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New products
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Can-Am X3 Heavy Duty Rear Plate
50 Caliber Racing Heavy Duty Rear Plate for Can-Am X3 and X3 MAX Toss...
$ 39.00 -
Custom Billet Grille RZR XP1000 / XP Turbo / S 2019
50 Caliber Racing Custom CNC Billet Aluminum Grille for 2019 RZR XP1000,...
$ 159.00 -
Pocket Bike Gearbox 6 Tooth for 25H Chain
Brand New Gearbox for water cooled Pocket bikes - 6 Tooth, 25H Chain...
$ 30.00 -
16T Sprocket for 25H Chain
ScooterX 16 Tooth Sprocket - 25H Chain Size for Go Karts with 33-52cc...
$ 14.00 -
Scooter Transmission with 25T sprocket
Brand New Transmission for Scooters & Go Karts with 33-52cc Gas...
$ 45.00 -
Scooter Transmission with 20T sprocket
Brand New Transmission for Scooters & Go Karts with 33-52cc Gas...
$ 45.00 -
Scooter Transmission with 17T sprocket
Brand New Transmission for Scooters & Go Karts with 33-52cc Gas...
$ 45.00 -
XP Turbo CNC Billet Radius Rods
50 Caliber Racing Heavy Duty Radius Rod Kit for RZR XP Turbo (fits both...
$ 349.00
Top End & Big Bore Kits There are 17 products.
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$ 59.00Yamaha TTR 125 Top End Cylinder Rebuild Kit
50 Caliber Racing Top End Cylinder Kit for Yamaha TTR 125 2000-2005 - Stock Bore Size Complete top end rebuild kit for your Yamaha TTR125! Our kits are high quality, complete and ready to build right out of the box. Bolt on kit with no modifications required. Fits the following Yamaha models: Yamaha TTR125 (2000-2005)
$ 59.00 -
$ 99.00KTM 50 Air Cooled Top End Cylinder Kit...
50 Caliber Racing Top End Cylinder Kit for KTM 50 Air Cooled Pit Bikes 2002-2008 - Standard Bore Complete top end rebuild kit for your KTM 50 Pit Bike! Our kits are high quality, complete and ready to build right out of the box. Bolt on kit with no modifications required. Fits the following Air Cooled KTM 50cc dirt bikes: - Mini Adventure (2002-2008) -...
$ 99.00 -
$ 84.00KTM 50 Water Cooled Top End Cylinder Kit...
50 Caliber Racing Top End Cylinder Kit for KTM 50 Water Cooled Pit Bikes 2002-2008 - Standard BoreComplete top end rebuild kit for your KTM 50 Pit Bike! Our kits are high quality, complete and ready to build right out of the box. Bolt on kit with no modifications required. Fits the following Liquid Cooled KTM 50cc dirt bikes: - Junior LC (2002-2008) -...
$ 84.00 -
$ 84.00Yamaha PW50 Big Bore Kit 60cc With Head
50 Caliber Racing 60cc Big Bore Top End Kit with Head Included for Yamaha PW50 & QT50 Pit Bikes Bolt on 60cc Big Bore Kit for Yamaha PW50 and QT50 Pit Bikes. This is a complete top end cylinder kit including head, ready to install out of the box. Includes a new cylinder head. Breathe new life into your kid's bike with our high quality, affordable and...
$ 84.00 -
$ 59.00Yamaha PW50 Big Bore 60cc Top End Kit
50 Caliber Racing 60cc Big Bore Top End Kit for Yamaha PW50 & QT50 Pit Bikes Bolt on 60cc Big Bore Kit for Yamaha PW50 and QT50 Pit Bikes. This is a complete top end cylinder kit, ready to install out of the box. Breathe new life into your kid's bike with our high quality, affordable and reliable big bore kit!
$ 59.00 -
$ 26.00High Volume Oil Pump - Honda Pit Bikes...
50 Caliber Racing High Volume Oil Pump - Honda Pit Bikes CRF50 XR50 CRF70 XR70High volume oil pump for Honda 50cc Pit Bikes. Delivers up to 3 times the flow of the stock pump, which will help reduce wear and prolong the life of your engine. This pump is highly recommended when installing a big bore kit. Includes pump and gasket.
$ 26.00 -
$ 32.00High Volume Oil Pump - Vintage Honda 69-81...
High Volume Oil Pump - Vintage Honda Z50 High volume oil pump for vintage Honda pit bikes and small ATVs. Delivers up to 3x the volume as the stock pump. We highly recommend upgrading your oil system when installing a big bore kit. Installation requires 2mm drill out of oiling outlet.
$ 32.00 -
$ 59.00Yamaha PW80 Top End Rebuild Kit Stock Bore
50 Caliber Racing Top End Cylinder Kit for Yamaha PW80 - Stock Bore Complete Replacement Top End Kit for Yamaha PW80 Engines. Lightweight aluminum cylinder with steel sleeve. Oversize cooling fins on cylinder for efficient heat dissipation. Manufactured to OEM spec, our kits are complete, high quality and will extend the life of your toys for many more...
$ 59.00 -
$ 54.00Yamaha PW50 Top End Cylinder Kit
50 Caliber Racing Top End Rebuild Kit for Yamaha PW50 Pit BikesCast aluminum cylinder with black powdercoating for a vintage Yamaha look. Standard compression and stock bore size for an all original spec replacement top end kit. Includes everything needed to rebuild your top end. These kits are very high quality and will last for years under normal use....
$ 54.00 -
$ 359.00Race Head V2 Upgrade for Lifan 150cc 160cc...
150/160cc YX/GPX Race Head V2 Upgrade Kit: - Race Head V2 - Roller rockers, 30mm intake valve, 24.5mm exhaust valve, 27mm intake port, 23mm exhaust port. (valves installed)
$ 359.00 -
$ 499.00108cc Stroker Kit 2 for Honda 50 70 Pit Bikes
50 Caliber Racing 108cc Stroker Kit #2 for Honda CRF50, XR50, CRF70, XR70 pit bikes This is hands down the biggest and baddest big bore kit we offer for your Honda 50cc and 70cc pit bike. Complete with 51mm stroker crank and 52mm piston & cylinder, this kit will increase total displacement to 108cc. This kit includes everything in our Stage 2 Race...
$ 499.00 -
$ 229.00108cc Stroker Kit 1 for Honda CRF50, XR50...
50 Caliber Racing 108cc Stroker Kit #1 for Honda CRF50, XR50, CRF70, XR70 pit bikesReady for more power? Designed as a next-stage upgrade from our 88cc Race Head Big Bore kit, this kit will increase displacement to 108cc and adds approximately 2 horsepower. All the components are made specifically for 1988 and newer engines so there will be no fitment...
$ 229.00