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Description
Technical Specifications
- MFG. Part Number 103-066-0054
Vehicle Information
Honda CR125R Dirt Bike (1979-2008)
The Honda CR125R was a highly regarded motocross motorcycle produced from 1979 to 2007. Known for its agility and performance on the track, this model consistently featured a liquid-cooled, single-cylinder, two-stroke engine, typically ranging from 123cc to 125cc. While not offered with distinct trim levels, the CR125R underwent numerous significant revisions throughout its production. Key generational shifts included a complete chassis and engine redesign in 1983, the introduction of the HPP motor in 1990, and a major overhaul with a new aluminum frame in 1998. Further significant updates to the aluminum frame and engine technology, such as the RC valve, occurred in 2000, 2002, and 2005, ensuring continuous evolution of its performance capabilities. The model was discontinued after the 2007 model year. FAQ:
Q: How do I find parts specific to my CR125R?
A: To ensure perfect compatibility, please use the year and edition selector at the top of the page.
Maintenance
| Component | Interval | Details |
| Engine Oil (Transmission Oil) | 5 to 15 hours depending on year and riding intensity | Lubricates transmission and clutch. The CR125R is a two-stroke and does not have a separate engine oil system. |
| Oil Filter (screen) | Periodic cleaning | The CR125R uses a screen filter, not a spin-on filter. Clean during transmission oil changes or more extensive maintenance. |
| Spark Plug | Inspect and replace every 10 to 20 hours or as needed | |
| Air Filter | 3 to 15 hours depending on year and riding conditions | Clean or replace more frequently in dusty or muddy conditions. |
| Coolant | Check level at every refueling; periodic replacement | Inspect level and condition. More frequent replacement recommended for competition use. |
| Top-End Inspection (piston and cylinder) | 30 to 50 hours depending on riding intensity | |
| Bottom-End Inspection (crankshaft and bearings) | 30 to 100 hours depending on year and riding intensity | |
| Power Valve System | Every 20 hours | Valve inspections. |