96 Polaris Xplorer 400 2 stroke tuning result and walk around by Z's Power Sports

Mukuni VM34-275, Wiseco Forged Top End, Uni 6 inch free flow intake 2 stage oiled. 200 main, 35 pilot, stock cutaway, 1.5 turns out air screw, full drop needle position. BR7ES plug, stock advance stator position.
Machine was tuned for high speed driving and low speed woodlands crawling.

[@Carguylogan]

Im looking at buying a Sport 400 L that idles great and has good power once its moving but when i nailed the gas from a stop it was weak. Kinda surged a bit abd slowly rolled away, then at like 7-8 mph it took off. Also a decent amount of oil smoke wafting out of exhaust at low speed. This is at 6000' elevation. Thinking its too rich off idle maybe? Along with worn clutch spring.

[@timothyzeimet4972]

Your correct. A extra rich condition on a 2 causes the combustion chamber temperature to plummet which doesnt allow a complete burn of the oil in the fuel. Look for worn or incorrect carb jetting and parts

[@bustersmith5569]

Well maybe he'll give it to you 😂

[@MrSprintcat]

Awesome , I have the same machine also.my dad gave it to me.man was this thing a mess.🤣😅 do you remember what needle you had in the slide? Because I bought a rebuild kit from All Balls. And the needle that came in the kit is a lot fatter than the one that was in the ATV

[@timothyzeimet4972]

So the fat needle will run the fuel transition way too lean. I can get you the needle number i used on the xplorer. I do remember it was gold in color. Going to be doing a big shop update video today on a lot of scrambler upgrades ive done recently. Very exciting stuff. Thank you for the sub.

[@MrSprintcat]

@@timothyzeimet4972 your welcome. I was at the polaris dealer today and the parts guy told me the needle that belongs on that carb is a , 6-DH29.the atv is stock otherwise.
What brand winch is that ? And the switches on the dash must be for the winch? Thanks

[@timothyzeimet4972]

Jet needle in my particular build is a 6CEY6. Slide is a 1.5.

[@timothyzeimet4972]

The switches on the hat allow me to control the reverse rpm limiter in foreward gear for extreme offroading where reduced power is sufficient. The other switch allows me to bypass the rad fan on when crawling strenuous trails continually in low gear puts a strain on the cooling system.

[@timothyzeimet4972]

The winch is a badlands 3500 zxr with a kfi industries winch mount.

[@zforce800]

Hello I have the same quad 1996 polaris explorer 400 4x4 just wondering what did you do to tune it and sounds awesome. And I'm looking for a gas gauge like yours . My exhaust is way to quit I like it loud. Thanks

[@timothyzeimet4972]

I ditched the Vm34ss carb that was on it due to wear. I purchased a mikuni vm34-275 i used the oem needle and cutaway slide and the needle clip at the very top. I used a 200 main, 30 pilot, and a br7es plug. This smoothed the transition through the circuits and made this machine very trailable even in extreme terrain. The plug is a tan color under any riding condition with the original expansion pipe

[@timothyzeimet4972]

The gas guage is made by a company called kelch. Its not 100 percent accurate but give me a good idea of where my fuel level is at.

[@zforce800]

Thanks

[@cbossplayz3555]

How many turns out do you have the idle speed screw at I have everything you have but I can’t get the idle speed right

[@timothyzeimet4972]

If you are referring to the pilot air screw i have that 1.5 turns out. The mixture on the pilot circuit plays a big role in how the engine will respond to idle speed adjustments.

[@cbossplayz3555]

@@timothyzeimet4972 dang I ended up having to go back down on my jet because it was running like crap even at 1.5 turns out