A complete, top spec and lightweight primary drive kit for your Norton twin, utilising the Commando diaphragm clutch.
Comprising 32T front pulley, 30mm wide quality 8mm pitch HTD drive belt, and our standard 68T lightweight drum. All wearing aluminium parts hard anodised as standard.
Front pulley is only available in 32T x 30 wide as standard. From time to time, other sizes & widths are made, but please check first by email. 30T & 36T are often available. (30T will increase the centre distance by about 3.5mm, 36T will reduce the centre distance by about 7mm).
Belt lengths offered are:
- 880mm = 235mm centres (Commando)
- 920mm = 255mm centres
- 960mm = 276mm centres (Most Dominators/650SS/Atlas)
- 976mm = 284mm centres
- 1000mm = 296mm centres
As standard the kit includes the standard 68T clutch drum & sealed bearing ONLY. You need the centre, plates, diaphragm spring & big circlip from a standard Commando clutch; these standard parts are not supplied. A 70T clutch drum can sometimes also be supplied, but please check first by email (this will reduce the centre distance by approx 4mm).
The option of a lightened drum (6 large holes in the back) is recommended, as it lets plate dust out which tends to accumulate at the back of the clutch and impair the release. Some people consider lightening unwise as it obviously reduces the strength of the basket, but unless you have over 90 bhp this is not considered a problem.