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View Full Version : 440ex with stock exhaust???



z400ex
09-17-2002, 12:33 PM
I have a 400ex with some mods , however im taken em off and sellin them to my dad(z400) I had a aftermarket exhaust but it sounds and fits the z400 .... so i figured id sell it to my dad and buy a 440 kit. I have talked to a few people about taking the stock exhaust and to modify it so the performance is better. My plan is to look stock, but have a 440 kit with the stock exhaust modded. I have heard you can drill wholes in one of the back plates, although i would like some input on what others have done. I also have other mods done but they are not visible so ther for i do look stock(except stickers). If anyone has any information about how or what they did to the stock exhaust for better performance .. id like to hear what you have to say and how it worked... thanx :D :cool: :D

Big - D Racing
09-17-2002, 02:08 PM
Take it a part and remove the spark arrestor, it flow a lot better with that out of there.

z400ex
09-17-2002, 03:11 PM
alright thanx ... ill give that try. Does anyone here prefer Je borekits over weisco or ims??? Which bore is better?