Yoshimura offers several options when it comes to the Yoshimura RS-4 exhaust system, with the stainless steel/aluminum version being the most affordable. We were looking to up the performance of a 2013 Honda CRF250L enduro style motorcycle without breaking the bank, so the Yoshimura RS-4 was the perfect fit.
As with all Yoshimura exhaust systems, the fit was perfect and the exhaust bolted right up with ease. Mounts are welded on toi both sides of the header pipe to maintain the stock heat guards. The Yoshimura RS-4 exhaust system comes with a sound insert installed, with a two-meter max insert in the box.
Power gains are easy to notice and equally easy to put to good use. The Yoshimura RS-4 system boosts the low-end and midrange, and allows the Honda CRF250K to rev much further up top. Because the tabs for the stock heat guards are welded on, there is no option to do without the ugly parts.
The Yoshimura RS-4 stainless/aluminum exhaust system is an affordable exhaust that boosts the stock power output of the 2013 / 2014 Honda CRF250L throughout the powerband, and it adds some much-needed top-end overrev...