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Old 05-03-2012, 09:20 AM
multipaul multipaul is offline
Motorized Bicycle Senior Member
Join Date: Mar 2012
Location: Germany
Posts: 75
Default Re: Getting all 3 Horse Power out of your GT-5 Sky? (tear down)

While Recon Chris is dremeling, a few infos about my stock cdi. There seems to be a lot of different informations about an optimal ignition timing and stock cdis. My engine is from 2010. The magnet is very strong. It must be a neodym (and I can verify that). The ignition timing is, as I expect it for a twostroke.

500rpm 10, that's good for easy starts
700 12
900 15
1200 18
1600 25
1700 25
1800 25
1900 25
2000 25
2100 26

23 to 25 are normal values for such engines.
At the moment I have no possibility to measure at higher rpms.
Who has ever measured at higher rpms?

I know, that topic belongs to another thread.
Measurement is my third hobby.

@Recon Chris, this is a great thread and you made a very interesting work. Sorry that I didn't find it earlier.
I'm not sure, but I'm afraid your 4mm aluminum plate will dissapoint you.
Your transfer ports will be open about 140 and the exhaust about 166.
IMHO that doesn't match.
You will loose lots of power at the bottom end. Could be you have to pedal behind every red traffic light. But let us see.

I wish you best results - multipaul
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