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I've got a set of 34mm Mikuni RS on my bike (94 with a 96 B6 engine). I'm trying to get them adjusted correctly, but I'm having one heck of a time, especially since I'm not the brightest when it comes to carbs. Here's where I'm at so far.
I set all the float levels to 17mm, as I was told to do so by a couple different shops as well as people online. I'm pretty sure I did it right. Regardless, they're all the same now, and a lot better than they were.
My jet needle is on the 3rd clip I think, I can't remember right off the top of my head. I know it's where the stupid book that came with them told me to put it. Same deal with the main jets. I don't remember the size off hand, but it's what the book said. That's not where my problem lies anyway.
I did a manual sync on them, and that's as close as they're going to get until I get it to somebody to do the real job. I'm not touching that part, these are a P.I.T.A. to sync.
My air/fuel screw is 1/2 turn out right now. I think this might be part of my problem, as well as some of my confusion. I've heard everything from "you should be at 2 - 2 1/2 turns out" to "mine is set at 1/8 turn out and runs great". As far as I know, on these carbs, turns in makes it richer.
Now, my problem..... I finally got it started and all that. I was pretty stoked! The first thing I noticed is that sitting there not in gear, I can give it all the throttle I want with AWSOME response, but the RPM's kinda "hang" for a second, then come down pretty slowly. Am I wrong in thinking that's a lean condition? Anyway, I take her out for a test run, to see what's what. Cruising around kinda slow at first, not really getting into her until I was happy things were ok from the winter storage. Everything seems fine, so I grab a handfull of throttle. The only way I can explain it is like giving a cold weed eater gas, and it bogs down like it's going to die. Then if I let off it a little, then got back into it a little slower.... BAM!! Off like a rocket. I'm telling you, it pulls harder than I've ever felt up top. So I thought that maybe it was just loaded up a little and needed to be cleared out. So I pointed it in a straight line, snatched the throttle again, same result. If I "roll" into the throttle, no problems, I just can't snap it open if it's under a load. I can't even pull a hole shot off the line without it trying to die. Frustrated and confused, I call it quits for the night.
It sits in the garage for a couple days while I ponder things. I go back out Saturday afternoon to try again. Pull the choke, start it up, and let it sit running like that for a few seconds before I push the choke back in. As soon as I did, it started popping and crackling like there was a valve hung open or something, then it wanted to die. So I quickly pulled the choke again, and it settled down and ran like a champ, except for the plumes of black smoke coming from the exhaust everytime I'd give it any throttle. I let it run like that for about 2 or 3 minutes, then pushed the choke in again. This time, it would idle, but still did the popping thing when I gave it any throttle.
These are "new" carbs. I bought them brand new the summer before last. Put them on, never adjusted anything on them other than what the stupid book said, and they ran poorly for about a month before I parked it for the winter. Last summer, I never got to ride due to getting married, having a baby, and other life altering events. So this summer I'm determined to get it right. I've been through them inside and out to make sure there was no dirt, or fuel varnish or anything of that sort in them. Clean as a whistle. I'm just confused.
I've been told so far to raise my needle up a notch, and turn in my air/fuel screw a little to richen things up. Does this sound right? Thoughts?
I set all the float levels to 17mm, as I was told to do so by a couple different shops as well as people online. I'm pretty sure I did it right. Regardless, they're all the same now, and a lot better than they were.
My jet needle is on the 3rd clip I think, I can't remember right off the top of my head. I know it's where the stupid book that came with them told me to put it. Same deal with the main jets. I don't remember the size off hand, but it's what the book said. That's not where my problem lies anyway.
I did a manual sync on them, and that's as close as they're going to get until I get it to somebody to do the real job. I'm not touching that part, these are a P.I.T.A. to sync.
My air/fuel screw is 1/2 turn out right now. I think this might be part of my problem, as well as some of my confusion. I've heard everything from "you should be at 2 - 2 1/2 turns out" to "mine is set at 1/8 turn out and runs great". As far as I know, on these carbs, turns in makes it richer.
Now, my problem..... I finally got it started and all that. I was pretty stoked! The first thing I noticed is that sitting there not in gear, I can give it all the throttle I want with AWSOME response, but the RPM's kinda "hang" for a second, then come down pretty slowly. Am I wrong in thinking that's a lean condition? Anyway, I take her out for a test run, to see what's what. Cruising around kinda slow at first, not really getting into her until I was happy things were ok from the winter storage. Everything seems fine, so I grab a handfull of throttle. The only way I can explain it is like giving a cold weed eater gas, and it bogs down like it's going to die. Then if I let off it a little, then got back into it a little slower.... BAM!! Off like a rocket. I'm telling you, it pulls harder than I've ever felt up top. So I thought that maybe it was just loaded up a little and needed to be cleared out. So I pointed it in a straight line, snatched the throttle again, same result. If I "roll" into the throttle, no problems, I just can't snap it open if it's under a load. I can't even pull a hole shot off the line without it trying to die. Frustrated and confused, I call it quits for the night.
It sits in the garage for a couple days while I ponder things. I go back out Saturday afternoon to try again. Pull the choke, start it up, and let it sit running like that for a few seconds before I push the choke back in. As soon as I did, it started popping and crackling like there was a valve hung open or something, then it wanted to die. So I quickly pulled the choke again, and it settled down and ran like a champ, except for the plumes of black smoke coming from the exhaust everytime I'd give it any throttle. I let it run like that for about 2 or 3 minutes, then pushed the choke in again. This time, it would idle, but still did the popping thing when I gave it any throttle.
These are "new" carbs. I bought them brand new the summer before last. Put them on, never adjusted anything on them other than what the stupid book said, and they ran poorly for about a month before I parked it for the winter. Last summer, I never got to ride due to getting married, having a baby, and other life altering events. So this summer I'm determined to get it right. I've been through them inside and out to make sure there was no dirt, or fuel varnish or anything of that sort in them. Clean as a whistle. I'm just confused.
I've been told so far to raise my needle up a notch, and turn in my air/fuel screw a little to richen things up. Does this sound right? Thoughts?
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