Standard Bore Cylinder Kit Ø 54 mm, 125 cc
Same reliability and performance of the original components
Maximum durability and smoothness guaranteed by a special nickel and silicon treatment
Gaskets developed with the most advanced technologies to ensure maximum tightness even at high temperatures and pressures
WARNING: For installing this cylinder kit on the models YZ 125 LC 1997-1998, please replace the original exhaust muffler with 1999-2003 version and for the models 1997-1999 are absolutely necessary 2 original Yamaha torsion springs (valve) year 2000-2003.
Race Use Only Product - Please check details on the "Race use only" footer's section
WARNING: the cylinder head and base gaskets contained in the kit are specifically developed for Athena cylinders kits. Whenever the cylinder kit is disassembled, replace the gaskets with the specific Athena spare gasket kit: DO NOT use OE replacement gaskets.
Description
Athena has been constantly investing in cylinder aftermarket replacement parts for more than ten years, to improve their production and performance.
All the cylinders are entirely engineered in Italy by Athena’s R&D Department which has a strong internal know-how and cutting-edge tools to design and test each piece. They are coated with motor-nicksil, a nickel-silicon coating developed by Athena to obtain smoothness and optimal wear resistance.
Athena’s cylinder kits and its components are recognized worldwide for their performance, durability and reliability.
The Standard Bore cylinder kit developed by Athena guarantees the same performance as the original spare parts, extreme reliability and optimal smoothness as a result of the lightweight aluminum cylinder, the barrel with nickel-silicon coating, and a piston designed to reduce further friction.
The kit includes the high-quality aluminum cylinder with standard bore, the cylinder head with interchangeable central dome, the complete piston with the piston pin and rings, and all the necessary gaskets.
All the components of the kit have been developed to withstand the highest temperatures, pressures and stresses and have been validated by Athena technicians with severe bench and road tests.
This cylinder kit can be installed without making any changes to the engine crankcase.
CAUTION! All Athena products must be used in compliance with the specific national regulations of the member state where it is being marketed or sold. Athena declines all responsibility for any improper use.
Technical features
| Bore Diameter (mm) | 54.00 |
| Compression Ratio | 14.8:1 |
| Displacement (cc) | 125.00 |
| Net Weight (Kg) | 2.69 |
Vehicle compatibility
| YAMAHA YZ 125 cc 1997/2004 |
- Net Weight (Kg): 0.06
- Bore Diameter (mm): 53.94
- Displacement (cc): 125.00
- Big End Pin Diameter (mm): 15x10x45
- Number Of Segments: 1
- Bore Diameter (mm): 53.95
- Displacement (cc): 125.00
- Big End Pin Diameter (mm): 15x10x45
- Number Of Segments: 1
- Net Weight (Kg): 0.40
- Net Weight (Kg): 0.08
- Net Weight (Kg): 0.27
- Net Weight (Kg): 0.24
- Net Weight (Kg): 0.01
- Line: Enduro
- Net Weight (Kg): 0.00
- Bore Diameter (mm): 54.00
- Displacement (cc): 125.00
- Compression Ratio: 14.8:1
- Net Weight (Kg): 2.72
- Bore Diameter (mm): 54.00
- Displacement (cc): 125.00
- Compression Ratio: 14.8:1
- Net Weight (Kg): 2.24
- Bore Diameter (mm): 54.00
- Displacement (cc): 125.00
- Compression Ratio: 14.8:1
- Net Weight (Kg): 2.40
- Bore Diameter (mm): 54.00
- Displacement (cc): 125.00
- Compression Ratio: 14.3:1
- Net Weight (Kg): 2.05
- Bore Diameter (mm): 54.00
- Displacement (cc): 125.00
- Compression Ratio: 14.7:1
- Net Weight (Kg): 1.94
- Bore Diameter (mm): 56.00
- Displacement (cc): 249.00
- Compression Ratio: 12.0:1
- Bore Diameter (mm): 77.00
- Displacement (cc): 250.00
- Compression Ratio: 13.4:1
- Net Weight (Kg): 1.55
- Bore Diameter (mm): 77.00
- Displacement (cc): 250.00
- Compression Ratio: 12.6:1
- Net Weight (Kg): 1.58
- Net Weight (Kg): 0.06
- Oil Seal Height (mm): 11.00
- Oil Seal External Diameter (mm): 54.00
- Oil Seal Internal Diameter (mm): 41.00
- Net Weight (Kg): 0.40
- Net Weight (Kg): 0.06
- Oil Seal Height (mm): 10.50
- Oil Seal External Diameter (mm): 53.00
- Oil Seal Internal Diameter (mm): 41.00
- Net Weight (Kg): 0.05
- Oil Seal Height (mm): 11.00
- Oil Seal External Diameter (mm): 54.00
- Oil Seal Internal Diameter (mm): 43.00
- Net Weight (Kg): 0.05
- Oil Seal Height (mm): 10.50
- Oil Seal External Diameter (mm): 52.00
- Oil Seal Internal Diameter (mm): 40.00
- Net Weight (Kg): 0.05
- Oil Seal Height (mm): 11.00
- Oil Seal External Diameter (mm): 48.00
- Oil Seal Internal Diameter (mm): 35.00
- Manufacturer: NOK
- Net Weight (Kg): 0.05
- Oil Seal Height (mm): 11.50
- Oil Seal External Diameter (mm): 57.90
United States