Bansheefamily1

Rdz head, wicked intake, 421 driveline high port, v force 3 reeds, 35mm pj’s 158 mains with 25 pilots, slp pipes, stock stator with advanced timing plate, 1 turn out on air

I have an issue. I just recently got a banshee with a 421 drive line high port top end. I’m in the third tank of gas. It has 35 keihin carbs with 158 mains. It is a little rich on bottom end Perfect in the middle and according to the plug chop it is perfect up top I mean perfect but when I get in the upper rpm range it has that lean feel to it if that makes any sense (revs smoothe the last little bit of throttle). It dosent fall flat it just seems to loose power in the last 1/4 bit of the throttle in 5th and 6th like it’s running out of fuel mainly 6th. Fuel supply be the issue? I have a pingle valve. Should I go with bigger carbs or get bigger bowls. The bike is absolutely unbelievable on low end and mid range but top end leaves much to be desired