Upright Gearbox Clutch Worm Lever Arm and Bolt - Stainless Steel (Pair)

Product no.: 0418 A2/377+378

In stock

£29.00
Recommended Retail Price, plus delivery


This is a faithful reproduction of the Clutch Worm Lever Arm and the special 'reduced head' bolt that is fitted to all Norton upright gearbox's from early 1930's to 1950. It slides over the the eccentric worm spindle and can be adjusted then locked to maintain the correct tension of the clutch lever cable. Both the arm and the special reduced head bolt are faithful copies of the original Norton items, and if I say so myself look really nice quality.

The casting is a 'Lost Wax' casting, the patterns been copied from an original arm - lost wax giving a finer finish than a sand casting (but more expensive to reproduce). The reduced head bolt is also identical, and matched to the arm, including the shouldered face that matchs the coutersink in the arm. The only variation from original is that they are both manufactured in stainless steel, with the arm having a satin finish similar to an original. They are the finishing touch to a pre-war Norton gearbox restoration (and look great when also fitted with our stainless end nuts) - particularly as originals are now getting extremely hard to find.

The second photograph shows an original arm fitted to a Manx gearbox, so you can see that ours are identical! (note the same arm is also employed on the SOHC exhaust lifter, although Norton gave them a different reference number!).

These items are now getting very hard to find at autojumbles - and normally the hex on the bolt is chewed, as people use the wrong spanner.

Sorry they are not cheap, but the price reflects the cost of lost wax castings and CNC machining

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