one more time. when i let off and it pops or backfires slightly, what does that mean? (lean?/rich?) i tried a search but couldn't find anything concrete. it's not a BANG!!! just slight popping during decceleration. thanks in advance.

 

it could be your valves.

 

Richie, Turn you mixture screws 1/4 turn counter clockwise (out). If that doesnt help give it one more 1/4 of a turn. DynoJet says that the max you should have to due this is 1/2 of a turn on the screw. Oh, and by that way. 50 Percent of us here have or have had the same problem.

 

I had that exact same problem on my wolverine. Slowing down at righ rpms it would pop till I got stopped, I screwed out my mixture screws seemed to help a little bit, but wasnt right. I found out the exhaust was leaking arond the head, so small of a leak I couldnt even feel it. I got some high temp sealant retightend all the bolts, it works now, no backfire. Hope this helps.

 

i wish i could show you guys the way i have my air screw set up. i've got a piece of wire soldierd onto the screw so all i have to do is turn that. it's pretty cool.

 

Have you checked the carb boot(s) for a leak?

 

Check all connections for a vacume leak. If no leaks then richen up the mixture screws slightly.
What pilot jet are you running?
The trouble shooting guide states
"Dynojet kits are designed to use your stock pilot jets. THIS IS A MUST!"

 

today i was finally able to get my quad out to my mom's and ride. IT WAS HORRIBLE. this is what it was doing.....when i would accelerate real hard it would almost shut off. i don't mean like i explained earlier. this was any gear.
when i would peg the throttle it would sputter so hard i could tell it was eventually going to die. the engine would not even try to catch up to itself.
keep in mind the jetting is 160/165 and a big hole in the lid and one in the rear with no snorkle. well i rejetted to 165/170 and tried it. same. i tried to go up a steep hill and went dead. i had to charge the hill to make it.
!!!then i removed the lid it almost completely went away!!!
so what i guess i'm saying is the jetting, even with the modded lid, was way too rich. i think the floats still need checking. to be honest, i really don't see how the floats adjust.
no leaks. stock pilots.

 

one more thing. when i added the pipe i jetted according to the yoshi suggestion (150/155) but with no holes like it called for. and ran that for a while. well when i had my new piston and cam installed i looked at the stock piston and it had a black burned looking spot on top. WHAT WAS THAT? is it normal?

 

The poping is normally called a "Lean Backfire". Turning the screws out will richen your mixture eliminating the backfire.

Jetting can be a Royal Pain in the prostate!! I am currently looking to purchase a meter that I can use to properly check my air fuel misture.