How to tell if pipe is FMF torque or rev

[jc7622]

I got a chane to try out my FMF pipe (bought on Ebay) this weekend (or at least the best I could putting around with my 6 and 8 year olds). I can tell it is jetted too rich, but it was still an improvement. Surprisingly the biggest improvement seemed to be the in higher revs. It got me to wondering if it was actually a rev pipe. It is supposed to be a woods/torque pipe but you never know. Is there a stamp on it somewhere or some measurement I can do to determine which one I actually have?

[jeopardy98]

I found out this weekend when I cleaned mine up that I actually have the FMF fatty pipe so I won't be much help.

[strider80]

IIRC, I think someone (CC?) posted that a rev(Desert) pipe measures about 14" circumference around the thickest part, and the woods pipe measures 11". Hopefully someone will correct me if I am wrong.

[2001kdx]

That's right strider, a very simple way of figuring it out.

The monuting tab should have a "-35" or "-30" on it somewhere, the -30 is the rev, the -35 being the woods.

[Indawoods]

Not on mine...

[jeopardy98]

Does the fatty pipe benefit the bike any or should I sell it off and buy a woods pipe? /threadjack

[Ogre]

I believe the number on the mounting tabs are:

020056 - Desert pipe

020057 - Woods pipe

My woods pipe has 200057 on the tab
But hey I'm a KDX noob so I may be wrong.

[canyncarvr]

Re: 'I believe the number on the mounting tabs are:

..whatever they are.

The numbers on the tab change..they are sometimes incorrect..as are sometimes the descriptions, pictures and part numbers in catalogs.

..which is why measuring as noted above will tell you what you need to know without any confusion from someone else's error.

Re: 'Hopefully someone will correct me if I am wrong.'

I would..but you're not!

The Fatty pipe was touted as being an 'all 'round' pipe that works best everywhere. No reason to get rid of it if it suits you. They were 19ga, not 18ga. That might be reason enough!

There isn't a Fatty made for the 'H' series KDX..although I've seen Fatty's ON 'H' KDXs. I don't know how that worked..I saw it only for a minute.

[jc7622]

Mine measures to be just over 14" circumfrence at the widest point. It looks like I wound up with a rev pipe. It's just like Forrest said - life is just like a box of chocolates.

I knew that thing had some serious top end ooomph - a lot more than the descriptions on here led me to believe I was gonna get. The bottom end still seemed as good or better than before and that's with the jetting probably being a little off.

[canyncarvr]

Curious...do you have the auction #? Curious to see what it said.

This was on a 200 or a 220? If I knew...I fergot.

So...you like your chalk-o-lots?

[jeopardy98]

I'm guessing you are referring to the thickness of the steel and therefore meaning it is a bit heavier then the torque or rev? I guess I'll just leave it for now. I was going to mod the airbox and put in some boyeson power reeds and then follow Fredette's suggested jetting as a starting point so hopefully the fatty won't make enough of a difference that I need a diff. pilot or main but if so they are cheap enough.

[jc7622]

http://cgi.ebay.com/ebaymotors/ws/eBayI ... N.m313.lVI

I sent a message and asked him and he said it was the woods pipe. He probably didn't know the difference. Oh well, a lot of my riding areas could handle a little more top end and it appears to have not lost any low end - actually there is probably a little extra there also.

Maybe now it'll have enough cojones to spank all my riding buddies on their CRF250s.

[canyncarvr]

Xs or Rs?

Not that size matters. Well, it does of course, but.....nevermind.

The old 'It's the rider!' thing. I rode for years with a guy (Marty) that could outride me on whatever was at hand...including my own bike! He rode a CRF250X for awhile. Loved those Showas!

Hey!! The eBayer won his first HS with it...it's GOT to be good chocolate!!! Him saying 'The Gnarly series is designed to enhance low-end performance...' was a sure-fire clue that he had no.

Clue that is.

The word 'Gnarly' has nothing to do with where in the power band the pipe works best.


It DOES have to do with..........

Re: 'I'm guessing you are referring to the thickness of the steel and therefore meaning it is a bit heavier then the torque or rev?

Yes. Gage is a measure of metal thickness, and that is what I meant by 18ga and 19ga.

BUT, as true with any metal thickness, the lower the number the thicker it is..18ga is thicker than 19ga. Hence the term 'Gnarly'.

They (FmF) started out calling it 'Burly'..but they got into a trademark scuffle with the use of that name, so changed their thicker metal pipes to Gnarly.

Wallah!!

[scheckaet]

Wallah!!

you proly meant: voila!

[canyncarvr]

I don't think so............

I know I din't mean violin, neither!!

That's s'posed to be a joke, too! I amuse myself a lot.


Besides, according to the web (which we know is ALWAYS correct):

Definitions of Voila on the Web:

Voila is the seventh proper solo album by Belinda Carlisle, released in February 2007. It is described as "an album of classic French Chansons ...
en.wikipedia.org/wiki/Voila (album).


And whatever I DID mean...it weren't THAT!



According to Princeton, I COULD have written:

'KDX wallah'

??

Noun
S: (n) wallah (usually in combination: person in charge of or employed at a particular thing) "a kitchen wallah"; "the book wallah"


I'm done now............

[2001kdx]

Re: 'I believe the number on the mounting tabs are:

..whatever they are.

The numbers on the tab change..they are sometimes incorrect..as are sometimes the descriptions, pictures and part numbers in catalogs.

..which is why measuring as noted above will tell you what you need to know without any confusion from someone else's error.

Re: 'Hopefully someone will correct me if I am wrong.'

I would..but you're not!

The Fatty pipe was touted as being an 'all 'round' pipe that works best everywhere. No reason to get rid of it if it suits you. They were 19ga, not 18ga. That might be reason enough!

There isn't a Fatty made for the 'H' series KDX..although I've seen Fatty's ON 'H' KDXs. I don't know how that worked..I saw it only for a minute.

When the H series was released, the Gnarly was no where to be found. Instead, they had Fatty pipes with the -30 and -35 designations.

These were entirely different than the E series fatty pipes, which were touted as all-around performance boosters.

[2001kdx]

I'm done now............

Yeesh, I thought you'd never stop!

[canyncarvr]

When the H series was released, the Gnarly was no where to be found. Instead, they had Fatty pipes with the -30 and -35 designations

90% of what I've read referencing Fatty FmF pipes is bogus..as is most of what I've read about other names of FmF pipes.

What's the source of your statement? I'd like to read it.

Thanks.

[2001kdx]

There have been plenty of instances over on Canadian Daves (DRN is only referenced because of the sheer amount of posters) where people have had the FmF Faty pipe come on their "H" series, some with a -35 on the tab, some with a -30 (As mine had).

Other than that, I cannot justify my statement any further.

'Sall good though

[canyncarvr]

That's got 'bogus' written all over it.

I've seen countless references to 'H' series bikes with an FmF Fatty..and it's no such thing.

It's akin to posters saying they have a 'Gnarly' profile pipe..and that term means nothing in regard to which profile they DO have.