| Also known as | 04.0358 |
| Listed in parts books | Not catalogued by year yet |
Norton CLUTCH SPRING (SINGLES & TWINS) x3(D2/399) 86LB
An 86LB rated clutch spring listed for singles and twins gearboxes, sold individually.
This is a clutch spring, part number 040358, listed for singles and twins gearbox applications. The catalog reference notes it's rated 86LB and shows up as one of a set of three in the D2/399 grouping. It's a mechanical part, not electrical, despite showing up under a Lucas-style number in some listings.
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Clutch springs like this one sit inside the clutch assembly and provide the clamping pressure that keeps the clutch plates engaged. Over time these springs lose tension, which shows up as a clutch that slips or doesn't fully engage under load.
We don't have much more detail on file for this one beyond the basic listing. If you're not sure this is the right spring for your gearbox, call the shop and we'll confirm fitment before you order.
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