FMF Gnarly or Rev pipe?

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#1
I ride mostly tighter woods or trails so most riding is 4th gear and below. Under this scenario, seems like the gnarly would be better since I'm generally not pushing the upper RPM's anyway and more grunt in the low to medium RPM range is probably better. Any other thoughts?
 

kmccune

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#2
The new pipe designations are Gnarly Woods and Gnarly Desert you won't find a Rev pipe for a KDX anylonger. I believe that it now called the Gnarly Desert

Hope this helps, when you decide which to buy.

Kevin
 

canyncarvr

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#3
They've changed the names (to protect the guilty!) a few times, fact remains there are two FmF pipes for the kdx. The -30 is the rev (works better in the upper rpm ranges), the -35 is the torque (works better in the lower rpm ranges). Either/both will fit the 200/220.

Based on your post, I'd say you answered your own question. If you're not interested much in top-end (well, you DO have a 220, so that is self-evident! ;) ) and figure more grunt to be more better than the -35 would be the choice.

Besides, the -35 is a heckuva lot smaller than the -30.....so it's stronger, doesn't stick its glass chin out nearly as far.

BTW, the -35 takes a leaner jet-set than the -30 does.

Have fun!
 
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#4
Yup, I meant gnarly woods or dessert, not rev. Thanks for the correction. Anyway, I ordered a gnarly woods and turbine core II.
 

kmccune

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#5
Good deal,I just remember looking for the nonexsistant Rev model            myself :( and thought I'd save you some time.

Kevin
 

marksharp

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#6
I think if you add a V Force 2 reed cage and RB carb mods to the -35 pipe you can have the best of both. Tractor pulling low end, great mid range and screams pretty well on top. I'm very satisfied with the combination.
 

canyncarvr

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#7
Warning!! IMO alert!!

Any kdx'ers currently considering the rb mod to their carb should consider an airstryker from rb-designs. You'll get the benefit of a ron-finessed carb, newer keihin design, plus you'll still have the oem pwk to either sell, keep as a spare or put back on the bike when you sell it.

Besides, think of all the fun you'll have when your riding buddies are trying to figure out what all them hoses are doin' hanging out everywhere!

If you're a 'pre-' rb/dfII kinda rider, you're in for a huge surprise!

BTW, while the FmF 'rev' pipe may not exist by name, it is still the word that best defines the profile of the pipe, as does the word 'torque'.

I don't know what the word desert realistically implies.....a pipe that only works when it's hot? But then, it gets pretty freezin' dang cold in the deserts 'round here.........;)

A further btw...the dfII was the improvement that allowed me to satisfactorily use the -30 (rev profile) on my 200 in single track woodsy stuff (already had an rb-modified oem pwk). Prior to the dfII, I couldn't get an acceptable bottom-end response out of the -30. An rb-airstryker made it even better!

YeeHAw!!
 
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#8
The term desert was used to describe riding conditions that are high speed, open type riding areas and therefore high rev. The term woods was used to describe riding conditions that are lower speed and presumably lower revs. Personnally I just swap out my CS sprocket when transitioning from desert to woods. I know some here have seperate pipes for each.
FWIW: I agree with CC on the woods pipe comments he made. I have yet to dent my "woods" pipe riding where others with the "desert" pipe have. And the jetting is leaner with the woods pipe.
 

canyncarvr

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#9
Yeah...I really get the 'high speed, open type riding..' idea.

I was merely being obtuse for purposes of obscuring the obviousity of the issue.

.......thought I'd try a new tack for once........;)
 
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#11
dude the desert pipe is the way to go. a 220 has enough bottom anyway. the desert helps get a little on top. i ride tight single track with a desert pipe and it works very well. and when i come out of the woods and rip through the gears it wants to scream.
 
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#12
Slyder........EXACTLY what I heard. Hope I have same results! Got a desert pipe for my 220 from Santa!
Later
 

agitt73

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#13
unless they changed them some of the fmf pipes have a poor fit and some
tweaking is needed on my kdx 200 all i had to do was drill 1 hole a size
larger (the lower front 1)
 

canyncarvr

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#14
Most of his riding is 4th gear and below. 'More grunt... is probably better,'
he said.


..brings you to 'Dude! the desert pipe is the way to go!'?

Dude!! I see the logic of that!! ;)
 
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#15
I'm in the same boat - I can't decide between the two for my 220. I ride lots of tight woods with rocks/roots/mud, but thrown in for fun is the occasional fire road. I'm thinking that the Desert is the way to go, as my 220 has plenty of grunt down low, but seems to get "winded" pretty quickly. Somebody mentioned that upshifting was a cheap cure (after all, that's why it has 6 speeds, right?) but I think a little more on top would be ideal, especially if it didn't kill the bottom. Maybe a Woods is ideal...riding a gear taller isn't that bad of an idea. Maybe I could even go faster and fall off more!