Showa 49mm SFF Fork Spring / Air Hybrid Conversion Kit

This was one of PR2’s first designs of their Hybrid Spring/Air conversion kits that allowed you to adjust spring preload externally. The only issue was that depending on bar/bar mount position it would be tough to check the air pressure hence why the pre load adjuster got chopped on the final version so the air valve could be moved to a easier location. If your bar position or fork tube height allows the clearance for this kit though it is a AWESOME version that allows a ton of adjustability to setup your fork just right for personal preference or track conditions. This kit was only used as in 1 test session and will come with an extra piston band & o-ring for your future service and comes with everything needed for the conversion besides the spring.

Looking to get $400 shipped

Here is what they have to say about this style of kit on their website...

“This innovative new Cartridge System is designed to offer Fork performance that has yet to be offered in Motocross/Off-Road motorcycles. The system is a Coil Spring conversion supplemented by an Air Spring Cylinder. While a Coil Spring is known to offer maintenance free plush fork performance, it lacks the progressive build of force that the Air Spring Forks have to offer. Now a rider can have both in the same system!! The Hybrid Spring/Air Conversion supports the bike weight and initial part of the stroke with a Coil Spring while building pressure in the Air Spring as the fork progresses further into its travel. While remaining extremely simple, this system is a tuners dream. Used in its most simple form, a rider would set up his fork with his "normal" preferred spring rate on any Spring fork system and leaving the Air Pressure at "zero" and allowing the pressure to build as the forks goes through the travel. The pressure inside the fork will go from zero psi to hundreds of psi at the end of the stroke giving additional bottoming resistance over a normal Spring Fork. For the more advanced tuner and incredible for Off-Road and Woods a rider can install a Coil Spring a couple of rates lighter than normal and supplement the rate by using a very low pressure Air in the fork (per instructed pressure) to make a very predictable consistent tuning parameter resulting in razor sharp turning that is just not possible in most Air only Fork systems.”