I always laughed at the kids in high school who didn't understand engine symbiotics -they'd swap the stock cam in their mustang or camaro because they liked the rough idle sound through the cherry-bomb glass pack exhaust- but then they couldn't figure out why their car wouldn't idle and would stall at every red light-
then they'd crank the idle screw in on their 4 bbl holley 750 cfm carb to raise the idle up to 900 - 1000 rpm to keep the car from stalling at a red light (caused by a bad-*** cam lift & duration) but then they'd be mystified why their car kept moving forward at a red light despite "two-footing" the brake pedal and then when a gear head would tell'em they also had to replace the stall converter in their tranny to a "high-stall converter" to compensate for the high idle- they'd have a blank stare on their face

my point is- research research and more research before upgrading internal components of your engine

 

The 500 is much more simpler then that.
I remember before the Sportsman 500H.O came out that people would put the 500 Scrambler cam in the Sportsmans and make there own H.O.
They did no clutching or rejetting,the cam just caused the rpm to increase from mid to top end and that was that.
The Scrambler always was a 500H.O well before the Sportsman.

Anyways, there was no trick to it ,just swap in the High Duration Cam and it woke any fuji motor right up.425,455 or 500.
Even the new 400 Sportsman (455) has the H.O cam but retained the smaller 34mm carb and they work together.

I dont, even think that Polaris even makes the low duration cam anylonger. If a Fugi single needs a new cam there getting the Scrambler Cam like it or not now.

 

Here is a post where the guy tried everything and it was the rear clutch buttons. http://forums.atvconnection.com/pola...sportsman.html

$10 job. Worth a peek.

 

i already replaced all the clutch buttons, my dad and me and the dealer went through the clutch it can't be that.

 

splorers quad sounds exactly like mine. mine won't spin tires and goes about 40mph. should i try adjusting the e-clip on the slide needle too?

 

Sounds like you have nothing to lose if you try.

 

well-

except for that one guy who put his e-clip on backwards and caused this

 

But at that point, he could look at it and tell what the problem was.

 

and... why plow it when you can melt it

 

sorry OP- didn't mean to hijack your thread