e-series

I have a white brothers e series and i was wondering if running it without a spark arrestor would hurt anything it has K&N filter and jet kit. Does it make any differance in power. :devil :square :devil

[buckeye400ex]

I don't think it would hurt anything, but I'm not sure about the horsepower gains. It would definitely be louder. Of course, louder does not always indicate more power.

louder sure feels faster soemtimes:D

[Holty]

http://www.whitebros.com/tech2.html

QUESTION: Can I run a open end cap?

ANSWER: Yes, but you will actually lose horsepower and torque. For example, on the Yamaha YZ400F, the
E-Series loses over 2 horsepower on the dyno with the end cap & discs removed! You will also lose the
ability to adjust powerband, sound levels and jetting; as well, the system will no longer be a U.S.F.. S. approved
spark arrestor. If you choose to run an open end cap, simply remove the blank disc and bolt the end cap back on.

QUESTION: Do I have to run the E-Series Discs?

ANSWER: Yes, but only if you want maximum horsepower, maximum adjustability, and a U.S.F.. S.
approved spark arrestor.