Yamaha YBR125 / YBR125 Custom 54 mm Cylinder & Piston Kit
Standard-bore replacement cylinder and piston top-end kit for Yamaha YBR125 and YBR125 Custom models using the 54 mm 5VL-series engine specification. Ideal for a top-end rebuild where the original cylinder or piston is worn, scored, seized or has low compression.
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
Yamaha OE Reference Numbers
- Cylinder: 5VL-E1310-10-00
- Standard piston: 5VL-E1631-10-00
- Cylinder-head gasket: 5VL-E1181-00-00
- Cylinder-base gasket: 5VL-E1351-10-00
OE numbers are supplied for identification and comparison. The item supplied is an aftermarket replacement and is not represented as a genuine Yamaha part.
Manufacturer Cross References
- Airsal 54 mm reference family: 02126854
- Airsal related reference: 06126854
- Airsal related reference: 11126854
- Airsal related reference: 14126854
Fitment
- Yamaha YBR125 - selected 2005-2017 applications using the 54 mm 5VL-series cylinder
- Yamaha YBR125 Custom - applications using the same 54 mm Yamaha engine specification
- Confirm against OE cylinder 5VL-E1310-10-00 and the original engine 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