| Quick Specs: Honda CBR 250 R/RA (MC41) | |
|---|---|
| Production Years | 2011–2013 |
| Engine | 249cc Liquid-cooled Single-cylinder |
| Oil Specification | SAE 10W-30 API SG+ / JASO MA (1.5 L) |
| Spark Plug | NGK SIMR8A9 |
| Tire Sizes | F: 110/70-17 | R: 140/70-17 |
| Battery | YTX7L-BS |
The Honda CBR 250 R (MC41) represents a pivotal moment in Honda’s engineering history. While often compared to its multi-cylinder rivals, the MC41 was the first global sportbike to utilize a roller-rocker arm valve train in a DOHC engine. This design significantly reduced friction and improved fuel efficiency, marking it as a sophisticated entry-level machine rather than a budget-oriented compromise.
Technical Deep-Dive: The MC41 Powerplant
The heart of the MC41 is a liquid-cooled, 249cc single-cylinder engine featuring an offset cylinder design. This engineering choice reduces piston-to-wall friction during the power stroke. To maintain high-authority performance standards, owners must adhere strictly to the lubrication requirements. Use only 1.5 liters of SAE 10W-30 API SG or higher (JASO MA) when performing a filter change.
Maintenance Guide & Fluid Specifications
For optimal handling and safety, tire maintenance is critical. The MC41 utilizes a 110/70-17 front and a 140/70-17 rear. Pressure should be maintained at 2.0 bar (29 psi) for both front and rear when riding solo. If carrying a passenger, the rear pressure should be increased to 2.25 bar (33 psi).
Electrical reliability is anchored by the YTX7L-BS battery. Ignition is handled by the high-performance NGK SIMR8A9 iridium spark plug, which offers superior longevity and consistent firing under lean-burn conditions.
MotoSpecsLab Editorial Verdict
The Honda CBR 250 R/RA is a masterclass in functional minimalism. Its inclusion of an optional Combined ABS (C-ABS) system was revolutionary for the 250cc class in 2011. From a maintenance perspective, it is one of the most accessible and rewarding machines for the DIY mechanic, provided the specific Iridium plug and low-friction oil requirements are met.
Frequently Asked Questions
How often should I change the oil?
Honda recommends an oil change every 12,000 km (approx. 8,000 miles) or annually, though many enthusiasts prefer 6,000 km intervals for peak performance.
Can I use 10W-40 oil?
While 10W-40 can be used in warmer climates, Honda specifically engineered the MC41 for 10W-30 to maximize the efficiency of its internal friction-reduction technologies.