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Supermono
April 2008
We are continuing to develop a range of transmission parts for the 4 stroke motorcross engines being converted for use in supermono racing. Close ratio road race style 5 speed gear clusters have been produced for the CRF450 and YZF450 engines. Higher ratio primary gears for the CRF engine are now available.
A 6 speed gearbox for the CRF450 has successfully completed its first meeting, being placed 6th and 4th in the British Supermono Championship rounds at the Snetterton race track on 11th and 12th April.
Bridgestone 200
Close ratio conversion using some new and existing gears (No longer available) Replaced by 6 speed gear set £2000 + vat and carriage
Ratios Percentage Drop Standard ratio
Percentage Drop
1st 14 -32 2.286:1
) 27% 36.3%
2nd 18 -28 1.556:1
) 20.4% 25.7%
3rd 21 -26 1.238:1
) 11.9% 19.2%
4th 22 -24 1.091:1
) 8.3% 15.4%
5th 24 -24 1:1
Overall Reduction 1st -5th 56.2% 1st -5th 67.7%
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Primary Gears
A set of four gears with straight cut teeth includes a special shaft to mount a PVL ignition in place of the standard item. Mounts the original clutch sheet with cush drive retained rivets supplied.
Price £450 + vat & carriage
Nova Racing Transmissions Ltd 8 Horseshoe Yard Crowland PE6 0BJ UK
Tel: 01733 210082 Email: info@novaracing.com