| Specification | Data |
|---|---|
| Model / Generation | Yamaha Niken GT (MXT890) – RN841 |
| Production Years | 2023 – Present |
| Engine Type | 890cc CP3 Liquid-cooled, 3-cylinder |
| Oil Specification | Yamalube 4 (10W-40/15W-50) | JASO MA2 (2.8 L) |
| Tire Size (Front/Rear) | F: 120/70 R15 | R: 190/55 R17 |
| Tire Pressure (Cold) | F: 2.3 bar (33 psi) | R: 2.9 bar (42 psi) |
| Spark Plug | NGK CPR9EA-9 |
| Battery | YTZ10S |
Engineering Highlight: The Yamaha Niken GT RN841 is the only mass-production motorcycle to utilize a true Ackermann steering geometry in its front end. Unlike standard motorcycles, the Niken’s LMW (Leaning Multi-Wheel) system ensures that during a turn, the inner and outer front wheels follow different radii, significantly reducing tire scrub and maximizing mechanical grip under extreme lean angles.
Technical Overview: The RN841 Platform
The 2023 update (RN841) marks a significant shift for the Niken GT. By adopting the 890cc version of the CP3 engine, Yamaha has addressed the previous model’s torque curve requirements, providing a much-needed boost for touring with a passenger and luggage. The engine is tilted 5 degrees forward to accommodate the revised hybrid frame, which blends cast steel and aluminum sections for optimal rigidity.
Maintenance Guide & Essentials
Lubrication System
The MXT890 requires high-performance synthetic or semi-synthetic oil to protect the high-revving triple. The capacity is 2.8 liters for a standard oil and filter change. We recommend Yamalube 4 (10W-40) for temperate climates or 15W-50 for high-load touring in warmer regions. Ensure the oil meets JASO MA2 standards to prevent clutch slippage.
Chassis and Tires
The unique 15-inch front wheels require specific attention. Yamaha specifies 120/70 R15 M/C 56V tires for the front. Maintaining the correct pressure is critical for the LMW system’s feel; 2.3 bar (33 psi) in the front provides the necessary compliance for the dual-fork setup. The rear 190/55 R17 must be kept at 2.9 bar (42 psi) to handle the bike’s 270kg+ wet weight.
Electrical and Ignition
The RN841 utilizes the NGK CPR9EA-9 spark plug. Given the engine’s compact design, accessing the plugs requires removal of the fuel tank and airbox. The electrical system is supported by a YTZ10S battery, which should be kept on a tender during winter storage to support the bike’s complex IMU-based electronics and heated grips.
Editor’s Verdict
The Niken GT RN841 is not merely a motorcycle with an extra wheel; it is a masterclass in front-end stability. For the technical rider who prioritizes safety and cornering confidence over traditional aesthetics, the 890cc evolution provides the power and refinement that the original platform always deserved.