New for the 2006 Honda CRF250R:
- New dual-muffler exhaust system centralizes mass and reduces
turning inertia to improve the lightweight feel of the bike.
- Dual-muffler exhaust system also increases low-rpm torque.
- New piston shape increases mid- and high-rpm power.
- New thinner piston ring for reduced engine friction.
- Cylinder head features new exhaust port shape for improved
power at high rpm.
- Intake valve seats incorporate a new material to improve valve
durability.
- New camshaft profile increases high-rpm power.
- New 40mm Keihin FCR carburetor increases high-rpm power.
- New ignition mapping works in conjunction with new cylinder
head and cam for improved power throughout the rev range.
- New front hub is lighter and stronger.
- New front fork outer tubes for lighter weight.
- Radiators are mounted 5mm lower for lower center of gravity
and improved weight feel.
- New swingarm construction for lighter weight.
- New front and rear suspension valving for improved bump absorption.
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