| Specification | Technical Data |
|---|---|
| Model Series | ME12A / ME12R / ME1224 |
| Engine Oil | SAE 10W-30 (JASO T 903 MA) / 1.08 Liters |
| Spark Plug | NGK SILMAR9A9S |
| Tire Size (F/R) | 80/100-21 51M / 100/90-19 57M |
| Tire Pressure | 1.0 bar (15 psi) [Front & Rear] |
| Battery Type | HY85S (Lithium-Ion) |
The Honda CRF 250 R, specifically the ME12 platform introduced for the 2022 model year, represents one of the most significant engineering overhauls in Honda’s motocross history. A unique engineering highlight of this generation is the return to a single-exhaust system, a move that contributed to a massive weight reduction of approximately 3.8 kilograms compared to the previous dual-exhaust generation. This change wasn’t just about weight; it fundamentally altered the power delivery, providing significantly more low-to-mid range torque, which had been a critique of earlier high-revving iterations.
Technical Review: Precision Engineering
The ME12A/R/24 series focuses on ‘Track Toughness.’ The chassis was borrowed largely from the CRF450R, featuring narrower main spars and optimized lateral rigidity to improve cornering accuracy. The engine utilizes a 249.4cc liquid-cooled single-cylinder DOHC layout, but with revised intake porting and a larger 4.1-liter airbox to ensure the engine breathes efficiently at high RPMs.
From a maintenance perspective, the CRF 250 R is a high-performance machine that requires meticulous attention. The use of the NGK SILMAR9A9S iridium spark plug is critical for maintaining the high-compression ignition timing required for competitive racing. Furthermore, the HY85S Lithium-Ion battery provides high cranking amps while keeping the center of gravity low, though it requires a dedicated lithium-compatible charger for off-season storage.
Maintenance Essentials
- Lubrication: Use only SAE 10W-30 oil meeting JASO T 903 MA standards. The system requires 1.08 liters. Frequent oil changes are the lifeblood of this high-revving DOHC valvetrain.
- Traction & Pressure: The factory-specified 1.0 bar (15 psi) is the baseline for standard motocross tracks. For sand or mud, riders may drop to 0.8 bar, but for technical hard-pack, maintaining the 1.0 bar ensures rim protection and sidewall stability.
- Electrical: Ensure the HY85S battery terminals are clean. Lithium batteries are sensitive to deep discharge; if the bike sits for more than two weeks, a voltage check is recommended.
Frequently Asked Questions (FAQ)
What is the oil capacity for the CRF 250 R (2022-2024)?
The engine requires 1.08 liters of SAE 10W-30 (JASO T 903 MA) oil.
Which spark plug does the ME12A model use?
The recommended spark plug is the NGK SILMAR9A9S, designed for high-performance thermal dissipation.
What is the standard tire pressure for track use?
Honda specifies 1.0 bar (15 psi) for both the 80/100-21 front and 100/90-19 rear tires.