Old Britts

Norton 650/750/850
Valve Spring Kit, Racing

By Percision Machine

The current price for this kit (part # 06-7070/B) is $176.00, as of 12/14/17.

The Norton high performance valve spring lit includes:

  • Four 7075-T6 hard anodized retainers
  • Four 15-deg. machined pairs of hard anodized 7075-T6 keepers
  • Four double racing valve springs
  • Four steel basewashers

Recommended installed height:

  • Installed height - 1.420"
  • Seat pressure for above installed - 105#
  • Open pressure for above installed - 195#
  • Max valve lift for above installed - .450"

This kit can be installed to except .520" valve lift @ recommended installed height of 1.300" which will produce a seat pressure of 140# and open pressure of 265# for racing applications.

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