Im interested in the "Fatboy 4" exhaust setup. Read up on it and it says up to 9hp gain and a gain of 21 bike lengths in a 300yard acceleration. Let me know if anyone has heard one or let me know what you think is the best pipe and why for the YZF! Thanks

 

You do mean YFZ dont u? if not..umm wait for some dirtbikers to come along....but if im reading that correctly 21 bike lengths gain in 300yrd.....umm alright

 

A guy I raced with this season put a ct on his yfz. It claims a 10 hp increase over peak. Really nice pipe and he was beating other yfz's with yoshi, fmf, and gtyr pipes. all the bikes had K&n no lid and cam mod setups. I havent seen any duncans out there, but i hear they have a respectable 4 stroke reputation.

 

I did mean YFZ...sorry about that. The March issue of "dirtwheels" has the article on the "Fatboy 4" pipe...thats where I seen it..also on this website it states it also ( http://www.duncanracing.com/newprodu...x.phtml?id=288 ). What can I say? You know more about it than they do, or are they lying?

 

thanks maddog for the reply. By the way, your Raptor looks like it gets up and hauls a$$..NICE bike!

 

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