HGS Fantic Black 2 Stroke Round Silencer XX 125 2021-2024 YFZ450 0 cap will keep that

0 cap will keep that coolant in the radiator at higher temps and allow you to maintain coolant levels throughout the race

but we are finding not much adjustment is required to achieve good fork action across the common spring rates from our recommended setting

2016-2025 KTM 125/150 SX

Compression RatioSTD

HGS Fantic Black 2 Stroke Round Silencer XX 125 2021-2024 YFZ450 0 cap will keep that2 Stroke Silencers Factory style finish. Unrivalled HP increase. Improved throttle response. HGS exhausts are designed to work as a system unless otherwise stated. The above product photos are used for illustration purposes only and may vary slightly.