I just put on a white brothers pipe and added a K & N filter with air box vents to my warrior, The dealer said it was not required to jet the carb. Should I rejet the carb and if so what size main should I use. I'm at about the 3000 foot elevation . I do notice a lot more power now. What else can I do to increase power with out going into any major engine work.

 

Well, I sure wouldn't take any stock market tips from your dealer! Whenever you increase the air flow by adding better exhaust systems, you cause a lean fuel mix to occur. You compound this by adding a better filter and further yet by opening up the airbox. You need to run a test & plug read right away to see just how lean you are. Your stock main is a 145. I would guess that you'll need to go to at least a 150 main jet to supply the correct fuel to the mix.
As I tell any one who will listen, only YOUR engine can tell you what it needs in the way of fuel.Install a new plug, do a test ride at 3/4 to full throttle. Stop & pull the plug to check for color. grey or white is way lean. Tan or brown is correct jetting, black or dark is rich. It is unlikely that the latter two will be there.
I would definitely do this before any extensive hard riding.If you need more info on jetting or plug reading, I have written an article and a photo which I can email.

 

Hot Shoe
Thanks for the info. Can you e-mail me that info, My e-mail address is in my profile.

 

I'd say there's 99.9% chance you'll have to re-jet. The only way you wouldn't is if your altitude falls into play. In that case, it would have been running rich since you got it.
Pull the plug, it'll tell you. Most likely you will have to go up a size or two.

 

Thanks Cal
I got both e-mails. That helps out alot