The header and silencer fit a 2016 CRF250R well. Do not use the stock spacer for the mid mounting location, or the rear spring will rub on the silencer. The combo produced a noticeable power increase. We sent the ECU out to Tokyo Mods for a new map.
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After installing the exhaust my bike sounds awesome and it gave it more power all the way through the gears. Im loving this thing. And did I mention it looks factory with carbon end cap?
Normally when installing a slip-on only minor changes to the air/fuel ratio are needed, if any at all. If your bike is currently running properly, likely you will not have to make any changes after installing this slip-on. I would recommend installing the exhaust and riding the machine to see how it is running then decide if you need an purchase an aftermarket EFI tuner .
"This comes with is a quiet core spark arrestor insert, it is one insert. If you would like just a spark arrestor and not the quiet S/A you can order it separately." -Bryce, FMF Racing
I don't currently list the separate inserts on our website but it can be ordered directly through FMF here:
The FMF part number for the Non-Quiet Core Spark Arrestor Insert that is not included with the Exhaust system is #040638