slow to accelerate until 5000 rpm
Im pretty sure i know whats wrong but id like to get some opinions before hand. Ive got a 91 vn750 with cobra pipes and ear shave. Currently im using size 38 pilots and 140 main jets. The carbs are synched and there are 2 washers under the needles. Carbs are completely rebuilt with all new parts. Ive had air screws anywhere from 1.5 to 4 turns out. When taking off from a stop the bike is slow to accelerate and it feels like quite a load on the engine. When the bike reaches about 4k rpm it stutters for a little bit and when hitting 5k it takes off like normal. This happens in all gears and even while not moving. I think I need to go up a size or 2 on my pilots jets but I just want a second opinion before ordering. Is it possible that I am still lean in fuel. My house sits at 500ft above sea level. Any suggestions.