Timing question

2 replies to this topic
  • darmino

Posted June 05, 2004 - 01:45 PM


How does the cdi Know when the engine is on the compression stroke and not the exhaust stroke when it fires the spark plug, it only fires every other revoltion right?. The reason I'm asking is bacause I have to reasemble my engine after some transmission work and when it comes to installing the cam's should I set them to compression or exhaust, both setting will be correct as long as the piston is at TPD but when will the ignition fire. There must be something that I don't understand. Please help!!

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  • wrooster

Posted June 05, 2004 - 05:06 PM


actually, it doesn't matter. the ignition fires the spark plug at TDC no matter if it's a compression stroke or an exhaust stroke. mark summed it up nicely in this thread:

also, you may want to check out

jim aka the wrooster
'01 wr250f

  • darmino

Posted June 06, 2004 - 06:12 AM


Thanks for the help, thats one less thing to think about!


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