backfire

I have a new to me Vmax1200 with the 4-4 Cobra Exhaust on it. I know...I know it sucks. I hate how it looks and sounds but it's what I got right now. Planning on a 4-1 full exhaust and an S7 or Muscle kit this winter. For now, I have an idle problem. It backfires and lean pops on the rear two...

Good morning... this has now happened twice so I thought Id ask. I turn on the key and without touching the starter I will immediately get a single fire from one of the cylinders. It doesn't backfire though the intake its just a quick single poof through the exhaust. Anything to worry about?

Well I got my 2004 Vmax a few days ago.I haven't riden in 25 years and was surprized on how nervous I was.I've only been around the block a couple of times.Last time out I heard a noice that seemed to coming from the front end.For lack of a better word it sounds like a chirp.I checked out the...

Mostly after the bike had sat overnight or even for a few hours but when I choke it a little and start it it shoots off a gunshot loud backfire.i imagine it has something to do with the carbs.ideas?

Hi from Texas, I am almost done with my Vmax. It is a 97 and when I got it, it was running on two cylinders. I cleaned the carbs, cleaned the tank, put a fresh inline fuel filter in, checked timing, checked all electrical connections and put a new batter in. It just wont start! I'm not sure...

Ok guys. I performed a little maintenance on the max and installed new plugs, COPS, and a shotgun procedure. My max ran fine before the work. After initial startup idle was fine. All was good until the ride to work. After about 2 miles the popping began. Nursed it home after work "discouraged."...

Hello All, I have had an ongoing issue with my 1997 V-Max which “I think” could be related to my installed Supertrapp Megaphone series slip-on exhaust system, but at this point, i'm not sure.... When I first got the bike several years back, the supertrapps where already installed and the...

Hi, I own a 98 vmax and I"m having some backfire issues. When coldstart with choke on it backfires untill choke is off, then it runs ok. When warm it only backfires on decelleration. What could be the problem? I synced the carbs with carb pro. What could be the issue, a/f mix or vacuum leak (I...

Help! New to the forum, don't know what I am doing. I have a sick vmax that is backfiring so bad you can,t ride at all. I tried another used igniter and also another set of coils but still the same. Any suggestions?

Started up the Max the other morning and I noticed it was backfiring a little with the choke on and I saw small flames inside my 4into one exhaust.Has this happened to anyone else here?.It goes away as soon as the bike warms up.:confused2:

Ok, so Mark and I seemed to get everything going just fine (carb sync) and all was well, I didn't touch anything else and then I was getting a slight backfire at idle or deceleration. You can hear early and several times in this short video the "chirping" that will sometimes kill the bike as...

Hi, This summer I added a Mark's 4-2 exhaust and Morley Muscle jet carb kit overhauling the carbs. Immediate increase in power was observed, along with some very minor popping at 3-4k in 1st, 2nd. Being an expert in denial, I ignored the symptom. Weeks later the popping became worse...

I placed this topic under general because I'm not sure, although I have an idea of where the specific problem lies. I just bought a 2005 VMAX anniversary edition. It has 9000 miles, always garage kept and looks brand new. When I bought it, it ran perfectly without any issues and I decided to buy...

After going to the dyno this morning and finding out I was a little lean in the mid-range...realized I needed to shim the needles. Followed the how-to on here...got the radio shack washer pack, mic'ed at .019. Added 2 washers between the nylon and the retainer clip, making sure to push the...

So since the beginning of this season I have had this annoying backfire on decel. I figured that after the winter my carbs needed either some running time (haven't had much of that) or the shotgun/peashooter (haven't had much time for that either). Well, yesterday I finally got some down time...

When I accel and let off throttle a bit as I'm switching gears I'm getting some backfiring. Have'nt had this before..what should I be checking?

I'm experiencing a little hesitation and backfiring. It happens with low-mid throttle. WOT appears to clear it up. Idle is perfect. The current combo is Dyna3000 (Curve 5)+Mark's 4-2 Exhaust+Sean's Jet Kit w/ 157.5 I just put in mid-octane (89/91) gas instead of regular since I have the...

hey I have just picked up a 2000 MAX and that has been sitting for some time I cleaned the carbs and and it runs great, but it has few issues! 1 it has a slight popping (small back fire) when I let off the gas. 2 the mpg really sucks its about 92 miles then my res. light comes on. This is my...

I had rust in the fuel tank which clogged the fuel filter, etc, etc. After sealing the tank, I removed the carbs & cleaned all the rust from the float bowls. After re-installing them, it runs terrible. Idle goes from 3000 RPM down to 1500 & back up. When it idles down, it pops through the RH...

I just went to lunch and on my way back I heard some small carb backfires, at the same time I heard some louder tones coming out the right pipe. I don't want to call them backfires because it just sounded like a much louder exhaust note, kind of a "womp womp womp" sound coming out the right side...