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AF Clo5e Ratio Gearbox Spec Update
Two Group 6 race bikes managed to break their gear selectors while using AF Rayspeed Clo5e Ratio boxes at the Mallory race track in March. Both of the bikes concerned are in the 40-45bhp region and were on the track when the failures occurred.AF Rayspeed’s product testing had involved a season’s racing in a Group 6 engine (approx 35bhp) and a 4500mile hard road test in a 28bhp engine, plus several unusual event tests (slamming the bike into first gear at 50 and 80mph etc.)
Based on that experience, AF does not believe that fast road use in 30bhp engines would be likely to result in a failure (one of the Group 6 race riders is still running a Clo5e Ratio in his RB25 road bike and is 3000 miles in). Since then, AF has been working alongside the manufacturer to inspect the damaged gearbox from the race bikes. They have found the cause of the failure, assessed a number of design solutions and organised production of a replacement selector. Based on the
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