Engine

- Keeps Hands Warm
- Keeps Beers Cold
- 2 Sided Print, 1 side 50 cal logo, other side slogan
- Multiple designs to choose from

50 Caliber Racing Honda Z50 Stage 1 vintage big bore kit. Improved lightweight 52mm piston and cylinder design, with oversized cooling fins for efficient heat dissipation. Includes all gaskets needed for install.

- Z50 (1968-1978)
- CT70 (1968-1981)
- ATC70 (1973-1985)
- TRX70 (1986-1987)
- SL70 (1971-1973)
- XL70 (1974-1976)

50 Caliber Racing 27mm PZ27 Carburetor. This carburetor fits a large variety of 150cc to 250cc dirt bikes, go karts, ATVs and more. Intake throat diameter: 27mm, Bolt hole spacing: 48mm, Air intake mount diameter: 40mm.

Main jet kit designed to fit a 50 Caliber Racing 20mm performance carburetor (part #4211). This kit includes sizes: 82, 85, 87, 90, 92, & 95. The carburetor is equipped with an 89. Will also fit 20mm Keihin carburetors. Get your bike tuned to perfection with our high-quality jet kit.

50 Caliber Racing 108cc Stroker Kit #2 for Honda CRF50, XR50, CRF70, XR70 pit bikes is 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 Head kit, plus a 51mm stroker crank which will add up to an additional 2 horsepower over a standard 88cc race head kit.

50 Caliber Racing 108cc stroker kit #1 for Honda CRF50, XR50, CRF70, XR70 pit bikes adds approximately 2 horsepower over your stock setup! All the components are made specifically for 1988 and newer engines so there will be no fitment issues and no boring of the case necessary. A Honda engine upgraded with this kit will make much more power than Chinese Honda clones up to 125cc.

50 Caliber Racing Ignition Stator Assembly with Rotor for KTM 50 Pit Bikes are manufactured to OEM spec. Replaces Part # 45139004000, 45139005100. Fits most SX (2002-2008) bikes.

Piston Kit with Standard Bore for KTM 50cc Pit Bikes, 2002-2008. Complete assembly including piston, wrist pin, needle bearing, rings and clips. Our kits are high quality, complete and ready to build right out of the box. You'll be able to take confidence that you'll have the precision components you need to get your toys running again, the right way. Be a superdad and fix your kid's bike!

50 Caliber Racing Aftermarket Replacement 19mm Carburetor for KTM 50 Pit Bikes. Oil port delete, for premix fuel only.

50 Caliber Racing Complete Replacement Carburetor and Intake Kit for KTM 50cc Pit Bikes (2002-2019) is designed to be a stock size replacement for your OEM parts. Comes with a new intake, throttle cable and, high flow - washable air filter.

50 Caliber Racing OEM Style Expansion Pipe with Silencer for (2002-2008) KTM SX50 50cc Pit Bikes. Includes black painted steel expansion pipe and aluminum silencer. Stock diameter and manufactured to OEM spec for an exact fit.

20mm carburetor for Yamaha PW50 Pit Bikes is a top quality aftermarket replacement part. Manufactured to OEM spec for easy bolt on replacement. Restore lost power and fix cold start issues, while saving both time and money. Replaces OEM part number: 5PG-14101-11-00

Replacement 20mm Carburetor for Yamaha PW80

Brand new top quality aftermarket replacement carburetor. Manufactured to OEM spec for easy bolt on replacement. Restore lost power and fix cold start issues, while saving both time and mone. Why spend time cleaning and adjusting an old worn out carburetor when you can bolt this one on and go riding!

50 Caliber Racing 60cc Big Bore Top End Kit with Head included for Yamaha PW50 & QT50 Pit Bikes. This is a complete bolt on top end cylinder kit including head, ready to install out of the box. Includes a new cylinder head.

50 Caliber Performance CDI Rev Box for Honda CRF50F XR50R Pit Bikes. This rev box will remove the stock rev limiter and allow your pit bike to max out its performance and rpms. Improved timing curve. Great bang for the buck! Fits all years of Honda XR50 and CRF50

Fuel Line by the Foot- 3/8 fuel line. This fuel line has an 3/16 inch ID and 3/8" OD.

Fuel Lines by the Foot 1/8" ID - 5/16" OD. This fuel line has an 1/8" ID and 5/16" OD.

1.25 inch black foam filter (32mm)

50 Caliber Racing Performance Mesh Air Filter for CRF50 XR50 Pit Bikes. Performance mesh air filter fits all carburetors with a 1" OD round inlet. This filter will fit stock and aftermarket carburetors for XR50 and CRF50 Pit Bikes. Engine will be able to breathe better, giving you more airflow, and more power. If you are running an aftermarket pipe this filter is recommended for maximum performance. Will fit most carburetors that have a 1" inlet.

50 Caliber Racing 1.35" Performance Air Filter. This will fit any carburetor that has a 32mm, 33mm 34mm, 35mm, or 36mm diameter filter side. Better air flow than stock filter means more power, and it is washable.

50 Caliber Racing 5 pin CDI Rev Box for use with most common 50cc - 125cc Chinese made pit bikes, ATV engines, Roketa, and others. If you have a China made pit bike or small ATV, and your CDI plug looks the same as pictured, it will work with your machine.

50 Caliber Racing High Performance Camshaft with much more aggressive lift and duration. Increase power with a simple camshaft change. Goes well with big bore kits and aftermarket CDI. Fits Honda CRF50 and CRF70 pit bikes.

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 a 2mm drill-out of the oiling outlet.

50 Caliber Racing 20mm performance carburetor for Honda pit bikes with 88cc big bore engines. If you have installed a big bore kit, the stock carburetor is too small and will starve the engine for air and fuel. This carburetor offers increased airflow to meet the demand of 88cc and up big bore engines.

- Fits Honda Z50, XR50, CRF50, XR70, CRF70 with 88c-up big bore engines