This is a Keihin OEM replacement fuel injector part # 79041023044 that has been modified to flow 690cc/min or 50% more than a stock injector. It is a great way to supply built motors with the fuel they need. It also works with E85 and methanol.

It fits various KTM, GAS GAS, and Husqvarna 250, 350, 450, and 501 engines. (this injector is used on all 250, 350, 450, and 501 dirt bikes from 2015 to 2022) Below is a chart of all years it works with, but before purchasing please verify this is the correct part number for your bike.  

If you want an even bigger we also offer injectors that flow 83% more (825cc/min), along with direct OEM replacement injectors as well.

KTM

2015-2022 250 SX-F

2016-2022 250 XC-F

2016-2022 350 SX-F

2016-2022 350 XC-F

2015-2022 450 SX-F

2016-2022 450 XC-F

2017 450 EXC-F Six Days

2017-2022 500 EXC-F

Husqvarna

FC 250 2016-2022

FC 350 2016-2022

FC 450 2016-2022

FE 350 2017-2022

FE 450 2017-2022

FE 501 2017-2022

FS 450 2017-2022

FX 350 2017-2022

FX 450 2017-2022

GAS GAS

EX 250 F

EX 350 F

EX 450 F

MC 250 F

MC 350 F

MC 450 F