K&S Carburetor Air Cut-Off Valve Set for Kawasaki Ninja 250R Motorcycle - Street
K&S Carburetor Air Cut-Off Valve Set for Kawasaki Ninja 250R Motorcycle - Street
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Description
Features
- Direct OEM-style replacement carburetor air cut-off valve set
- includes diaphram, spring and o-ring
- Located on the side of the carburetor, the air cut-off valve prevents lean fuel mixture (backfire) when decelerating
- Temperarily closes the pilot jet airway to providea richer mix as the throttle closes
- Sold in sets for one carburetor
Technical Specifications
- MFG. Part Number 56-1010
Vehicle Information
Kawasaki Ninja 250R Motorcycle - Street (1988-2012)
The Kawasaki Ninja 250R, an iconic entry-level sportbike, was produced from 1988 to 2012. Throughout its run, it featured a liquid-cooled parallel-twin engine, primarily with a displacement of 248cc or 249cc. This model was renowned for its accessibility and sporty performance, making it a popular choice for new riders and those seeking a lightweight, agile motorcycle. The Ninja 250R saw two distinct generations within this period. The first generation (1988-2007, internal codes EX250-F/G/H) featured a 248cc engine, with horsepower generally ranging from 37 to 45 hp. This era included a significant update in 1988, which refined the engine's responsiveness with carburetor and compression ratio adjustments, alongside a more enclosed bodywork. The second generation (2008-2012, internal codes EX250-J/R) brought a major redesign. While retaining about 30% of the previous engine components, the 249cc engine was retuned for better midrange performance, though peak horsepower was slightly lower (around 30-33 hp). This redesign also introduced all-new bodywork, 17-inch wheels, improved suspension, and larger brake rotors, making it visually align with Kawasaki's larger sportbikes. Q: How can I ensure parts fit my Ninja 250R?
A: To guarantee compatibility, please use the year and model selector at the top of this page. Q: My Ninja 250R is an EX250-F/J/R model. Does that change anything?
A: Internal codes like EX250-F or EX250-J denote generational or regional variations. Use the year selector to find parts specific to your motorcycle.
Maintenance
| Component | Interval | Details |
| Oil Change | Every 10,000 km or annually (1988-2007 models); Every 12,000 km or annually (2008-2012 models) | |
| Oil Filter | With every oil change (1988-2007 models); At every service interval (12,000 km or annually) (2008-2012 models) | |
| Drive Chain | Lubrication every 600 km (2008-2012 models). Check slack and lubricate more frequently in harsh conditions (all models) | The Ninja 250R uses a chain, not a belt. Lubricate more often if wet or dirty. |
| Spark Plugs | Approximately every 32,000 km (2008-2012 models, based on user reports). Not specified for 1988-2007 models. | |
| Air Filter | At each service interval (12,000 km) or at least every two years (2008-2012 models). Not specified for 1988-2007 models. | |
| Coolant | Replace regularly (2008-2012 models). Inspect level when engine is cold (all models). | Use 50% ethylene glycol pre-mix coolant with anti-corrosion inhibitors. |
| Valve Clearances | Check every 10,000 km (1988-2007 models); Every 12,000 km (2008-2012 models). | Many owners report that valves rarely need adjustment after initial services. |
| Brake Fluid | Replace regularly. |