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07-22-2015, 06:27 AM
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#3 |
 
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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Mods will not make a 50cc a contender against even a stock 150cc. Mods to the 139(50cc), even BBKs, don't really give the 139 more top end. Fully modded, you'll be lucky to hit 50mph on flats.
A moderately modified 157(150cc) will hit 60mph, a highly modified 157 can hit upwards of 75 at very high rpms. Sadly, no matter what you do to a 139, it'll never take a 157.
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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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