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Timing advance


kcw125

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What kind of compression or domes do you have?

 

 

+4 is a pretty good proven amount of timing in stockish motors. Keep an eye on it and make sure it gets fresh fuel.

Stock heads. Only thing aftermarket is intake and exhaust

 

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+4* is normally safe. It can help make some more usable power.

Would a 3-4/degree advance still be safe if I put vf4 reeds on? Sorry for the qs but I'm trying to better understand timing. What type of upgrade would make a timing advance risky?

 

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not even close, it is advanced a lot.

Here is the stock timing curve built into the CDI.

So when you add +4*, you move that curve up 4* throughout the curve.

 

Ignition timing advance: 17°@1200rpm to ~22°@3500 then retard 10° every 5000rpm[/size]

 

cdicurvestock.gif

Cool chart, so Zilla does that mean looking at the chart you would take the line and move it up 4* from 0 rpm to 10,000, everything else remaining the same? Just trying to understand exactly how the timing effects the rpms..

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Note* check plugs after timing bump and reeds. You will be bumping up pilot and main a tad.

Thank u for the advice. I'm currently running 260mains with my exhaust and intake. Any ideas on what the main and pilot would be after I get the reeds and bump the timing?

 

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