TWIN AIR Radiator Cap 2.0 bar for KTM, HUSQVARNA and GAS GAS 2016-2023

The TWIN AIR 2.0 bar 177902 radiator cap is designed for KTM EXC 125, EXC 200, EXC 250, EXC 300, EXCF 250, EXCF 350, EXCF 450, EXCF 500, SX 125, SX 150, SX 250, SXF 250, SXF 350, SXF 450, XC 150, XC 250, XC 300, HUSQVARNA FC 250, FC 350, FC 450, FE 250, FE 350, FE 450, FE 501, FX 350, FX 450, TC 125, TC 250, TE 125, TE 150, TE 250, TE 300, TX 125, TX 300 and GAS GAS EC 250, EC 300, ECF 250, ECF 350, EX 300, EXF 250, EXF 350, EXF 450, MC 125, MC 250, MCF 250, MCF 450 from 2016 to 2023. It isn't just a lid: its spring and seal set the system pressure. A tired cap lets coolant escape through the overflow, and the engine ends up overheating.

Specifications

• Brand: TWIN AIR
• Manufacturer part number: 177902
• EAN code: 8720239732733
• Opening pressure: 2.0 bar

When to replace it?

• Coolant escaping through the overflow.
• Cap seal hardened, split or deformed.
• Coolant boiling when stopped or at low speed, in the mud or at the start.

Replace the cap if its seal is damaged or if the system loses coolant with no visible leak. A high-pressure cap also raises the pressure the hoses and radiators have to withstand: they must be in good condition.

Fitting tips

1. Engine cold only: never open a hot system, the pressurised coolant can cause serious burns.
2. Check the radiator filler neck: it must be clean, with no burrs or deformation.
3. Check the coolant level, then fit the new cap and turn it until it stops.
4. After the first ride, check for leaks at the hoses and radiators.

Why TWIN AIR?

Twin Air, a Dutch brand founded in 1972, makes foam air filters and intake accessories for off-road riding. According to the brand, its filters are chosen as original equipment by more than 30 manufacturers.

Spare parts and items to plan

• Coolant : LIQUI MOLY 1 L · TWIN AIR

Frequently asked questions

Which pressure should I choose?
The opening pressure is given in the name and specifications; the stock pressure is in your bike's manual. A cap rated at a higher pressure delays boiling.

Is a high-pressure cap worthwhile on my bike?
Mainly if the engine loses coolant when it gets hot (starts, mud, slow terrain). If the bike doesn't run hot, a stock cap in good condition is enough.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS EC 250 2022
GAS GAS EC 250 2021
GAS GAS EC 300 2022
GAS GAS EC 300 2021
GAS GAS ECF 250 2022
GAS GAS ECF 250 2021
GAS GAS ECF 350 2022
GAS GAS ECF 350 2021
GAS GAS EX 300 2023
GAS GAS EX 300 2022
GAS GAS EX 300 2021
GAS GAS EXF 250 2023
GAS GAS EXF 250 2022
GAS GAS EXF 250 2021
GAS GAS EXF 350 2023
GAS GAS EXF 350 2022
GAS GAS EXF 350 2021
GAS GAS EXF 450 2023
GAS GAS EXF 450 2022
GAS GAS EXF 450 2021
GAS GAS MC 125 2022
GAS GAS MC 125 2021
GAS GAS MC 250 2022
GAS GAS MC 250 2021
GAS GAS MCF 250 2022
GAS GAS MCF 250 2021
GAS GAS MCF 450 2022
GAS GAS MCF 450 2021
HUSQVARNA FC 250 2022
HUSQVARNA FC 250 2021
HUSQVARNA FC 250 2020
HUSQVARNA FC 250 2019
HUSQVARNA FC 250 2018
HUSQVARNA FC 250 2017
HUSQVARNA FC 250 2016
HUSQVARNA FC 350 2022
HUSQVARNA FC 350 2021
HUSQVARNA FC 350 2020
HUSQVARNA FC 350 2019
HUSQVARNA FC 350 2018
HUSQVARNA FC 350 2017
HUSQVARNA FC 350 2016
HUSQVARNA FC 450 2022
HUSQVARNA FC 450 2021
HUSQVARNA FC 450 2020
HUSQVARNA FC 450 2019
HUSQVARNA FC 450 2018
HUSQVARNA FC 450 2017
HUSQVARNA FC 450 2016
HUSQVARNA FE 250 2022
HUSQVARNA FE 250 2021
HUSQVARNA FE 250 2020
HUSQVARNA FE 250 2019
HUSQVARNA FE 250 2018
HUSQVARNA FE 250 2017
HUSQVARNA FE 350 2022
HUSQVARNA FE 350 2021
HUSQVARNA FE 350 2020
HUSQVARNA FE 350 2019
HUSQVARNA FE 350 2018
HUSQVARNA FE 350 2017
HUSQVARNA FE 450 2022
HUSQVARNA FE 450 2021
HUSQVARNA FE 450 2020
HUSQVARNA FE 450 2019
HUSQVARNA FE 450 2018
HUSQVARNA FE 450 2017
HUSQVARNA FE 501 2022
HUSQVARNA FE 501 2021
HUSQVARNA FE 501 2020
HUSQVARNA FE 501 2019
HUSQVARNA FE 501 2018
HUSQVARNA FE 501 2017
HUSQVARNA FX 350 2022
HUSQVARNA FX 350 2021
HUSQVARNA FX 350 2020
HUSQVARNA FX 350 2019
HUSQVARNA FX 350 2018
HUSQVARNA FX 350 2017
HUSQVARNA FX 450 2022
HUSQVARNA FX 450 2021
HUSQVARNA FX 450 2020
HUSQVARNA FX 450 2019
HUSQVARNA FX 450 2018
HUSQVARNA FX 450 2017
HUSQVARNA TC 125 2022
HUSQVARNA TC 125 2021
HUSQVARNA TC 125 2020
HUSQVARNA TC 125 2019
HUSQVARNA TC 125 2018
HUSQVARNA TC 125 2017
HUSQVARNA TC 125 2016
HUSQVARNA TC 250 2022
HUSQVARNA TC 250 2021
HUSQVARNA TC 250 2020
HUSQVARNA TC 250 2019
HUSQVARNA TC 250 2018
HUSQVARNA TC 250 2017
HUSQVARNA TC 250 2016
HUSQVARNA TE 125 2022
HUSQVARNA TE 125 2021
HUSQVARNA TE 125 2020
HUSQVARNA TE 125 2019
HUSQVARNA TE 125 2018
HUSQVARNA TE 125 2017
HUSQVARNA TE 125 2016
HUSQVARNA TE 150 2022
HUSQVARNA TE 150 2021
HUSQVARNA TE 150 2020
HUSQVARNA TE 150 2019
HUSQVARNA TE 150 2018
HUSQVARNA TE 150 2017
HUSQVARNA TE 250 2022
HUSQVARNA TE 250 2021
HUSQVARNA TE 250 2020
HUSQVARNA TE 250 2019
HUSQVARNA TE 250 2018
HUSQVARNA TE 250 2017
HUSQVARNA TE 300 2022
HUSQVARNA TE 300 2021
HUSQVARNA TE 300 2020
HUSQVARNA TE 300 2019
HUSQVARNA TE 300 2018
HUSQVARNA TE 300 2017
HUSQVARNA TX 125 2022
HUSQVARNA TX 125 2021
HUSQVARNA TX 125 2020
HUSQVARNA TX 125 2019
HUSQVARNA TX 125 2018
HUSQVARNA TX 125 2017
HUSQVARNA TX 125 2016
HUSQVARNA TX 300 2022
HUSQVARNA TX 300 2021
HUSQVARNA TX 300 2020
HUSQVARNA TX 300 2019
HUSQVARNA TX 300 2018
HUSQVARNA TX 300 2017
KTM EXC 125 2023
KTM EXC 125 2022
KTM EXC 125 2021
KTM EXC 125 2020
KTM EXC 125 2019
KTM EXC 125 2018
KTM EXC 125 2017
KTM EXC 200 2023
KTM EXC 200 2022
KTM EXC 200 2021
KTM EXC 200 2020
KTM EXC 200 2019
KTM EXC 200 2018
KTM EXC 200 2017
KTM EXC 250 2023
KTM EXC 250 2022
KTM EXC 250 2021
KTM EXC 250 2020
KTM EXC 250 2019
KTM EXC 250 2018
KTM EXC 250 2017
KTM EXC 300 2023
KTM EXC 300 2022
KTM EXC 300 2021
KTM EXC 300 2020
KTM EXC 300 2019
KTM EXC 300 2018
KTM EXC 300 2017
KTM EXCF 250 2023
KTM EXCF 250 2022
KTM EXCF 250 2021
KTM EXCF 250 2020
KTM EXCF 250 2019
KTM EXCF 250 2018
KTM EXCF 250 2017
KTM EXCF 350 2023
KTM EXCF 350 2022
KTM EXCF 350 2021
KTM EXCF 350 2020
KTM EXCF 350 2019
KTM EXCF 350 2018
KTM EXCF 350 2017
KTM EXCF 450 2023
KTM EXCF 450 2022
KTM EXCF 450 2021
KTM EXCF 450 2020
KTM EXCF 450 2019
KTM EXCF 450 2018
KTM EXCF 450 2017
KTM EXCF 500 2023
KTM EXCF 500 2022
KTM EXCF 500 2021
KTM EXCF 500 2020
KTM EXCF 500 2019
KTM EXCF 500 2018
KTM EXCF 500 2017
KTM SX 125 2022
KTM SX 125 2021
KTM SX 125 2020
KTM SX 125 2019
KTM SX 125 2018
KTM SX 125 2017
KTM SX 125 2016
KTM SX 150 2022
KTM SX 150 2021
KTM SX 150 2020
KTM SX 150 2019
KTM SX 150 2018
KTM SX 150 2017
KTM SX 150 2016
KTM SX 250 2022
KTM SX 250 2021
KTM SX 250 2020
KTM SX 250 2019
KTM SX 250 2018
KTM SX 250 2017
KTM SX 250 2016
KTM SXF 250 2022
KTM SXF 250 2021
KTM SXF 250 2020
KTM SXF 250 2019
KTM SXF 250 2018
KTM SXF 250 2017
KTM SXF 250 2016
KTM SXF 350 2022
KTM SXF 350 2021
KTM SXF 350 2020
KTM SXF 350 2019
KTM SXF 350 2018
KTM SXF 350 2017
KTM SXF 350 2016
KTM SXF 450 2022
KTM SXF 450 2021
KTM SXF 450 2020
KTM SXF 450 2019
KTM SXF 450 2018
KTM SXF 450 2017
KTM SXF 450 2016
KTM XC 150 2022
KTM XC 150 2021
KTM XC 150 2020
KTM XC 150 2019
KTM XC 150 2018
KTM XC 150 2017
KTM XC 150 2016
KTM XC 250 2022
KTM XC 250 2021
KTM XC 250 2020
KTM XC 250 2019
KTM XC 250 2018
KTM XC 250 2017
KTM XC 250 2016
KTM XC 300 2022
KTM XC 300 2021
KTM XC 300 2020
KTM XC 300 2019