Keihin replacement fuel injector are offered as a factory replacement, 690cc or 825cc size for modified engines.
OEM Part # 79041023044. 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)
Fits the following models:
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
