I recently did a head gasket repair on my 1986 Kawasaki GPZ1000RX and now that everything is back together it starts up fine, idles fine, and revs high without a problem while in neutral, but when I put it into gear and started driving it it'll drive fine when giving it slight throttle, but when I get to the higher revs, or when I open the throttle too quickly it bogs down badly, and starts stuttering, but eventually starts revving higher and leveling out. It sounds as if my carbs were dirty or clogged but they were literally cleaned a day prior to me test driving the bike.
I previously cleaned the carbs thoroughly before the second time cleaning it and it had sat for a while after that so I cleaned them again and found a little bit of dirt and stuff, and after trying it out after I cleaned it the bike bogs down a little less, but it's still noticeable, especially around the 6k range. The bike also dies whenever I press the choke in while it's warmed up, even slightly. I tried starting the bike with the choke and it'll work until it warms up a little bit, then anything after that kills it.
This never happened before, only just now. Bike used to have perfect throttle response before taking everything apart, and now it just seems to be bogging down more. I'm sure I got the timing right, and everything is in order, just not sure on what could be causing the bogging down, unless a carb passage is blocked by a foreign particle or something.
Side note: the air box fittings are also a little warped and they don't fit completely over the carbs, this didn't affect the carbs much before but I'm.not sure if it could be affecting it now along with other things maybe.
Any help would be great, thanks!