| Component | Specification |
|---|---|
| Production Years | 2011–2016 |
| Engine Type | 773cc Air-cooled, 4-stroke Parallel Twin |
| Oil Specification | SAE 10W-40 (JASO MA/MA2) – 2.7 L |
| Tire Size (Front) | 100/90-19 M/C 57H |
| Tire Size (Rear) | 130/80-18 M/C 66H |
| Spark Plug | NGK CR8E (0.7–0.8 mm gap) |
| Battery | YTX12-BS |
Engineering Heritage: The Bevel-Gear Distinction
At MotoSpecsLab, we categorize the Kawasaki W 800 (EJ800A) not merely as a ‘retro’ motorcycle, but as a functional tribute to mechanical precision. The defining engineering highlight of the EJ800A is its bevel-gear driven overhead camshaft. While most modern twins utilize a timing chain, Kawasaki opted for a complex shaft-and-gear system. This design, visible on the right side of the cylinder head, ensures high-precision valve timing and eliminates the need for a cam chain tensioner, while providing the iconic mechanical ‘whir’ that enthusiasts crave.
Technical Maintenance Guide
1. Lubrication System
The EJ800A utilizes a wet sump system. To maintain the integrity of the bevel-gear drive and the integral gearbox, we recommend using a high-quality SAE 10W-40 oil that meets JASO MA/MA2 standards. Total capacity for an oil and filter change is 2.7 Liters. Given the air-cooled nature of this engine, thermal stability is paramount; avoid extended idling in high ambient temperatures.
2. Wheel and Tire Calibration
The W 800 retains classic wheel diameters (19-inch front, 18-inch rear) which are critical for its neutral handling characteristics. For optimal contact patch performance and tire longevity, adhere to the following pressures: Front: 2.0 bar (28 psi) and Rear: 2.25 bar (33 psi). The Special Edition often features anodized rims, which require non-acidic cleaners to prevent pitting.
3. Ignition and Electrical
The 773cc powerplant relies on NGK CR8E spark plugs. For peak combustion efficiency, the electrode gap must be precisely set between 0.7 and 0.8 mm. The electrical system is supported by a YTX12-BS battery; ensure terminal connections are free of oxidation, especially if the bike is stored in humid environments.
The Special Edition (EJ800A) Variance
The Special Edition variant is mechanically identical to the standard EJ800A but features distinct aesthetic treatments that affect long-term maintenance. These include blacked-out engine cases and exhaust systems. Owners should be aware that these matte finishes are more sensitive to abrasive chemicals than the standard chrome and polished alloy versions.
Frequently Asked Questions (FAQ)
What is the oil capacity for the W 800?
The Kawasaki W 800 EJ800A requires 2.7 liters of oil when changing the filter.
What are the factory tire pressures?
The recommended pressure is 2.0 bar (28 psi) for the front and 2.25 bar (33 psi) for the rear.
Which spark plug is compatible?
The engine uses NGK CR8E spark plugs with a gap of 0.7–0.8 mm.