I bought this a month ago and threw it on my brand new kx450f looks and sounds great. Needed a USFS spark arrester and came already installed. Fitment is perfect.
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I bought this about a month ago and am extremely pleased with performance and quality. I've purchased many exhaust in the past and the build quality of the Yosh system is impressive.
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!
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.
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
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