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Titanium collars kit for Norton Commando Mk1 Mk2 Mk3 (all years 750cc or 850cc)
Here are the weights specifications:
Description |
Standard item weight (steel) |
Titanium alloy 6AL4V weight |
Aluminium alloy 7075 weight |
valve top collar |
17.7 grams |
10.2 grams |
|
split cotters (2 pieces) |
2 grams |
1.1 gram |
|
adjusting screw locknut |
2.7 grams |
|
1.1 gram |
The kit includes 4 valve top collars, 8 split cotters and 4 adjusting screw locknuts.
The nut is made from aluminum alloy because it only locks the screw so is not stressed and it is lighter from titanium.
On the pictures you can see the weight of a standard set for 1 valve is 22.4gr and titanium-aluminum set is 12.4gr almost the half.
The thread of the locknut is 9/32 26” BSB, like the standard item.