- Quaife list a 5 speed cluster but refer you to P&M Motorcycles in Brentford, who know nothing about it and state they made one batch 30 years ago and haven’t done anything since. P&M mentioned talking to Nova.
- Burton Bike Bits
- Nova : 6 speed close ratio box, but at £2350.00 is probably beyond the budget for a 3 grand bike
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