XS650 Racer For Sale - $15,000
Rob McKie's Race Bike: A Masterpiece of Engineering
The Evolution of a Yamaha XS650 into a Racing Legend
Rob McKie’s racer is not just any motorcycle; it is a testament to the art of engineering and the relentless pursuit of speed. Based on the iconic Yamaha XS650, this racer has undergone extensive modifications to transform it into a formidable contender on the track. The result is a machine that is as captivating as it is powerful, embodying the spirit of competition and innovation.
The bike carrying number 114 is probably the final layout the bike is currently in and the final picture shows the owner Rob McKie with the bike in an earlier guise with the high pipes carrying the number 14.
Rob can be contacted for more information regarding the sale of this bike on 0407 546 594.
The Yamaha XS650: A Classic Foundation
The Yamaha XS650 is a motorcycle that has earned its place in the annals of motorcycling history. Originally introduced in 1968, the XS650 was known for its robust parallel-twin engine and reliable performance. However, in its stock form, it was never designed for the rigors of competitive racing. This is where Rob McKie’s vision and expertise come into play.
Rephasing the Crankshaft: Modern Thinking Applied to an Old Problem
One of the most significant modifications to McKie’s racer is the rephasing of the crankshaft by 90 degrees. This alteration is designed to make the engine fire like a 90 degree V-Twin. By rephasing the crankshaft, McKie has managed to improve the firing order, leading to smoother power delivery and better traction. This modification not only enhances performance but also imparts a unique character to the bike’s engine, reminiscent of the Ducati’s distinctive sound and feel. The reduction in vibration is a significant 45%
The Five-Axis Milled Head: A Nod to Harry Lillie
Another key innovation in McKie’s racer is the five-axis milled head. This component is a precise copy of a head developed by the legendary engineer Harry Lillie. Lillie, known for his contributions to motorcycle racing in the past, designed this head to compete against factory-built racers from renowned riders like Kenny Roberts. The five-axis milling process ensures that the head is machined to exacting standards, optimizing airflow and combustion efficiency. This modification plays a crucial role in unleashing the full potential of the engine, making it a force to be reckoned with on the track.
Beyond the Engine: Additional Modifications
While the engine modifications are the heart of McKie’s racer, other enhancements have been made to ensure the bike’s overall performance matches its powerplant. These include upgrades to the suspension, brakes, and chassis, all tailored to provide the best possible handling and stability. Each component has been carefully selected and fine-tuned to create a harmonious and competitive racing machine.
Suspension: Precision and Control
The suspension system of McKie’s racer has been overhauled to provide superior precision and control. High-performance forks fitted with Gold valves and shocks made by Ohlins have been installed to handle the demands of high-speed racing, ensuring that the bike remains stable and responsive under all conditions.
Brakes: Stopping Power
Racing demands exceptional braking performance, and McKie’s bike is equipped with top-of-the-line brake systems. Upgraded calipers and rotors as well as a matched master cylinder bore ratio for maximum efficiency to provide the necessary stopping power, allowing the rider to brake later and harder, a crucial advantage in competitive racing.
Chassis: Rigidity and Balance
The chassis of the XS650 has been reinforced and modified to improve rigidity and balance. Just one of these changes is the construction of a boxed swing arm longer than stock. These changes contribute to better handling and stability, enabling the bike to navigate corners with precision and maintain its line at high speeds.
Gearbox Modifications
First gear and main shaft have been made from scratch to optimise the ratios in the gearbox for racing so now first to second step is much closer than the original ratios.
Legacy and Impact
Rob McKie’s racer is more than just a machine; it is a tribute to the legacy of motorcycle racing and the spirit of innovation. By drawing inspiration from the past and integrating cutting-edge technology, McKie has created a bike that honours the history of the sport while pushing the boundaries of what is possible.
In the world of motorcycle racing, where every millisecond counts, the meticulous modifications and relentless pursuit of perfection embodied by Rob McKie’s racer, stand as a shining example of what can be achieved with passion, skill, and determination. This XS650 is not just a competitor on the track; it is a symbol of the enduring allure and excitement of Motorcycle racing.
