to recover. With 2 sparks the</p><p>starting curves after the 0* initial spark could be at 5* and 0* BTDC.</p><p>It is possible to get two sequential spark events on a kick with a good long stroke.</p><p>This could be even more useful to those with a starter onboard. If the</p><p>encoder comes to rest between kicks because the bike does not start, the program resets itself immediately to its initial state to protect against reverse rotation causing problems with the encoder slot</p><p>count. If I put a manual switch into the sensor wire not used for the VOES I</p><p>could switch on a starting curve like this then switch back to triple</p><p>sparks after starting. It's worth an experiment to see if starting becomes more positive. I am also going to change the default curves to set the first triple spark at 10* rather than 12*</p><p> I think this "programming your own ignition" thing could be fun.</p><p></p><p>[ATTACH=full]26766[/ATTACH]</p></blockquote><p></p>
[QUOTE="Oldhaven, post: 106477, member: 2879"] My Rapide is still buried in a snow bound garage up north right now. I am thinking about trying the attached curve profile on mine when I get to see it again next month. With triple sparks on starting the first spark is a single spark at 0* when it sees the TDC slot for the first time. It has to be this way since the ignition needs this initial information to set itself. The next spark event with the current default program is three sparks at 12*, 5* and 0* BTDC if the kick is a good one and still rolling. With three sparks I cannot program that subsequent spark at 4* or 5* BTDC as is recommended for Vincents in general since there must be 5* between sparks for the coil to recover. With 2 sparks the starting curves after the 0* initial spark could be at 5* and 0* BTDC. It is possible to get two sequential spark events on a kick with a good long stroke. This could be even more useful to those with a starter onboard. If the encoder comes to rest between kicks because the bike does not start, the program resets itself immediately to its initial state to protect against reverse rotation causing problems with the encoder slot count. If I put a manual switch into the sensor wire not used for the VOES I could switch on a starting curve like this then switch back to triple sparks after starting. It's worth an experiment to see if starting becomes more positive. I am also going to change the default curves to set the first triple spark at 10* rather than 12* I think this "programming your own ignition" thing could be fun. [ATTACH type="full"]26766[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Optimum Kickstart Ignition Advance
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