MFORK Bitubo springs kit for fork cartridges. From intensive use on the track or for quieter touring, replacing the fork springs is almost an obligatory step in order to customize the response of the front end to your needs and riding characteristics. Bitubo with the MFORK line is among the best components for upgrading the front of your bike. The springs guarantee very high performance, constant over time and durability thanks to the construction in chromium/silicon alloy steel with heat treatment, shot peening and final settling. Bitubo offers 2 types of Linear fork springs (Available with different stiffness calibrations) designed for sporty driving which requires uniform response over the entire excursion of the front axle and Progressive ones suitable for touring use offering riding comfort, stability and safety even with high loads on board. The kit includes the specific Bitubo-Silkolene oil with the exact gradation resulting from the experience gained by the Bitubo development team. Assembly instructions are also supplied complete with oil level indications and relative quantities. Specific for: Honda CBR600F New no Abs 2011>2013. Specifica per cartuccia/forcella: JBH-V1. Material: Cr/Si treated steel. Bitubo/Silkolene forks oil included. Warning: the Bitubo cartridge springs of the MX series are compatible only with original Bitubo cartridges, they do NOT fit on cartridges of different brands and original (OEM).