The RM-Z250 for 2006 is a four-stroke that's exceptionally easy starting hot or cold.

ENGINE FEATURES

• Compact 249cc, 4-stroke, liquid-cooled, DOHC, 4-valve engine - designed for easy-to-ride 4-stroke power
• Advanced 4-valve cylinder head design with narrow 25-degree included valve angle and titanium valves, plus straight exhaust ports and extended center rib for intake ports for strong low to mid range engine response
• Cam profiles selected for a wide powerband with strong peak power
• Composite-plated aluminum alloy cylinder for increased durability, optimum engine cooling and operating temperature
• Forged, 2-ring piston designed for maximum oil retention and minimal wear, plus tin-plating for added durability
• Keihin TM FCR37 carburetor with throttle position sensor and accelerator pump - throttle valve design and stainless-steel throttle cable are designed for low-friction throttle operation
• Strong, reinforced air box designed for durability and secure intake seal
• Automatic decompression system for easy kick starting
• Semi-dry-sump lubrication system features separate oil chambers for the transmission and crankshaft using the transmission as the oil sump, allowing low crankshaft placement, reduced engine height and a low center of gravity
• Large radiators for increased cooling capacity and more stable engine operating temperature
• AC-CDI ignition system with two ignition maps automatically increases engine idle speed to reduce engine brake effect - ignition timing and rev limiter set for optimum high rpm and over-rev performance
• Five-speed transmission featuring a ratchet-type shift mechanism designed for light shifting effort
• Magnesium cylinder head, generator and outer clutch covers minimize overall engine weight
• Lightweight exhaust system features a titanium and stainless steel construction, plus a repackable aluminum/stainless steel muffler

CHASSIS FEATURES

• Lightweight perimeter-type frame with thick-walled steering head for increased rigidity and improved handling performance, plus D-shaped upper spars that contribute to a slim design and improved position and rider mobility
• Slim bodywork allows greater freedom of movement for the rider
• Specially designed seat cover and seat foam material for better rider grip plus high comfort and durability
• Wide handlebar mounting position for increased handlebar strength and bending resistance
• Kayaba 48mm inverted, bladder-style front fork with low-friction fork oil seals and special valve system to optimize internal pressure and damping performance throughout the stroke
• Kayaba reservoir-type rear shock absorber with 16-way adjustable compression and rebound damping
• Rear linkage system places the suspension load on the swingarm instead of the frame to reduce frame weight, and allows smoother movement of the rear shock and linkage for improved rear wheel traction
• Aluminum swingarm with tapered hydro-formed beams, forged axle holder, plus cast and forged linkage components
• Front disc brake system consists of a dual-piston caliper with 27mm pistons, master cylinder with large 11mm piston and thin Kevlar brake line for reduced weight and progressive brake feel
• Lightweight rear brake system includes a dual piston caliper with 25.4mm pistons and durable forged brake pedal
• On-the-fly clutch lever adjuster mounted to the clutch lever perch for rider convenience
• Aluminum skid plate with plastic side guards and aluminum engine mounting plates