full exhaust or slip on? slip ons dont do a whole lot for sport quads, atleast the 450's. the head pipes are normally smallish from factory. but air lid on or off? tuned? idk maybe 10hp? if that.

i still have my 06 trx450ER converted to kick.

small afterparts

DASA full exhaust
hotcam stage 2
HRC jet kit
green wire mod
Elka LT suspension
Uni air filter with open lid
Pro taper bars
other small stuff.

Use to ride a lot back in 2006-2008. I'll post pics in the morning

This post was edited by immunity on Apr 15 2014 05:34am

Well how much more horsepower do you get with a lid? What other parts can make it get more horsepower

He is talking about your airbox lid, you gain with it off.

I thought I would get way more horsepower.

Your biggest gains will be with your riding ability. Practice, practice, practice.

With an exhaust and an air filter??

Lol.

5-8hp maybe from intake exhaust tune with most coming from the tune

IIRC I dynoed at 58hp with the 505cc setup
Stock 450rs(quads) make around 35hp
Stock 700xx should be 47-50hp or so but with much more torque than the smaller cc bikes
You wont need to rev to 12,000rpm+ to make 50hp either

The stock horse power on my quad is 63 HP as it says online.

88s fastest speed as well

63hp could be crank rated number i was talking more about wheel horsepower
Here is a dyno chart. Most are saying 40-44hp stock this dyno could be a little on the lower side
Tune exhaust and airbox lid off yields 8hp~ gain which quite a bit.
40-44whp is one of the highest factory bikes around


http://www.ehsracing.com/products/trx700xx_ehsracing_barker_combo.htm