| Feature | Specification |
|---|---|
| Production Years | 2009–2014 (VNT70A) |
| Engine Type | 1,700cc Liquid-cooled, SOHC, 4-valve V-twin |
| Oil Specification | SAE 10W-40 (API SG-SM / JASO MA/MA2) |
| Oil Capacity | 4.3 Liters (with filter change) |
| Front Tire | 130/90B16 M/C 67H |
| Rear Tire | 170/70B16 M/C 75H |
| Battery | YTX20CH-BS |
| Spark Plug | NGK ILZKAR7B11 (Iridium) |
The Kawasaki VN 1700 Voyager represents a pivotal moment in Japanese cruiser engineering. It was the first Kawasaki V-twin tourer to integrate the Electronic Throttle Valve (ETV) system, a sophisticated drive-by-wire technology that allowed the ECU to control both fuel volume and air intake, resulting in a seamless throttle response and optimized fuel economy for long-distance cruising.
Engineering Analysis: The VNT70A Platform
At the heart of the VNT70A is a long-stroke, 1,700cc engine designed to deliver massive torque in the low-to-mid RPM range. Unlike its predecessor, the VN 1600, the 1700 series moved to a single overhead cam (SOHC) design and a 6-speed transmission with an overdrive gear, specifically engineered to reduce vibrations during transcontinental hauls.
The chassis features the K-ACT (Kawasaki Advanced Coactive-braking Technology) ABS, which links the front and rear brakes to ensure stable deceleration of this nearly 900-pound machine. This system was revolutionary for its time, providing a safety net that adjusts braking force based on the rider’s input and vehicle speed.
Maintenance Guide & Technical Requirements
Lubrication System
To maintain the hydraulic lash adjusters and the integrated wet clutch, MotoSpecsLab recommends using a high-quality synthetic 10W-40 oil meeting JASO MA2 standards. The total capacity for a standard oil and filter change is 4.3 Liters. Regular intervals should be strictly followed to prevent sludge buildup in the complex cooling passages.
Tires and Contact Patch
The Voyager’s stability is highly sensitive to tire pressure. We specify a front pressure of 1.93 bar (28 psi) and a rear pressure of 2.80 bar (41 psi). Given the weight of the VNT70A, using tires with the correct load index (67H Front / 75H Rear) is non-negotiable for safety and handling precision.
Electrical and Ignition
The ignition system utilizes NGK ILZKAR7B11 Iridium plugs. These are designed for longevity, but the deep-seated configuration in the V-twin heads requires careful torque application during replacement. The electrical demands of the audio system and cruise control are supported by a high-capacity YTX20CH-BS battery.
Summary
The Kawasaki VN 1700 Voyager (VNT70A) remains a benchmark for riders seeking a blend of traditional V-twin aesthetics and modern electronic rider aids. Proper adherence to the technical specifications outlined in this guide ensures the longevity and reliability of this sophisticated touring platform.