Yamaha YB125 54 mm Cylinder Barrel & Piston Kit
Standard 54 mm top-end rebuild kit for Yamaha YB125 motorcycles using the matching Yamaha 5VL/YBR-pattern engine. Supplied with the cylinder barrel, standard piston, rings, pin, circlips, valve-stem seals and top-end gaskets required for the repair.
Kit Contents
- 54 mm air-cooled cylinder barrel
- Standard-size piston
- Complete piston-ring set
- Gudgeon / wrist pin
- 2 piston-pin circlips
- 2 valve-stem oil seals
- Cylinder-head gasket
- Cylinder-base gasket
- Cam-chain-tensioner gasket
A complete standard-bore top-end replacement set for repairing a worn, scored or damaged cylinder and piston assembly.
Specification
- Nominal bore: 54 mm
- Nominal capacity: 124/125 cc with the standard crankshaft stroke
- Engine type: air-cooled 4-stroke single-cylinder Yamaha/YBR-pattern engine
- Replacement type: standard bore, not a big-bore conversion
- Product type: unbranded aftermarket replacement
OE / Manufacturer Cross References
- Yamaha cylinder reference: 5VL-E1310-10-00
- Yamaha standard piston reference: 5VL-E1631-10-00
- Yamaha cylinder-head gasket reference: 5VL-E1181-00-00
- Yamaha cylinder-base gasket reference: 5VL-E1351-10-00
- Airsal 54 mm reference family: 02126854, 06126854, 11126854, 14126854
Reference numbers are provided to help identify the compatible Yamaha-pattern engine family. They do not mean the unbranded kit supplied was manufactured by Yamaha or Airsal.
Fitment
- Yamaha YB125 models using the 54 mm Yamaha/YBR-pattern engine
- Airsal's 54 mm manufacturer catalogue groups YB125 with the YBR125 / XTZ125 engine family
- Confirm the original cylinder and piston dimensions before ordering
Compatibility Check
Check the original engine before ordering. Compare the cylinder shape, 54 mm bore, cylinder stud pattern, cam-chain tunnel, piston crown, gudgeon-pin size and gasket profiles with the kit shown. Model names can cover more than one engine specification, particularly on imported or later-production motorcycles.
If the original cylinder has been rebored, the engine has previously been converted to a larger capacity, or the engine number/specification does not match the Yamaha/YBR-pattern unit, this standard 54 mm kit may not be suitable.
Installation Notes
Clean all gasket faces and oil passages before assembly. Check piston-to-cylinder clearance, piston-ring end gaps and ring orientation before fitting. Install the piston with the correct orientation, use new gaskets and circlips, and tighten the cylinder/head fasteners to the motorcycle manufacturer's workshop specifications. Check valve timing and valve clearances before starting the engine.
Delivery & Returns
- Free UK delivery with an estimated 2-3 working-day service
- 30-day returns, subject to the item being returned in its original condition