Hello Forum! I just have a quick question regarding some FMF pipes. I have a 2003 CR125 and I want to get a new expansion chamber (current one is stock) I also have an FMF Turbine-Core 2. I am stuck between the Fatty "motto" and the SST. I do mostly trail and track riding but I still can't decide. I want some better mid and over rev from the SST but I'm not sure if that is better then the overall power gain from the Regular Fatty. Anyways, what do you guys think would be better the SST or the classic fatty?


Pro circuit..
i would but i already have an fmf silencer and feel like i should match it with the header

I'd keep the stocker and your mid power.

If FMF then I would go with the SST or Gnarly.

I'd go with the fatty. Great for the trail and the track!

I feel like my pro circuit just added more power everywhere, especially down low.

sst is crap, talk to 2 stroke engine gurus, or even google it, dont waste your time with the sst.

fatty, or pc.

If FMF then I would go with the SST or Gnarly.

Gnarly is not made for the 125.

Gnarly is not made for the 125.

Hmmm, did not know that.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By Tyler Hansen
      Not entirely sure what's happening here. My exhaust seems to be leaving permanent gold residue on rear fender. Is this normal burning or is my exhaust trying to tell me something more? New to this bike and trying to navigate myself around it. Any advice would be appreciated.

    • By Loper135
      So I am going to buy a brand new ktm 150sx. Should I wait until the 2019 come out? When does the 2019’s come out? It is March 22, 2018 right now. I have the cash already,but want to make the right decision. Thank you.
    • By MotoXRacer_19
      Does anyone know how to, or if you can, change your AMA number? The race number, not the full thing. 
    • By MrPickles
      I have a 1990 Suzuki RMX250 for sale.  It was bought from a friend who bent the crank back in 2000 and took it completely apart (down to the nuts, bolts, and washers).  The frame was powder coated black.  New crank case bearings, new gaskets for crank case, cylinder, and cylinder head.  All transmission bearings were cleaned and checked for wear or damage.  The crank was rebuilt and balanced by a local Harley shop.  New OEM piston and rings.  Cylinder and head are in excellent condition and worth almost as much as the entire bike, I think.  Brand new FMF Gold Fatty pipe.  New front and rear Renthal sprockets and new D.I.D. chain.  New grips.  Includes the original headlight and odometer (not shown), Mikuni TM38 carb has been cleaned and rebuilt.  Seat is original and in perfect condition. Runs perfectly.  Could use some new plastics, new foot pegs, front fork seals, rear tire, and a tune by someone better than I.  Pink slip in hand, but hasn't been registered in years.  Will throw in a Clymer manual.  The bike is a rocket and too tall for my 5'9" frame.  I'd like something a little more convenient to ride with my young kids. Asking $1800 OBO.  Serious inquiries only please.  Price doesn't include any shipping.   
    • By faizakhtar125
      Hey guys I just bought a bike last night. So the seller said the bike will turn on but then die. We didn't try it because it was really late at night and it was raining (seat was wet). But he said if you bump start it, it will turn on and ride. So what do you think the problem is? I just want to make sure it runs... I probably won't be able to bump start it till Saturday (rain)... It's a four stroke, and I know absolutely nothing about them. Thanks.