S&S Cycle

CRANKCASE BREATHER REED VALVE REPLACEMENT PARTS

1. Valve,Assembly,Breather Reed Engines with Stock Oil Pumps

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1999-'02 bt with stock or S&S Super Stock crankcases . . . . . . . . . . . . . . . . . . . . . . USA 31-2070 2003-'10 bt with stock or S&S Super Stock crankcases . . . . . . . . . . . . . . . . . . . . . USA 310-0742 S&S SA Crankcases. . . . . . . . . . . . . . . . . 310-0742 Engines with S&S gear oil pumps 2003-up bt w/stock crankcases and all S&S crankcases . . . . . . . . . . . . . . . . . . . . . . . 310-0742 2. O-ring 1999-'02 bt (-038),2.614" ID x 2.750" OD,Viton® . . 50-8154-S 2003-up bt (-036),2.364" ID x 2.500" OD,Viton®. . . 50-8155-S 3. Seal,Breather Reed Valve,1999-up bt. . . . . . . . . . 31-4086 4. Stop,Breather Reed Valve,Packaged,1984-up bt. . . . . . . . N/A 5. Reed,Breather Valve,bt (each) . . . . . . . . . . . . . . . . 31-2072-S 6. Screw,Torx BH,4-40 x 1/4",Black,Alloy Steel (each). . . . . 50-0305-S 7. Wave Spring ,2"OD X 1.6"ID X .375". . . . . . . . . . 50-8404 8. Spring Adaptor (for S&S SA Crankcases) (N/S) . . . . . 31-2103*

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*Required to accommodate the extra .375" case width of S&S Special Application big bore crankcases.

(N/S) = Not Shown

Mk45 4.5" MUFFLER REPLACEMENT PARTS 1. 4.5" Muffler Assembly

Left, Chrome . . . . . . . . . . . . . . . . . . . 551-0020 ± Right, Chrome. . . . . . . . . . . . . . . . . . . 551-0021 ± Left, Black . . . . . . . . . . . . . . . . . . . . . 551-0022 Right, Black. . . . . . . . . . . . . . . . . . . . 551-0023 2. Endcap Thruster, Chrome. . . . . . . . . . . . . . . . . 550-0634A ± Thruster, Highlighted Machined. . . . . . . . . . . 550-0629A Tracer, Chrome. . . . . . . . . . . . . . . . . . 550-0636A ± Tracer, Highlighted Machined. . . . . . . . . . . . 550-0632A 3. Main Baffle Assembly, 4.5" Muffler. . . . . . . . . . 551-0007 4. dB reducer. . . . . . . . . . . . . . . . . . . . . 551-0026 5. Insulation, 4.5" Muffler. . . . . . . . . . . . . . . 551-0003 6. Button Head Cap Screw, Stainless, "-20X3/8". . . . . . 500-0441 7. Hardware Kit, Muffler Clamps And Screws (N/S). . . . . 551-0027

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238 Order 608-627-1497 S&S Late Models 1999–up