Category Archives: ATV Performance Modifications

Clutch Spring Rates for 2013 850XP

Is there a chart on here that shows spring rates for Primary and Secondary Clutch Springs from EPI, QSC, Dalton, ect…? Mudinmyblood has great charts for helping to tailor tune clutching for Kawasaki’s and it was a huge help in setting up my Brute Force and my Prairie. I want to clutch my Polaris but all everyone says is "buy this kit" or "that kit." Does a 2013 850 XP require weight changes? Can a guy just buy a spring kit? Why the heck don’t any of these "Kits" have a contents to them? They just say tire size and price. I bought a kit from EPI for my Brute Force based on tire size and it was a pile of crap for what I wanted it to actually do. After playing and researching I found that all I had needed was springs and my Kawis are now awesome.

2014 sportsman 800

Hey everyone, new on her and have evening having HP issues with my new bike…seems extremely sluggish and seems to have a lack of power…any suggestions?? Running 27" tires and upgraded to a k and n filter…other than that still stock

Sportsman 850 looney tuned exhaust

I’m wondering who has experience putting on a looney tuned slip-on exhaust on their sportsman 850? I have a 2015 850 and bought a big gun exhaust and it didn’t fit for nothing. I’m curious if I’m going to run into the same issue with a looney tuned or if it will fit perfectly? Thanks!

My modification thread- 400HO/500HO

Okay, so last summer I set off to do some extensive work on my ATVs. I decided I needed to improve them more to my liking… Well, this ended up being extremely time consuming. I’m done with my 500; it took all last summer. I’m presently working on my 400. Hopefully I can get it finished up in a couple weeks.

Since I failed to take many photos of the process on the 500HO, I’ll be taking them as I work on completing the 400HO. Hopefully some of the things I’m going to post here will be helpful for others. I can always do my best to answer questions and give guidance. I must give Hatzie a lot of credit here. He helped me out a great deal on the work-light/reverse light mod. There is a decent chance I could have figured it out on my own, but it would have taken so incredibly long that I wouldn’t have figured it worth my time. The work alone is time consuming enough.

Here’s my long list of modifications:
-Larger Battery and battery tray
-Bus Bars for +/-
-New battery cables
-Auxillery fuse block
-Battery charge port in fender
-Work/reverse light on three position switch: Reverse/off/on
-Light bar rewire
-LED tail light bulbs
-Cooling fan over-ride for shut-off and turn on: Over-ride on/normal/over-ride off
-Reverse RPM over-ride lock-out
-Convert Yellow over-ride button to a horn button
-Horns
-New Winches (viper Max 3500)
-Wired winch control port in Fender
-Refinish crappy powder coating on Polaris bumpers
-Fix stripped out self-tapping screw holes

Future additions are going to include:
-Rear mounted power plug for expedient jump/slave cable hook-up
-Coolant temp gauge
-Handle bar mounted mini flood lights
-Polaris LED headlights
-Onboard air compressor
-Heated grips, throttle and seat

Whats a good slip on exhaust and clutch kit combo

I am looking to get more low end and mid range out of my 07 800 sportsman. I have looked at several slip on exhaust and clutch kit combos. Just wanted to see if anybody on here had a good gain from that kind of setup. My quad is completly stock at the moment but it really doesn’t have a lot of low end torque. I’d like to pull more off the line and in the mid range. I ride a lot of windy trails. I was hoping to do this without a fuel controller.

Whats a good slip on exhaust and clutch kit combo

I am looking to get more low end and mid range out of my 07 800 sportsman. I have looked at several slip on exhaust and clutch kit combos. Just wanted to see if anybody on here had a good gain from that kind of setup. My quad is completly stock at the moment but it really doesn’t have a lot of low end torque. I’d like to pull more off the line and in the mid range. I ride a lot of windy trails. I was hoping to do this without a fuel controller.