Honda CBR250R Specs and Engine Technical Features
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The Honda CBR250 is equipped with a water cooled inline 4 cylinder engine. The engine is inclined forward 35°. This inclination enables an improved straight intake manifold port, which allows smooth flow of air-fuel mixture gas. The gear drive system was applied to the cam shaft instead of chain drive system. The gear system is optimized for high speed operation. In order to provide smooth valve operation at high speed, the engine has lower shim design. Also, carbon hardened connecting rods used to reduce friction loss.
The following table outlines detail information about Honda CBR250R Specs, including engine specs, transmission specs, fuel system, steering, brake system, etc.
Honda CBR250R Dimension Specs
| Overall length | 2,000 mm |
| Overall width | 685 mm |
| Overall height | 1,120 mm |
| Wheel-base | 1,370 mm |
Honda CBR250R Engine Specs
| Total displacement | 0.249 litres |
| Engine type | Petrol 4 stroke |
| Cylinders | 2 abreast |
| Engine configuration | Inline 4 cylinder |
| Valve operation | DOHC |
| Bore x stroke | 48.5 mm x 33.8 mm |
| Compression ratio | 11.0 |
| Compression pressure | 13.0 kg/cm2 at 400 rpm |
| Maximum output | 45 PS at 14,500 rpm |
| Maximum torque | 2.5 kg-m at 10,500 rpm |
| Valve operation time: Intake open Valve close Exhaust open Valve close |
. 10° BTDC (1mm lifted) 40° ABDC (1mm lifted) 30° BBDC (1mm lifted) 10° BTDC (1mm lifted) |
| Valve clearance in | 0.16 mm (cold) |
| Valve clearance out | 0.23 mm (cold) |
| Idle speed | 1,500 rpm |
| Lubrication | Forced pressure |
| Oil filter | Total flow |
| Oil pump | Trochoid rotor |
| Oil capacity | 2.7 liter |
| Cooling system | Liquid cooled |
Honda CBR250R Fuel System Specs
| Air filter type | Viscous paper |
| Fuel capacity | 14.0 liter |
| Carburetor type | VG01 |
| Carburetor piston size | 28 mm |
| Venturi diameter | 25 mm |
| Ignition timing | 20° BTDC at 1,500 rpm |
| Spark plug | NGk C8EH 9/ ND U24FE 9 |
| Spark plug gap | 0.8 – 0.9 mm |
| Battery | 12V 8AH |
| Clutch type | Multi – wet plate |
| Clutch operation | Mechanical |
Honda CBR250R Transmission System Specs
| Transmission type | Constant mesh |
| Primary reduction ratio | 2.966 |
| Gear ratio: 1st 2nd 3rd 4th 5th 6th |
. 2.733 2.000 1.590 1.333 1.153 1,035 |
| Gear type | Chain |
| Gear reduction ratio | 3.071 |
| Front brake | Hydraulic disc |
| Rear brake | Hydraulic disc |
| Front wheel suspension | Telescopic fork |
| Rear wheel suspension | Swing arm diamond |
Source: Honda CBR250R Workshop Manual
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Tags: Engine, Fuel System, Motosport, Transmission
