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Post by scooterted on Nov 14, 2019 9:42:23 GMT -5
More specifically, what do you do with the throttle after killing spark?
What i mean is, you do your pull, kill spark, stop quickly (because a scoots clutch stays engaged until you slow down), do you allow the throttle to close? Or keep it open until the engine stops turning?
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Post by jackrides on Nov 14, 2019 10:29:18 GMT -5
Close throttle. Won't alter color, but why not have a dryer plug.
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Post by 90GTVert on Nov 14, 2019 13:33:30 GMT -5
Shut off engine and shut throttle. Brake so the engine actually stops and then coast into the driveway. Cut plug apart to look at mixture ring.
That's all for a 2T and only when I'm otherwise unsure or lost about what it needs. For a 4T, I just go through a trial and error tuning process, recording data along the way to make a decision. They aren't volatile enough to warrant plug chops to me.
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Post by Zino on Nov 14, 2019 18:13:39 GMT -5
Plug chop 101
do some wide open runs with a range of jets start biggest to smallest note top speed and any hesitation or bog on each jet.
After finding a main jet that you feel has best top speed performance .
Warm up the scoot for 5 minutes or so at least until the choke shuts off with a old plug .
Swap in a new plug
Go wide open for about a mile or so Its where I can pull over at my buddy's shop .
Hit the kill switch and close throttle coast to a stop and swap out the plug .
Take it home saw off the threads and look for a 2 mm light smoke ring at the base of the plug to verify I'm in a safe range .
When you get better at this you can use a light and a magnifying glass .
If no ring or smaller than 2 mm ring go to a bigger jet and retest.
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Post by nelson on Nov 14, 2019 20:19:45 GMT -5
Wot then kill it with wot. Cut threads off in vice with hack saw
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