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Hey DreamV4, yeah, final post will be a succinct summary of the original symptoms, the fix, and why it worked.

Thanks for the detailed teardown/rebuild Screwloose. Well done!

Haters gotta hate...for what I don't know. No. See latest posts. No. See latest posts. Not "worthless" and your tone is pretentious. This forum is to help people and solve problems.

Hey Parminio, I think you had a great observation. This may have been evidence of a loose jet needle... A local shop found the problem to be just that - a loose jet needle. He couldn't recall which carb it was but I suspect it was carb #1 or #2 on the right side where that popping was coming...

Hey all, want to update about this mystery. I finally brought this problem to a shop and talked to them about this lack of power. They disassembled the carbs and found one of them had a loose jet needle. They corrected it and now the bike runs great. Acceleration is smooth through all the...

Hey, there's a trick Shane Conley does for quickly testing the integrity of the slide and diaphragms without disassembly. He gently sprays compressed air into 2 holes to lift the slide. I don't know what these holes are called. He does this on a carb that came out of a harley but i can see...

Thanks for the reply! I've heard of this method but I haven't looked into it too deeply yet. I made a table below that compares the symptoms between lvlheads bike and my bike. They don't seem to align exactly. Can clogged pilot jet (or jets) create different symptoms even though it's the same...

Ok, I'll do that. Is this the correct procedure for testing that? Ah, that makes sense. No I have not. I will do that as well. I'll do that if I have to! The thought makes me nervous. That makes sense. I have a stupid question. Is it possible to test each carburetor individually...

Hey Julian, Thanks for the response. I have never tested my ignition system. I replaced the plugs about 10,000 miles ago. Have not replaced the plug caps or HT leads. I don't know much about how to go about testing the system. I have a Clymer manual and a pdf of the Yamaha VMX12N, NC~K, KC...

Hey all, I'm really stumped about my bikes lack of acceleration. It's a 97' v-max with about 66,000 miles on it. It's a California model. I had the carbs cleaned and synced 10 months ago. OEM pilot jets and main jets were replaced (I think it was only the ones for fuel. I don't think they...

Hey guys, I have a 1997 with 65,000 miles. Stock suspension in the rear, progressive springs in the front with no lowering kit. Forks are filled with ATF fluid. The bike gets "wobbly" on sweeping highway turns above 90mph. It also wobbles on straight-aways above 105mph. (Both rear suspension...

Sprayed starter fluid around those connections tonight and didn't hear any noticeable rev increases. I'll try again tomorrow because I don't think I was being as thorough as I could have been. I took some slow motion footage of the needle jet diaphragms as I blipped the throttle a few times. I...

Thanks sdt354. I had the carbs cleaned and synced about 1,500 miles ago (10 months). Would it make sense to do a leak test first and then possibly perform the carb sync afterwards?

Thanks Traumahawk, it seems to be a lean issue. It does seem to do it more frequently after a cold start. I’ll be doin a leak down test as Fire-medic suggests.

Awesome. Thanks for the info Fire-medic. Guess I can rule that possibility out. I’ll do the leak down test first as you suggested.

I took some pictures of the intake above each carb in case that helps. Maybe there's a problem I can't see.

Collected some additional info in case it helps. Found this video: The guy describes a similar popping noise and said the "main jet fell out." I think he ment the needle jet was out of position. You can just make it out from the video he took...So I took a quick look at the "top" part of my...

Thanks Fire-medic, I'll check that out. How would a lean condition cause that pop to happen?

Hey y'all, This started happening fairly recently and it's got me scratching my head. What's causing this and how to fix? Thanks guys.

Thanks Edward. I didn’t have a proper flat file to do the job but I did find a razor blade. Was very careful and gently scraped all the old gasket off from both mating surfaces. I used 800 grit sandpaper afterwards to gently remove any remaining traces. I cleaned everything off as you suggested...