| Parameter | Specification |
|---|---|
| Production Years | 2019 – Present |
| Engine Type | 773cc Vertical Twin, Bevel-gear Driven SOHC |
| Engine Oil | SAE 10W-40 (2.9 L with filter change) |
| Tires (Front/Rear) | 100/90-18 M/C 56H / 130/80-18 M/C 66H (Tube-type) |
| Battery | YTX12-BS |
| Spark Plug | NGK CR8E (Gap: 0.7–0.8 mm) |
The Kawasaki W 800 STREET (EJ800B) is more than a retro-styled motorcycle; it is a direct mechanical lineage to the 1966 Kawasaki W1. While most modern manufacturers utilize chain-driven or gear-driven internal camshafts, the W 800 retains its signature bevel-gear driven overhead camshaft. This unique engineering choice not only provides a distinct aesthetic but also offers a mechanical soundtrack and tactile feedback that is virtually extinct in the modern Euro 5 era.
Technical Engineering Overview
At the heart of the EJ800B is a long-stroke 773cc vertical twin engine. Unlike the more aggressive Z-series, the W 800 is tuned for torque, peaking at approximately 4,800 RPM. The 360-degree crankshaft configuration provides the classic ‘thump’ associated with British twins of the mid-20th century, while dual counterbalancers manage the secondary vibrations to ensure rider comfort during sustained cruising.
Maintenance Specifications & Fluid Capacities
Maintaining the W 800 STREET requires adherence to specific lubricant standards to protect the bevel-gear drive and the wet multi-plate clutch system.
- Engine Lubrication: Use 2.9 liters of high-quality SAE 10W-40 oil. Ensure the oil meets JASO MA2 standards to prevent clutch slippage.
- Ignition System: The NGK CR8E plugs are critical for efficient combustion. The gap must be precisely set between 0.7 mm and 0.8 mm.
- Electrical System: The EJ800B utilizes a YTX12-BS maintenance-free battery. Ensure terminals are kept clean and tightened to prevent ECU signaling errors.
Chassis, Tires, and Safety
The STREET variant features 18-inch wheels front and rear, providing a more neutral handling profile compared to the 19-inch front found on the ‘CAFE’ or ‘ORIGINAL’ models. Note that these are tube-type rims; therefore, roadside repairs require traditional patches or tube replacements.
Recommended Tire Pressures:
- Front: 2.00 bar (29 psi)
- Rear (Solo): 2.25 bar (33 psi)
- Rear (With Passenger/Load): 2.50 bar (36 psi)
MotoSpecsLab Verdict
The Kawasaki W 800 STREET (EJ800B) remains a standout for purists. Its maintenance is straightforward, lacking the complexity of liquid-cooling systems, yet it demands precision in its mechanical adjustments—particularly regarding the bevel-gear clearances and spoke tension. For the rider who values mechanical honesty and historical authenticity, the EJ800B is a benchmark in the modern classic category.