Velocette 6 Speed Gearbox

The Nova 6 speed gearset is designed to fit the standard Velocette type 10, 12, and 14 gear box shells.  Primarily conceived for racing use, though many of these gearsets have found homes in road going machines.  Especially in the higher reving 350 Viper, or those who use their machines for touring or riding two up. Please note that 5th and 6th gears are not overdrives.

All gears have 3 undercut engagement dogs with optimised backlash for fast changes and positive retention.  The gearset comes with both the mainshaft and layshaft fully assembled (excluding main bearings), three selector forks, a 5 speed cam plate, and actuating pawl.  The kit is also supplied with a sprocket of the customers choice in either 428 or 530 pitch.  See sprocket options at the bottom of the page.  Wear in an old front cover circlip groove can allow the mainshaft to move so as an additional safety measure an accurately machined collar is also supplied that prevents the circlip from jumping out.

The road version is supplied with a kickstart 1st layshaft gear which operates with the standard kickstart mechanism.

The race version comes with a plain 1st layshaft gear which cannot be used with the kickstart mechanism.  Therefore the race kit is supplied with a billet aluminium bearing carrier which replaces the standard kick start boss.

Part of the charm of these machines is that we have yet to see two Velocette cases exactly the same! Sleeve gear threads can sometimes differ as there are many pattern parts on offer. A compatible sleeve gear nut can be purchased at additional cost.

 

Gear Ratios >
1st 27 - 21 2.250:1
} 22.2%
} 17.4%
} 14.9%
} 10.5%
} 9.3%
2nd 24 - 24 1.750:1
3rd 19 - 23 1.446:1
4th 19 - 27 1.231:1
5th 17 - 27 1.1027:1
6th   1.000:1
 
Drive Ratio 16 - 28 1.750:1  
Overall reduction 1st - 6th 55.5%
A taller 1st gear pair is also available, which is 8.1% taller than the 1st ratio supplied as standard.
Alternate taller 1st ratio
1st : 22 - 26 = 2.068:1
Sprockets >
The following sprockets are available for the 6 speed gearbox:
  • Z17 : 530
  • Z18 : 530 & 428
  • Z19 : 530 & 428
  • Z20 : 530 & 428
  • Z21 : 530 & 428
  • Z22 : 530
  • Z23 : 530

Velocette 6 Speed Gearbox

Price : £1675.00

+VAT (if applicable) & Carriage

Availability:
From Velocettegearset.com

Contact:
Gerry on :
01707 270 683

or

07899 975 357