The rule book item 5.2.7.8.12 states that:- That the material and heat treatment of the highest 2 gear pinions may be changed, but the number of teeth has to be kept as homologated. At present the teams, even though the rule appears to have been written to allow aftermarket parts, are not prepared to risk using them due to the strict policing and the fear of being disqualified from the competition. Nova want to be able to support the teams by providing cost effective solutions to their transmission problems and the rule on the gear items needs some clarification. Changes to such components as forks, brakes, clutch packs, tyres etc are well controlled and documented and enable the standard OEM machine, to be safely used in competition.
The current MCRCB rules for production based racing are well thought out and provide a very good basis to minimize the cost and to equalize the track performance of current production motorcycles. Nova have been asked for advice by a number of teams and riders who have been experiencing gearbox problems when racing their motorcycles in the British Superstock series. It is suggested that the existing ‘British Superstock’ rule be clarified to allow the use of aftermarket parts having the same teeth numbers as the standard parts but that they must not be lighter and should be made using conventional heat treated gear steel The supply of spare or uprated parts may also be difficult for the manufacturer of the motorcycle, and hence there exists a need for an alternative source of supply. These replacement parts would not give any benefits in relation to engine performance, the benefit is primarily the reduction in missed gear shifts and false neutrals that occur when the stock OEM items become worn, and the reduction in replacement and rebuild costs. This note looks at why the use of standard OEM parts can give rise to operational and safety issues, and shows that these can be reduced by the use of aftermarket parts.
The 2014 MCRCB Yearbook specifies what can be done to certain individual components but does not fully address the concerns of team owners. However, there is some doubt as to the legality of the use of these in the British series. These are used by riders and teams around the world who wish to have better life and safety than that offered by the OEM parts. Nova Racing Transmissions Ltd specialises in the design and manufacture of motorcycle gearboxes and have produced standard specification racing gear sets.
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