StryfeS13
Active Member
The model of the carburetor is a BS36SS CV Carb.
Hi guys, I'm building a GN400 and I'm desperately trying to figure out the jetting/problems I'm having with my carburetor.
I tried running a VM36 but I could never get it to not be rich (went all the way down to a 15 pilot and still smokes black), so I put the stock carburetor back on. The bike has an emgo cone filter, and a pretty much straight through exhaust. The problem I am having is that it will pop through the exhaust and shoot out flames.
I completely disassembled the carburetor, soaked it for 24 hours in the solvent tank at my work, blew EVERYTHING out with compressed air and reassembled it. When I pulled the needle out, I found 3 O-RINGS under the clip that the previous owners placed there, which obviously were making it super rich. I removed them and put the needle back in how it's supposed to be, which I found out by following the exploded diagram on our parts fiche at work.
I started the bike up like this (completely stock carb, totally clean, everything perfect), and it will only run on choke or half choke, with no response to throttle except popping and banging. When I try to take it off choke it will die out immediately. The pilot is not dirty, neither are the passages. I also checked the slide diaphragm for rips/holes and there are none at all. I have also checked and set the float level, etc.
It still has the stock jets in it, 42.5 pilot 132.5 main. I have tried a 140 main and it made no difference in the way that it runs either.
I am SO confused haha...can anyone help? Oh and none of this happened when I was using the VM36 carburetor. It ran O.K. but just super super rich - black smoke. So it IS the carburetor causing this issue.
Hi guys, I'm building a GN400 and I'm desperately trying to figure out the jetting/problems I'm having with my carburetor.
I tried running a VM36 but I could never get it to not be rich (went all the way down to a 15 pilot and still smokes black), so I put the stock carburetor back on. The bike has an emgo cone filter, and a pretty much straight through exhaust. The problem I am having is that it will pop through the exhaust and shoot out flames.
I completely disassembled the carburetor, soaked it for 24 hours in the solvent tank at my work, blew EVERYTHING out with compressed air and reassembled it. When I pulled the needle out, I found 3 O-RINGS under the clip that the previous owners placed there, which obviously were making it super rich. I removed them and put the needle back in how it's supposed to be, which I found out by following the exploded diagram on our parts fiche at work.
I started the bike up like this (completely stock carb, totally clean, everything perfect), and it will only run on choke or half choke, with no response to throttle except popping and banging. When I try to take it off choke it will die out immediately. The pilot is not dirty, neither are the passages. I also checked the slide diaphragm for rips/holes and there are none at all. I have also checked and set the float level, etc.
It still has the stock jets in it, 42.5 pilot 132.5 main. I have tried a 140 main and it made no difference in the way that it runs either.
I am SO confused haha...can anyone help? Oh and none of this happened when I was using the VM36 carburetor. It ran O.K. but just super super rich - black smoke. So it IS the carburetor causing this issue.