JET,MAIN #230
137-14143-46-A1 (replaces 137-14143-46-00) this is what was stock.
230
I am pretty sure its 300 Stock main jets in a Banshee are 200 not 300
105 for the main on my two 1988 Bravo's.
Have you changed the main jet? Sounds like needle not seating fully or correctly.
hello If you look on the frame on the lower main rail for the vin number. Count to the 10th digit it will give you a letter and call the Yamaha shop with it and they will tell you. i have found this is true but my 10th digit is not a letter. jy4ag02334c018003
main jet#370 pilot jet#50 throttle valve#2.0 needle jet Q-2 hope this helps you.
Too much fuel, take off air box lid. Then try a few plug chops. Then try a larger main jet ( the jet that controls throttle from half to full)
is that the only mod done to this quad? if so then i recommend getting a kit and changing the main to 280 then doing a plug chop. most likely you will need to lower it a size or to to about a 270 with the needle in the 4th position. stock main jet is a 240
common stock, preferred stock, stock split
250
Stock main jet on the 2004 yfz 450 is 158.
80