SIP Stabilizer Kit Motor Pinion. Our new Stabilizer Kit utilizes a newly designed motor pinion to catch the side flex. The entire suspension will have to be removed and replaced through a stable steel part, which will enable your scooter to glide smoothly through curves as well as behave well - even at high speeds. The powder surface coated pinion is equipped with maintenance free bearings which replace the old plastic bearings with stabile PTFE coated PK1 specialty metal sockets that have higher dry-running properties. The bearings in this light weight toughy won't give you any nasty surprises - like the series parts which can give out. Simply assembly.