I have a 87 250R ported for mid range wiesco piston with mod,pyrmid reeds, new cdi, cool head with 18cc dome, and using a fmf fatty.I hate this pipe. it sucks ***. I want a good mid rang pipe but dont want to pay through the nose. it's for my girlfriends bike. FMF sucks. I HATE FMF.

 

You get what you pay for!
I have tried almost all pipes on the market and like (and use) ESR TRX5 the best.
Great power throughout the entire RPM range and they have a 30 day money back guarenteeeeeeee!

Try it, you will like it!

 

There's nothing wrong with the FMF Fatty on your 250R, that pipe is designed for midrange. Most likely your machine is not jetted correctly for the combination you have. Take the time to jet it right instead of buying another pipe.

 

Like mike 330 said go with the esr trx5 you will not be disappointed! As for the FMF on the trx...well you said it all.

 

my bike is jetted perfect, thats not the problem. fmf pipes are desined for stock bikes not race bikes.I can tell a huge difference in power between my old ct pipe tats 10 tears old and a new fatty piece of crap.

 

I totally agree, check out my pics I have the ATC5 pipe. It is great. Esecentially the same pipe as the TRX5.