| Specification | Data |
|---|---|
| Model Year | 1987 |
| Engine Type | Liquid-cooled, 45° V-twin, 3-valve per cylinder |
| Engine Oil | SAE 10W-40 (JASO MA/MA2) (2.8 L) |
| Tires (Front/Rear) | 110/90-19 62H / 140/90-15 70H |
| Battery | YB14L-A2 |
| Spark Plug | NGK DPR8EA-9 (Gap: 0.8–0.9 mm) |
The 1987 Honda VT 750 C (RC29) stands as a pivotal moment in Honda’s cruiser history, specifically engineered with an offset dual-pin crankshaft. This design choice was not merely for performance but was a sophisticated engineering solution to eliminate the primary vibration inherent in 45-degree V-twins, allowing Honda to achieve a perfectly balanced engine without the need for heavy counter-balancers.
Technical Review: The RC29 Philosophy
As the successor to the earlier VT models, the RC29 was refined for better reliability and smoother power delivery. The liquid-cooled V-twin utilizes a SOHC configuration with three valves per cylinder (two intake, one exhaust) and dual spark plugs. This setup optimizes combustion efficiency and provides the broad torque curve that defined the Shadow series. The shaft drive system further emphasizes the low-maintenance, high-reliability ethos of this machine.
Maintenance Guide & Essentials
Lubrication System
For the RC29, oil quality is paramount due to the integrated gearbox and wet clutch. We recommend a high-quality SAE 10W-40 oil that meets JASO MA or MA2 specifications. The total capacity for an oil and filter change is 2.8 liters. Using non-JASO rated oils may lead to clutch slippage over time.
Ignition and Electrical
The RC29 utilizes a dual-plug ignition system for more complete combustion. Use NGK DPR8EA-9 plugs, ensuring the gap is precisely set between 0.8 and 0.9 mm. The electrical system is powered by a YB14L-A2 lead-acid battery; given the age of these machines, ensuring clean grounding points is essential to prevent charging system failures.
Chassis and Tires
The handling characteristics of the VT 750 C are heavily dependent on tire condition. The front 19-inch wheel provides stability, while the 15-inch rear delivers the classic cruiser aesthetic.
- Front: 110/90-19 62H (Pressure: 2.0 bar / 29 psi)
- Rear: 140/90-15 70H (Pressure: 2.0 bar / 29 psi solo, or 2.5 bar / 36 psi with passenger)
Maintaining these pressures is critical to prevent ‘cupping’ on the front tire and to ensure predictable cornering.
Editor’s Verdict
The Honda VT 750 C RC29 remains a testament to Honda’s ability to blend American cruiser style with Japanese precision engineering. For the modern collector or vintage rider, it offers a level of mechanical refinement that many contemporary cruisers still struggle to match. Regular maintenance of the cooling system and shaft drive oil will ensure this classic remains roadworthy for decades to come.