Search results

I completely disconnected everything between the coil and the spark plug and swapped them for both of the rear cylinders. Yes, I understand that just swapping the plug ends would have messed up the firing order. I'd be surprised if the bike would have even run like that. I changed the #3 (right...

I swapped the rear plug wires from side to side with no effect--misfire still comes out the right muffler. Yesterday morning (upper 60s), the misfire was almost unnoticeable with the Vboost set to 3000rpm but in the evening (mid 70s), it was more noticeable. '99 VFR800, '08 1125R, '06 1050...

I've swapped the rear wires. Not gonna bother with the fronts--don't feel like trying to dig my hand up in there that far. If this doesn't make a change of some kind, I'm probably going to throw up my hands and take the bike to a shop. The rubber covers over the plug wires (not the plug wires...

When you says caps, wires and connectors, do you basically just mean the wires? There's the coil, then the wire, then the plug, so if I'm not changing the coils or plugs, it would just be the wires, right? '99 VFR800, '08 1125R, '06 1050, '03 Vmax, '03 DRZ400

Carbs have been synced and intake rubbers are all in good shape and firmly attached so I doubt there are any leaks there. Sync plugs (the little rubber caps) all seem to be firmly seated and not dry-rotted or anything. Haven't checked the Vboost crossovers yet.

Swapping coils and wires seemed like a good idea--right up until I did some reading about the front coils. There have been some descriptive terms for getting the front coils removed, and most of them involve foul language. During my most recent test ride yesterday, I noticed the following...

Plugs look good. I swapped the front and rear right side plugs (3 and 4). I also switched the front and rear left side plugs (1 and 2). I cleaned off all four slides with the 0000 steel wool. I then swapped the 3 and 4 slides and the 1 and 2 slides. Since 1 and 4 exit on through the left side...

Yeah, one of the carb slides was hanging up, but it was in the #1 cylinder which isn't misfiring. I went over it with some 0000 steel wool. I might as well do the other three slides too. '99 VFR800, '08 1125R, '06 1050, '03 Vmax, '03 DRZ400

With the Tboost set to open at half RPM, it will be completely open well before 5000rpm, when the misfire begins. How would having the Vboost open at idle make the behavior any different at 5000 rpm? Also, the Vboost all the time doesn't take into account that the misfire pretty clearly only...

I think 100% Vboost is just masking the problem. '99 VFR800, '08 1125R, '06 1050, '91 F2, '03 DRZ400

I raised the needles from #4 to #3 and that helped a little bit, so it does seem to be a lean issue. But I feel like raising the needles isn't the "right" fix since one particular cylinder is misfiring. IE I shouldn't richen up all of them since only one is lean. '99 VFR800, '08 1125R, '06...

Vboost appears to be functioning normally. During one of my troubleshooting sessions, I installed a Tboost. With the Vboost off, the problem is most noticeable. With the Vboost set to come on at the stock RPM (5500 or so), the problem is less noticeable but still pretty obvious. With...

This is a spin-off of my thread about jet size with the UFO 4-2 exhaust. http://www.vmaxforum.net/showthread.php?t=34504 My Vmax is an '03 with almost 19K miles on it. I got it a couple hundred miles ago from a previous owner who hadn't ridden it much in the past year. It's got the UFO...

I got another reply from Mike at UFO this morning. He recommended using some fine steel wool to clean the slide. Considering that the slides are at least $110, I'm going to give this a shot. Definitely a big thumbs-up to Mike and UFO! Here's what Mike had to say: "sounds like your getting...

Yeah.. I didn't keep the slides with their original carbs, but the misfire was the whole reason I took them apart in the first place. The other three slides move smoothly and snap shut with a solid thwack, so I don't think I made anything worse.

10 4, thanks. I'm pretty sure the slider body is worn/scored, though. I'm thinking about giving it a light once-over with some very fine steel wool. I figure I can't make it any worse--or if I do, I was going to replace them anyway.

I'll give that a shot, but.. if that helps, what's the fix? Obviously I can't leave the plastic screw loose.

I moved the slide to another carb and the problem followed the slide. The problem isn't the diaphragm--it's in sound shape, nice and flexible with no tears or holes. When I move the slide with my finger, it doesn't move smoothly--it feels like it's binding.

Last week, Mike left me a voicemail. (He's in Eastern and I'm in Central, and I wasn't up yet!) I sent him the following reply, which explains my findings: "Hi Mike, I got your voicemail last week--thanks for the call. I took your advice and raised the needle clips to the #3 position...

I replied to Mike that I'd thought I'd found the culprit--whoever had installed the K&N filer had overoiled it so excessively that it had leaked a small puddle in the bottom of the airbox and sucked a bunch of that junk into the breathers. I disassembled the carbs did and did a pretty...