Complete Vega5 5-speed gearbox kit for all Lambretta J + Lui models. This is a plug 'n' play kit that can be fitted to any 3 or 4 speed J Range or Luna Line scooter.

For 4-speed Lui 75, Cometa, Vega and J125 Starstream models: Starstream J125 M4 or Lunamaster clutch basket LARGE HOLE type MUST be used!!

For 3-speed Lui 50, J50, Cento and J125 models, you will also require the following parts:
1 x 4-speed type gearbox endplate X815 
1 x 4-speed type layshaft M253 Luna Line models / M336 J Range models
1 x 4-speed Vega or Starstream type engine sidecasing
1 x 4-speed type gearbox selector arm (see pic) 1124
1 x gear linkage tie bar Code: L138
1 x special distance spacer for chain guide(s) X820
1 x special front sprocket drive collar sleeve X813 

The Vega5 5-speed gearbox kit consists of the following components:
5 x loose gear cogs
1 x cluster
1 x sliding dog gear selector
6 x large 1st. gear shims (from 0.8 - 1.8mm)


This is the complete list of all possible front drive sprocket & clutch crownwheel sprocket combinations for all J-Range and Lui-Vega-Cometa models, complete with the required length chain (with 'live' product links):

45T Clutch Crownwheel Sprocket
45T clutch sprocket + 11T front sprocket = 73 link chain
45T clutch sprocket + 12T front sprocket = NO! 
45T clutch sprocket + 13T front sprocket = 74 link chain
45T clutch sprocket + 14T front sprocket = 74 link chain
45T clutch sprocket + 15T front sprocket = 75 link chain
45T clutch sprocket + 16T front sprocket = 75 link chain

46T Clutch crownwheel sprocket
46T clutch sprocket + 11T front sprocket = NO!
45T clutch sprocket + 12T front sprocket = 74 link chain
46T clutch sprocket + 13T front sprocket = stretched 74 link chain
46T clutch sprocket + 14T front sprocket = 75 link chain
46T clutch sprocket + 15T front sprocket = 75 link chain
46T clutch sprocket + 16T front sprocket = 76 link chain

47T Clutch crownwheel sprocket
47T clutch sprocket + 11T front sprocket = 74 link chain
47T clutch sprocket + 12T front sprocket = stretched 74 link chain
47T clutch sprocket + 13T front sprocket = 75 link chain
47T clutch sprocket + 14T front sprocket = NO!
47T clutch sprocket + 15T front sprocket = NO!
47T clutch sprocket + 16T front sprocket = 76 link chain