Blaster 240 main jet size? HELP

jeff1.8t

New Member
Sep 25, 2013
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Have a Vito's 240cc kit, mild port and polish exhaust port, dg full exhaust, power reeds, Vito's degree key, open filter with stock carb. What size main jet should I use??? I'm aware I need a bigger carb but still wanna know what jet for stock carb.
 
#280, #290 if you premix at 32:1, depending on temp and elevation.

Plug chop to confirm.

My choice of pipe, DMC Alien, best low/mid pipe around.