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Carb help. Need advice

1152 Views 5 Replies 2 Participants Last post by  Monolith
Hello everyone. I really need some guidance with a situation I have going on. I have a 96 gsxr750 with a KN filter but I believe it’s the original box. I have a Yoshimura RS-3 exhaust I have cleaned the carbs before on the bike and put them back together with no issues other then not being perfect due to syncing might be off without the right tools. Carbs were 132 outside and I think 130 inside. So I bought a all balls racing carb jetting kit to get it back down to stock. So I replaced everything other the the carb bodies. The needles that were in there had notches and the new needles don’t. The jets are 127.5 factory and everything else it’s supposed to be. Air screw is two turns out.
so the problem I’m having is it’s running like crap. Blowing a crap ton of smoke. Really when you rev it. Idle runs like crap and if you go to give it throttle it bogs down orwill die. If it doesn’t die it will pop but mostly blows smoke.
So my question is... should I go back to the jets I had in there or stick with stock?
Should I replace the needles to ones that have notches to control them better. I’m at a total loss of what to do and I feel like I’m chasing my tail. I do have videos of it running if that would help someone understand how it sounds and what it is doing. Please help
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Thank you so much for all that Info. I starting to feel like this is something I should have never messed with. Now I’m going to be pulling them apart since I pulled the kit out- cause I keep all the old stuff. Discovered jets in. 4 125 and 4 127.5. So I guess for some dumb reason I left the 130 and 132 jets in the carbs but put the new needles in it. I was very careful with each carb so I have no idea why I would have done this. So now it sounds like I’m going to need to dig into them and figure this mess out. I do have two videos on how it’s running if someone will give me their number so I can send it to them since the forum will not allow videos.
Ok so I got the bike back together and I swear it’s one step forward two back. While I had everything torn apart I check all four plugs and they all are firing. Put them back in. Got rid of the new jet kit and put the bike back to the way it was. Interesting that cy 1&4 are 130 while 2&3 are 132. Anyway. Go the carbs back on the bike. Two turns out. Fired it and it sounded way better. Noticed the fuel line was dripping so I pulled it back off and fixed it Then when I went to start it I forgot to plug in the little solenoid that sits on the back of the carbs that’s hooked to the vtv valve or whatever. Not sure what all that does with those vacuum lines. When I went to start it fuel started shooting out the top of the carbs and pour out the line that connects to the air box in front of the carbs. It did all this once the fuel pump primed. Anyway I then pulled the plugs just in case fuel got into there and I didn’t want to cease the engine. Yup Gas shot out of the cylinders once the spark plugs where pulled.
Now what I don’t understand is why I’m getting fuel everywhere. Someone said my floats might be sticking but I just cleaned all that out. Could it have been that little valve not not being plugged it. Once it did it once I noticed it wasn’t plugged in and I did plug it back in but gas still poured out of that air box hose. I’m at a total loss
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