stumble

So, I'm a brand new European member but I've roamed around this forum and still I'm unable to fix my bike: I've bought an cursed 85 restricted French Vmax, site unseen, and worst of all, sent a buddy of mine to check and bring the bike (since he was a veteran rider and I've assumed he would...

Hello all, Well I finally started to troubleshoot my 85' Max (29,000 miles) and could use some advice. It was great a year ago when I bought it, now it gradually got to this point. Bike is completely stock except drilled muffs. It hesitates at WOT. (when i'm expecting the boost to kick in...

I think I picked up some crap fuel in one of the small towns I went through. I got a slight stumbling under 2k rpm. Plugged pilot perhaps. ? Did the pea shooter method...no change. Is there a simple fix, or carb removal time.? Once its above 3k, it runs clean. It idles fine as well...

When I throttle over 1/4 to 1/3 and the bike is under 2500 rpm it will stumble and almost make a tst tst tst sound while giving zero power beyond the amount it starts to stumble at. I've also noticed that it will do the tst tst sound when i go past about 1/3 choke. Any idea what it could be?

Hello! I've been running a stage 7 setup with vboost eliminated for some time. WOT just fine. I installed the vboost assembly recently, without making any other changes, and now have a bad stumble at 4K WOT. Should i drop or raise the needles?

So ive been though the carbs. Dissasembled cleaned, set floats. I have not synced them yet.The bike works great. Except cruising down the highway. I can ride at 4000 rpm for 10 minutes or so no problem. After that if I Give it a little throttle she stubbles then pulls. if I wack it to wot...

Help please,My 86 seems to be running fine under normal use but if I take off from a dead stop and really crank the throttle open it stumbles an acts like its not getting enough fuel to it.i drilled my brass plugs out and have been tweeting them(since this condition started)but it doesn't make...

From about 2-3k, I've got a stumble at wot. It seems probably rich, as it kinda breaks up part of the time, and riding without the airbox cover clears it up somewhat. I've leaned out the needle, and it helped some, but didn't take care of it. I've got a muscle jet kit and full exhaust. 157.5...

Ihave a 97 Max that runs a little glitchy at 3000 - 4500 revs, I have shotgunned the carbs replaced plugs / leads caps, sorted charging system, replaced airbox rubbers and done all the recommended checks for vacuum leaks fuel filter and so on, diaphrams look fine, needles stock, tried two tanks...

hey guys did a couple hundred miles this weekend and noticed an issue, which i think is carbs. around say 2.3krpms - 3k rpms with low accel to WOT (not at cruise) the bike stumbles a bit. from what i know (which aint much) it almost feels like its going lean. turning the choke on helps, so...

So i got my bike all figured out which is bone stock for the motor. I put a marks exhaust on my buddies bike and did everything i did and he has a low end stumble from idle to about 3K. You can hear it kinda sputter and miss. Its an 04 with about 8,000 miles and ran great before. I shimmed...

WARNING LONG WRITE Well im still having a horrible 4k stumble, regardless of gear im in anything over 1/4 past 4k and it falls on its face and stumbles its way to 6k where it pulls hard. I have stock needles, but the PO drilled the slides. Ive tried shimming the needles with .4mm...

I did the shotgun recently because the idle circuits were clogged. Problem is now gone, but I have noticed i get popping/stumble out the exhaust during high rpm shift from 1st to 2nd. It stumbles for half a second or so and then continues to pull hard. I roll off the throttle when I shift...

So... I went out for a late night cruise the other night. The air was cool, the roads were empty. It was perfect! Except I had a deceleration pop. This started a week ago when a bunch of us locally got together and did some card tuning and installed some parts. One of the guys had a smaller...

g'day long time lurker first time poster and let me say what a great site and wonderful resource.anyway i need help with a carb problem.after fitting carbs with morleys jet kit and 2in1 2in1 hmf full exhaust i get a stumble just off idle to about 2000 rpm also when cruising at very small...

Hey Guys I was wondering if the big cams I put in would cause me to get lean stumble at idle when the bike is warmed up? :confused2: Here is what is going on. I have the A/F meter hooked up that verifies what is going on. When the bike is cold at idle I am seeing 12.8-13:1. I could probably...