I would highly recommend this exhaust to anyone wanting to get more solid power, better looking, and the sound! Is amazing! I recently compared the FMF 4.1 with my 2012 Rmz250 and the Yoshimura RS-4 and in my opinion for the many years I've raced I would recommend Yoshimura any day over an FMF. Pro circuit and Yoshimura I've both experienced with 2 stroke and 4 stroke bikes and both brands NEVER disappoint! As always love the support and great service of Motorsport.com wouldn't order from anyone else!
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Cant go wrong with Yosh. Best exhaust for hondas 4 stroke moto bikes.
I love this product it sounds better and performs great! I put this on my YZ250F. I recommend this it's great!
Very happy with my purchase from Motor Sport's.
Fits perfect for a 2015 WR450F, easy installation. Great sound and outstanding power. Very responsive, I could keep my front light when needed to on the trails. The exhaust came with a cool Yoshimura plug and some stickers :)
Intermediate vet, rmz250 2015, did one heat with stock, then replaced it with yoshi and did another heat; no gains in time. Had to use a leaner coupler with yoshi, with the stock one was slow.
My impression is the besides the badass look and sound there is very little difference compared to stock; I felt imrovment in hi revv but less low-mid range.
Very easy to set and to remove; I put the stock back and I have the yoshi for sale now.
fit great on my 2012 crf 250 sounds great Bike revs faster the head pipe is the same as stock with out the heat shield so save some money and get the slip on system
this full exhaust system is da stuff!!! quick & easy to put on! sounds very nice! and omgosh power everywhere now! comin out of a turn and pinn the throttle your front tire will be lifting up!!! GREAT PIPE!!
power increase and even touchier throttle response from top to bottom, my RMZ250 now sounds more like a 450, revs longer in 5th and brings front wheel up in higher gears when needed, very tight fit under side panels but no problem, first after market pipe that I have ever bought that actually gives noticeable power increase with installation, awesome pipe, awesome results
Awesome Exhaust for New CRF450R ! The sound is better and not as loud as stock minus a few decibels.The power is better and looks sick on bike.
OEM: 96.0 dBA 99.1 dBA
Yoshi w/ AMA sound insert: 95.8 dBA – dBA - Installed
Yoshi w/ Spark Arrester: 95.8 dBA 98.1 dBA - Optional