I have added a k&N filter and taken out my spark arrestor and the litte plate on the bottom on the muffler off this opened up flow a little but I haven't rejetted should I. Thanks for any advice.

 

When installing a KN filter you must rejet. The bike with the stock jet will not be set for more air and your bike will run lean.

 

I just finished a post on a similar topic on this forum. Any time you increase air flow either intake or exhaust, you change the air/fuel mix, meaning that increased air requires increased fuel to compensate. Also, 4 strokes require a prescribed amount of back pressure to operate the valves efficiently. I'm not familiar with the silencer on your ride so I can't say whether removing that plate will affect this or not.
By "blowing up with a K&N," if you mean seizing, if the filter, any filter, causes the engine to run very lean, yes, in worst cases.
Bottom line, there are just two things that determine whether you're running lean...yourself by doing a test ride/plug read, and the other thing that can tell you is the bike when it seizes or burns a valve. Hopefully you will know it before the bike

 

Just clean are oil the filter and your fine. Check the plug, if it is white you will need to re-jet by raising the needle and grab a bigger main.

 

run its gona BLOW!!!!!!!!!!!
sorry. could'nt help my self

 

get a pipe then rejet
dont take the hassle, jet now, then jet later again
get a pipe asap

 

Well, i ordered a K&N last week, and it was so explosive when i opened the box it blew up in my face... i can only imagine what it would do to a quad.... just do what i do, run no air filter at all, the sand mixes with the gas and air to make the engine react almost as if it was turbo charged... its a killer combination.

 

it'll be right providing you don't pull the pin out!!!!

sorry.....just my weird sense of humour

 

Dirt injection system. i have heard of that, Yamaha used that in the mid 80's. They will use it in the rapter also

 

thats good
took me a min...but pretty good.