I know there is a ton of messages to search through on the topic, but I searched a bunch and they did not quite answer my question.

Will a full exhaust make a huge difference on the performance of the quad? I mean I know that it will make a difference obviously, but will it make a night and day difference? Is it really worth it? (I have a z400 completely stock).

Also, while reading through the exhaust posts I see people have alot of problems with rejetting. Always need to be rejetted with new exhaust?? I dont want a quad that always has to be worked on and maintained. Is this what to expect when getting new exhaust? I just want to be able to turn on and ride, none of this working on the quad nonsense for me...

Thanks for your help. Reason I ask is I am interested in more speed, as I have grown very comfortable with the z (2 years). I just trail ride, but love to go fast....Thanks for the help