2005 Honda CR250R
Honda announced its’ 2005 CR two-strokes today, with both the CR125R and CR250R featuring some significant changes for the new model year. Below is Honda’s press info describing the changes for ’05.
2005 CR125R
New for 2005
- New crankcase intake tract and six-petal reed valve for more efficient air flow and improved drivability.
- New thicker reed plates for better off-idle response.
- Redesigned cylinder and cylinder head for improved power.
- New crankshaft design for improved performance.
- New piston features single keystone piston ring for improved sealing.
- Revised coolant flow for improved engine cooling and increased engine performance.
- Thicker radiator core (from 24mm to 28mm) improves cooling capacity to handle extra power.
- New RC valve changed from electrical to governor actuation for better sealing and improved power characteristics.
- New carb jetting specifications to match new engine characteristics.
- New shift fork shaft, shift forks and shift drum for improved shifting performance.
- ACG rotor weight increased to improve drivability.
- New KYB fork features new fork damper that separates air and oil for reduced contamination and more consistent fork action.
- New front axle placement for improved fork action and turning.
- New swingarm features a dual-axis, double-taper design with a large cast aluminum cross member that is lighter weight and stronger.
- New rear hub is stronger and lighter.
- New Honda Racing-inspired graphics.
2005 CR250R
New for 2005
- New cylinder design features RC exhaust valve housed in removable case for improved sealing and performance.
- New precision-cut stainless steel cylinder base gasket and revised port timing for improved bottom-end and mid-range power.
- New cylinder head combustion chamber shape for improved bottom-end and mid-range power.
- New one-piece exhaust valve for improved sealing.
- New piston dome shape for improved intake charge flow.
- New piston features single keystone piston ring for reduced friction and improved sealing.
- New crankshaft design for improved drivability.
- New crankcase with redesigned intake port for smoother air flow and increased journal thickness to decrease crank deflection.
- New six-petal reed valve with narrower profile for stronger bottom-end power.
- New reed valve mounting angle to improve charge flow and top-end power.
- New ECU mapping and RC valve control settings to match new engine power characteristics.
- New exhaust pipe shape has increased volume for improved low- to mid-range power.
- Thicker radiator core (from 24mm to 28mm) improves cooling capacity to handle extra power.
- New front axle placement for improved fork action and turning.
- New swingarm features a dual-axis, double-taper design with a large cast aluminum cross member that is lighter weight and stronger.
- New rear hub is stronger and lighter.
- New rear shock valving for improved bump absorption
- New Honda Racing-inspired graphics.
