If I slap on a K&N air filter on my scrammy (4stroker) will I have to re-jet?

I've searched the forums and found a lot of differing opinions....it seems that most say it's not an absolute thing, others say one without the other does no good and may cause performance degradation. I understand the increased air flow may call for a different jet but how will I know? Everything on the bike is bone stock......

What do I need to do or know in order to find out if I need to re-jet? From what I've read it doesn't seem that jetting is a huge mechanical undertaking and can be done by most anyone who can hold a screwdriver....

Will I notice any fuel mileage change?

Are there any jets that are better than others? Any to stay away from?

I don't want to get into any "big" mods until the warranty is out but I don't want to burn anything up either if I don't re-jet

 

When you give 'em more air, they're gonna need more fuel. Now if you have the stock jetting, and no other mods (normally jetted rich from factory, "normally", always check) you might be o.k.. But check your plug to make sure. [img]i/expressions/face-icon-small-happy.gif[/img]

 

mod quad is right here at hot seat we tell our customers the same thing 98% of the time those machines come rich from the factory i'm assuming you at sea level though also thanx jeremy hotseat performance

 

Thanks! I checked out some spark plug reading info and will do that......is there a time I ned to do this or can I go home and pull the spark plug and check it?

 

Guess I should follow this advice?......so unless I change the air box or add a pipe or something of that nature I'll be OK....but I'll still check the plug [img]i/expressions/face-icon-small-smile.gif[/img]

Replacement Air Filters for ATV - K&N Replacement Air Filters are designed to fit right into the standard OEM airbox. No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested. Customer modification of the standard airbox - removing the cover, drilling holes into the side or top will have a drastic effect on smooth carburetion. Modifications will cause the stock system to run lean and reduce horsepower. Keep your ATV stock and the new K&N Replacement Element will be good for the life of the engine. K&N Replacement Air Filters are ideal for extended use in dirty and dusty off-road riding and provide clean carburetion even at high altitude. As a rule, no jet changes are required with just a K&N filter element, however the spark plug condition should be checked for proper mixture after the first few miles of riding. If the airbox has been modified for increased air flow, the main jet size will need to be increased to provide the proper fuel mixture.

K & N

Thanks fellas!