KIWI RIDER 51 NZ MX 2021 RIDER Name : Josiah Natzke Age : 22 Class : MX2 Current ranking : # 2 Mechanic : Matt Crothers SPONSORS Bridgestone , RK Chain , Polisport , Putoline , Mainstream , Koromiko Engineering , CFX Seats , MSpec Suspension , Renthal , MTX Sprocket , No Toil , Good Buzz Kombucha , Alpinestars , Un4seen Decals . BIKE Model : KAWASAKI KX250 Brake pads : Standard Sprockets : MTX Chain : RK 520 MXZ4 Exhaust system : Pro Circuit Grips : Renthal Handle bars : Standard ( Renthal ) Levers : Standard Seat cover : CFX Air Filter : Putoline Oil : Putoline Tyres : Bridgestone X20 and X30 Tubes : IRC Mousse : n / a Graphics : Un4seen