Will i notice a difference after rejet?

[lyrikz74]

I have a fairly new 2008 400ex. I put a sprocket, sparks key, exhaust, and new filter and removed air box lid. THe bike feels like a different bike. Im pretty sure i should rejet. It runs great, no issues.

WHat i want to know, will i notice a power gain if i rejet the bike???? Being it runs great now, i dont want to hurt anything so i plan on rejetting to keep it in the right AF mix. Thoughts?

[Honda#4]

It's beneficial to rejet, anytime you add a filter and exhaust your letting more air in and making it exit faster which will make the motor breathe much better thus produce more power or in throttle response but usually both.