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Fintek Super Finishing Helps Motorcycle Racer Kieran Sangha Power Through the Gears for Top Performance

Much of our surface finishing work is on components that become part of other assemblies and we rarely get to see the difference they make. Fortunately, motorsport is one area that clearly demonstrates how achieving a surface super finish contributes to a race winning finish.

Sangha Race and Restoration, an experienced racing motorcycle rebuild company, turned to superfinishing at Fintek in the search for more engine performance – the ultimate goal of every race team and rider. Business owner, Kieran Sangha, set himself the challenge while rebuilding the engine of one of his own race bikes.

Kieran Sangha on the race track

“Simply refurbishing and renewing parts rarely give big performance gains,” explained Kieran who, when not transforming bikes for racing customers, enjoys the thrill of high speed competition himself. “Friction between components is an engine and gear killer. The heat build-up caused by the contact surfaces under constant stress from powering through the gears, while maintaining maximum revs, really dulls performance, potentially leading to component failure and not finishing the race – or worse, injury due to a mechanical fault.”

Kieran sought to overcome these problems by vibratory finishing gear, shafts and engine parts. The process did improve surface finish of the components, but they still showed roughness that was noticeably uneven across the surface. Also, chemicals used with the media in the vibratory machines could weaken the metal and hardened surfaces. Disappointingly, component life-span and bike performance remained unchanged by the vibratory finishing.

There had to be a better way and Kieran found it when he turned to extreme performance superfinishing at Fintek. Developments in this surface finishing technology means it is increasingly affordable to smaller teams and race engineers. Our newest extreme performance superfinishing techniques are capable of achieving surface smoothness values to Ra 0.01µm in a fraction of the time of traditional methods and with assured repeatable quality. The process also has the added benefit that it can eliminate stress fracturing risks.

Superfinishing racing motorcycle parts.

To meet Kieran’s performance target, we used a OTEC stream finishing system to create a unique process for his parts. Using a carefully balanced media size, angle of emersion in the media and cycle time, a surface smoothness of Ra 0.02µm was achieved quickly. The Fintek process does not use a corrosive rust inhibiting solution and therefore the risk of weakening the hardened metal surfaces is totally eliminated. Another bonus was that the parts emerged with a highly attractive polished mirror-like appearance. To the touch, an extreme smoothness extended evenly across all surfaces – especially at the root of the gears where other methods usually do not reach.

Motorcycle parts before and after surface finishing

Top left: before. Right and bottom left, parts after superfinishing

What did this mean for performance? Kieran explained, “Motorcycle racing is all about feel – an engine, gearbox and suspension might all work well – but you can instinctively tell there is a difference with extreme super finished components. In testing there was a considerable five percent performance increase. Yet, it is not just horsepower gains, it is how quickly the engine makes power and how it feels when it is under load revving freely. Notably, it runs cooler too. As a rider, confidence is critical – you can push it that little bit harder knowing that the components and engine are reliable, something overlooked by many of my customers.”

Fintek’s process also extended endurance of the components. Less friction means reduced wear and lower maintenance and servicing costs. “I will definitely be taking more parts to Fintek for the extreme performance finishing process. Sangha Race and Restoration has many clients racing competitively and I am sure they will want the same performance improvements,” Kieran concluded.