Well took it off and clean that was about it.
ive suffered the bad vibrations and i found this fixed ithttps://youtu.be/Eab_beh07HU?t=25s
Did you try riding it with a bit of choke? Did it make it run worse or better? You're using the choke to try and figure out if it's running too rich or too lean. That will tell you where the problem is. If you want to test if the old air filter is the problem just take it out and go for a short spin to see if there's an improvement. If there is then the filter is blocked. I'd be surprised if it was the filter just because it was ok before you did the carb work right? So it should still be ok unless you blocked it somehow. 1/2 a turn on one mixture screw wouldn't be enough to cause a big problem. They're an adjustment point they don't have to be exactly at 2 1/2
ok so going through everything im going to start with your cracked carbswere they cracked all the way through or just the outside?all should make sense if they were through and were leaking UNfiltered air in and the previous owner has increased the pilot screws to let more fuel through to richen up the lean conditions caused by leaking inlets (we good so far)if there is now no UNfiltered air going in the inlets anymore it draws it through carbs so increases the negative pressure/flow rate in the carbs and in turn the airbox which means more air is needed to flow through the air filter than previously, so a blocked air filter may be to blame here (and would actually make the UNfiltered air coming through the old inlets even worse)so a combination of things will be causing you issues hereyou have already replaced inlets -should only be filtered air now1. running rich as pilot screws are allowing too much fuel to flow screw them back in a bit to factory2. air flow is restricted causing a negative pressure which sucks up more fuel making run even richer - pull air filter and replace (worth doing anyhow)this is just the things that are popping into my head as i read all the problems that you are systematically going through which is the best way
If the choke made it worse it does suggest it’s rich. A blocked air filter could cause that so the new air filter is the place to start. If that doesn’t fix it the next easiest would be to check the choke plungers are all returning correctly. If they’re all good as punk said there’s a chance that the last guy lowered the retaining clip on the jet needle which raises it and allows more fuel through at part throttle. So next would be to check the position of the clip on the jet needles. I think position three on is standard.A few other things that could cause rich running would be if someone’s put bigger jets in, if the jet needles and emulsion tubes are worn but I think that would need fairly high mileage, float heights not set right but that would probably make it run badly everywhere, o-ring under the float needle seat leaking but again that would probably make it run badly everywhere, mixture screws but they seem to be fine. I think the most likely culprits now are the air filter, choke plungers or jet needle position but hopefully the filter does the trick
On a Fazer the mixture screws adjust the amount of fuel at idle not the amount of air so if you turn them out it'll make the mixture richer. If you turn them in it'll make it leaner. If you're at 3 turns out you're making it richer. You're thinking the problem is it's running rich so put them back to 2 1/2. To check the choke is working. If you pull the choke lever and look at the carb you'll see the choke plungers moving in and out as you pull the lever. They're on the engine side of the carb at the top. They're brass plungers. Check that they're all moving together and closing fully. Something I think you should do is take the bike for a spin and when you get back throw some water on the exhaust header and see if they all dry at the same rate. If they all dry at the same rate then the problem is likely something affecting all cylinders if one dries at a different rate to the others then that suggests it's a problem that affects just one cylinder. Another easy thing to do if you haven't already is trim the ends off the ht leads they corrode and can cause problems.