Bonneville America Forums Forums Technical Forums Performance Mods poping

want to do something with that but no idea what!!!!!!! poping when I'm slowing down and closing throttle
epco
AI gone
125
pilot stock
no snorkels
thruxton needles 1 shim
NO IDEA??!!!

first try to richen up your mix with the screws...when that doesn't work change your pilots to 45's

hmmmmmmmmm even have 45's in cupboard and what about 130 mains? have them as well (two sets if someone wants one!!!!!!!!)

I had a very similar problem. I turned the mixture screws 1/2 turn more (out) and poof... Poping gone. It went on the dyno at dealer and no problem. No need to rejet.

will try to do something this weekend anyway have job with changing front disc then carb job is a bit easier !!!!!!

I have mine at 4 turns out and still get popping. How far can you turn them out?

If you have to turn 'em out more than 4 turns then 1 size up on the pilots is probably required...Grzegorz, have you tried turning the pilot air screws out 3 to 3 1/2 turns? If so, then you probably need the 45 pilot jets.

Regards

Janek

tried 3 tried 3 1/2 and still popping mayby will try 45 pilot tomorrow or something else

ok 4 turns and poping gone!!!!!!!!!!!!!!!!!

Thank Jan for advice!!!!!!!!!!!!!!

my full set up now;

125 mains
stock pilot
thruxton needles with one shim
stock air filter
no snorkels
AI gone long ago
EPCO's
air screw 4 turns out (tried 3 or 3 1/2)
drilled slides

Hey i to have the annoying poping sound. I am looking to adjust the mixing screws. Thats my problem where the heck are they. I must be dumb because i can't find them. I just want to give it a try before having triumph do it. I did see a black nob on the bottom of the left carb. Please if you can help this newbie drop me a line. Thanks Doug

I could use the 130s if you still have them

what year is your america

There is a screw at the bottom front of each carb. You have to remove the "plug" that covers them. A small screw threaded into them and pull with a pair of pliers. There is a thread on this web site, just search in archived forums. It's pretty easy, you'll be surprised how much more responsive your bike is.

I hate to labor this thread, but I did finally get the d-tool. Well i turned both to the left to open 1/2 turn. I found the bike a little more responsive. I did not hear to much popping between gears. But let me ask do you all hear popping when you down shift. I do and i don't think you can do much with this. Thanks for the advise, Doug

Doug a little popping is normal for this type of carb setup because when you decellyou are off the gas yet the suction from engine RPM causes the slide to open...causing a lean condition...if your getting excessive poping then youmay want to turn the screws out a bit more or (if needed) change your pilot jets to 45's

You also might want to run both screws in, counting turns, to see if they are both the SAME, then back them back out the same and re-adjust from there. Are both pipes bluing the same?

Hey Ben, I don't mean to jump in, but your response has me thinking.
My left side is showing a little more blue than the right. just inside the "crease" at the top. Everything seems to sound ok. I do get an occassional puff under my butt, it' happens on rev for downshift if i really snatch it quickly.

Just to re-cap my setup.
06 TBA
Snorkels gone
AI's gone at 300
Modified stock Exhaust
2 3/4 turns out
stock jets etc.

thanx

Double check the screw settings are the same for both. All the way in, then back out 2.5 each. Then I'd say ballance the carbs! I remember someone saying the couldn't believe how often they do that... And it's a good idea to do it every time you fiddle with something. A liiiiitle difference in blue between the pipes is ok. Also, after adjusting it will be hard to tell what is new blue and what is leftover... Unless you polish the bajezus out of them.

Excellent. Thank you sir.
The blue is very minimal. But hey this sounds like a good opportunity to tell the wife I need a carb balancer from Bret.
Thanx buddeeeeee!

Sneak a few other items on the order while you're at it

I did the airbox mod and rejetted to 132 per the calculator. I'm at 2 3/4 turns. Very small poping on decel, but I like that. Very good response everywhere in the throttle position. My only problem is when I blip the throttle (flip it real quick:if that's what bliping is:) I get a ..Hmmm how do I say this? A dead spot. It kind of dies then grabs. Like chokes? Almost a backfire at the carb. I hope I make sense. If so, whats going on and how do I fix it?

This is at idle When I "blip".

I am gonna move this question to another thread. Seems more appropriate. Poping is not my problem. New Thread will be "Bliping" (hesitation while doing this). Moderators, if I have the wrong definition of Bliping delete my stuff so I don't go screwing others up. thanx