ive whould not run it without the controler. ive herd of a couple of people messing their engines up. you should look for a used dobeck controler, you can find them sometimes for like 100.

like this one
http://phoenix.craigslist.org/mcy/581744154.html

i dont know where you live but if you look you can find deals like this alot of places. and some people are willing to ship.

 

now I dont know who to believed

And plus those programmers are one hell of a hassles to program!

 

Like I said before the computer adjusts for air density and altitude. Even if you pull the spark arrestor out of the stock exhaust it will run leaner. At the end of the day its your bike. Ask this same question here. www.raptorforum.com

 

Is it a actual programmer like one for a truck. all of the ones i have seen are more like a chip that you just plug into the cpu. The whole point of efi is to compensate for air fuel otherwise you would have to reprogram for different altitudes, like jetting for a carburuetor

 

How does a car measure air/fuel?????????????? with an o2 sensor!!!!!!!!!!!!!! the raptor does not have one.

 

well how does the efi componsate for altitude????????????

 

another thing to rememeber that this raptor run lean out of the factory to pass emissions.

 

it has a pressure sensor

 

Dont worry about the EFI for the slip on system the newer raptors are fuel injected

 

I plain english I purchased a expensive piece of junk then!