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Iridium plugs do theoretically have less resistance, and iridium is stronger and more heat resistant than platinum.
That said, they offer no noticeable difference in performance when used on a gy6 at all.
As to the modded CDI, good luck man. I find your experiment a waste of time, as simply adjusting timing would accomplish the power gains you seek. Also I highly doubt a modded CDI will help with the enrichment and aid in cold starting at all.
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2011 Roketa MC-23-150
4T 150cc 157 qmj
24mm carb w 115 main jet and paper cone air filter
Manual petcock w Tygon fuel lines
Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust
RED spring clutch
Adjustable CDI (brand unknown, it's blue and red and works great!)
KOSO high performance variator w 12g sliders
Gates Powerlink 835-20-30 belt
GPS verified 65mph on flats.
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