S&S Cycle - S&S Performance Parts 2025 L - Volume 67

1936-'84

Phone: 608-627-1497

1 -2017-UP 2 -2007-'17 3 -1999-'06 4 -1984-'99 5 -1936-'84 6 -XL-RA1250 7 -BELTS & GASKETS 8 -TOOLS 9 -WARRANTY 10 -APPENDIX

.550" Lift Double Valve Spring Kit For 1948–’84 big twins with up to 550" lift

• Includes 4 inner springs, 4 outer springs, 4 aluminum top collars and late 1981–'85 bottom covers • Use with stock-style bottom collar, valve guides, valves with stock 3⁄8 " stem, and stock keepers • Compatible with thin-stem valves if thicker keepers (that maintain correct valve stem-top collar engagement) are used • Late single bottom collars are available for use in S&S cylinder heads for shovels and stock late 1981–’85 heads

90-2053

S&S® 550" Valve Springs Specifications—1948–’84 Big Twin Lift Installed Height

Seat Force

Force @ Max Lift

550"

1 500"

150 lb

343 lb

550 Lift Valve Spring Kit For 1948–'84 Panhead And Shovelhead Engines Description

Part #

For 1948–'84 Panhead and Shovelhead Engines Bottom Collar–Late 1981–’84 18222-81 (each)

90-2053 90-2038

Panhead engines usually require clearancing between rocker cover and top collar

.590" Lift Triple Valve Spring Kit For 1981–’84 big twins and S&S SH and P Series heads with up to 590" lift • Includes 4 steel top collars, 4 bottom collars, 4 each outer, middle, and inner springs, shims, and 8 keepers • Use with stock valve guides, stock valves with 3⁄8 " stem, and stock keepers • Compatible with thin-stem valves if thicker keepers (that maintain correct valve stem-top collar engagement) are used

S&S® .590" VALVE SPRINGS SPECIFICATIONS—1981–’84 BIG TWIN Lift Installed Height Seat Force

Force @ Max Lift

590"

1 480"

157 lb

356 lb

.590 LIFT VALVE SPRING KIT FOR–1981–’84 BIG TWIN Description

Part #

For Late 1981–’84 and All S&S Cylinder Heads

90-2063

590" spring kit is year-group specific because of different bottom collars supplied with early and late kits S&S heads require late 1981–’84 style kit, part #90-2063 When ordering replacement valve springs for S&S cylinder heads for shovelhead engines, order the 1981–’84 style part #90-2063

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