Its been a while and i will do some looking around but i seen two kits that used professionally injected molded intake tubes and fit real well to the back of the cages. i was looking for them for someone back during the 2007 RZR air filter problems issues.

That is normal, the fan always comes on and off and the seats aways get warm and some people add extra insulation to the seat, the 2005 rangers also ran leaner then the others and that is due to the ECU that year, when I upgraded to the sportsman ecu it helped it a lot due to the richer fuel curve, one last thing if you can get the front end up around a 45 degree angle and loosen the cap sometimes the air needs to be purged out of the cooling system that is trapped in the engine.

That was really funny          .

Lets put it this way, I run 90% of the time in 2 wheel but I have 15+ more horse power and can push it harder and that helps me  a lot to stay out of 4X4 mode. UTVs are heavier then ATVs buy some 600+ lbs and if you get in the sand stuff you will need the 4 wheel drive. On steep hill climes where the power to weight ratio is in favor of a quad with two wheel drive you will need 4 wheel drive on a UTV for the same stuff. on basic ATV trails you should be OK but i always end up using the all wheel drive switch at some point on any ride because i get adventuress  .

Well for my two cents worth, two months ago the sway bar broke on my XP that has been known to be a big problem from 2005 to about the 2007 model years and have ran without it since then, it made a major improvement in the low speed articulation over rocks and big ruts but the high speed handling was effected horribly, I will be reinstalling the new updated sway bar because of this issue and will be looking into a disconnect system like titan is showing as for an upgrade, it will take some fabrication work to make the part.

Fuel pressure is o.k. and yes the pump should buzz when the key is on, not sure what you are saying about the tps sensor since there is not enough info from what you are explaneing, need more info on what the full problem is, may be a bad key switch or power box?.

The problem is you can not change stuff without needing to offset other things, it is just not that simple, the more air you move through the engine the more fuel you will need to maintain a proper air fuel ratio, the RZR runs rich at low end but at mid to top end you need more fuel and a better fuel curve to get what the pipe or exhaust needs, if you are happy with the power it has, leave it alone otherwise expect to go the full mile on any changes  :!:  :!:, there is no half way point  :idea: .