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FMF Factory 4

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Anyone tried the FMF Factory 4 exhaust kit, any good?

Is it loud compared to the orginal? Looking for more power in mid and high rpm.

I went from a YZ250 to a YZ250F and i miss some of the power..

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I've got it on my 250F. It really adds alot of over rev to the bike. Not so much on the bottom but I am a revver not a lugger so it works for me.

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I have the Ti4 on my 450, and I like it. But for a 250F, everything I see says the Dr.D system is the way to go. Everyone who has one loves it, and at $400, it's not a bad buy.

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yes, looks like dr.d is VERY popular! I guess i'll order it.

Will the bike be any lighter with the dr.d ? the titanium sets saves some weight

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I have the factory 4 on my 04 250f and it does make a lot more power than stock. Mostly in the mid. And the overrev is incrediable. The exhaust did the trick for me. My brother has the DR. D on his 450 and it didnt really do much for the bike but that was the 450 the 250f could be different. Hope this helps.

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Its all about the powerbomb header and the Dr D doesnt have that.

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I also have the fmf and highly recomend it.It may be more expensive than the DR.D but it's worth it.Also If you like your boots plan on buying a heat sheild of some type because the powerbomb likes to eat boots.

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