Modded bike main jet size

BobbyS

New Member
Oct 20, 2018
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First of all I’m new here so excuse me if this question has been asked a thousand times. I just picked up my second blaster. This one has oil injection delete, k&n air filter, air box lid removed, and full Toomey exhaust. I just need a rough estimate on main jet size to start testing with. I don’t really want to buy every size and test all of them and chop up a 100 plugs. Any feed back is appreciated!
 
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Toomey recommends a 310 main for their pipe with a filter and their airbox lid vents, I'd buy 330, 320 and 310 mains
start large and plug chop down. this could increase @ lower elevation and temps.

no need to chop up plugs, look down in with a flashlight and magnifying glass to see the smoke ring color, although once used for plug chops a new one should be used for the next chop, at least the plug can still be used for running once jetting is confirmed