exhaust??

CANESTIME777

CANESTIME777

Looking at upgrading my exhaust. FMF is what everyone knows....but are there others and I am wondering which ones get the respect of my DBA friends ??
03 YZ450
 
snowflake

snowflake

Pro Circut, Dr. D, Yoshimura, GYTR (yamaha's in house brand) are all good buys, I've had 2 seperate FMF systems on 2 different bikes, didn't feel like either of them offered anything. One bike was a WR250F that I went to a YZ-F Stock system and I felt like it did better than the FMF. The other on was my CRF250R, I went to a pro circut I picked up for $100 and again, its night and day difference from the FMF
 
O

ossagp

Not that a 450 needs anything else, But especially for the early yz's Dr D had the best fit and power delivery for me. You didn't ask, but if your Bike was mine I would be turning it into a 5 speed with that kind if money. From a wr, actually.
 
CANESTIME777

CANESTIME777

ossagp:
Not that a 450 needs anything else, But especially for the early yz's Dr D had the best fit and power delivery for me. You didn't ask, but if your Bike was mine I would be turning it into a 5 speed with that kind if money. From a wr, actually.
Click to expand...
I've thought about that 5th gear since riding it. I desert ride, so sometimes I am wanting that extra gear. I wouldn't even think about trying to do it though....How much do you think that would cost ?
 
CDA

CDA

Don't know if I would split the cases and add a 5th gear unless you are planning on holding that bike wide open for miles on end. Back in that year Ty Davis was winning national Hare and Hound events on a 4 speed trans on the YZ450. He did mention that 5th would be helpful, but if you gear the bike properly for your riding, you should be OK. As far as a pipe combo, I had an 07 YZ450f and I only added a FMF muffler and ran the stock header. The FMF muffler gave me an increase in off the bottom bark as well as allowed me to run a Sparky screen to be legal in the So Cal dez.
 
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