Sportster – Engine & Gaskets

MCS Flywheel Thrust Washers, Steel (0.60" Thick) – 1936–1941 61" Knucklehead; 1948–1952 61"… For use with steel retainers; fits between connecting ...

MCS Flywheel Thrust Washers, Steel (0.55" Thick) – 1936–1941 61" Knucklehead; 1948–1952 61"… For use with steel retainers; fits between connecting ...

MCS Flywheel Thrust Washer Set, Steel (.055" Thick) – 1941–1948 74" (1200cc) Knucklehead… For use with steel retainers; fits between connecting rod...

MCS Flywheel Thrust Washer Set, Steel (0.72" Thick) – 1957–1971 XL Sportster For use with steel retainers; fits between connecting rods and flywhee...

MCS Lock Kit, Crank Pin – 54-E81 Big Twin Lock kit, crank pin Fitment 54-E81 Big Twin (NU) Product Details Brand: MCS Category: MOTOR PARTS >...

Jims 15-73 Tappet Adjusting Screw Kit – 1915-1973 45"; 74"; 80" Flatheads… 9/32-32 threaded. Fits as stock replacement and all other tappets that a...

Jims 57-85 Tappet Adjusting Screws – 1957–1985 XL Sportster with 9/32-32… With 5/16" ball-end. 9/32"-32 threaded. Fits JIMS; OEM 18508-52B and any ...

Jims 36-52 Chromoly Tappet Adjusting Screw Kit – 1936–1947 Knucklehead; 1948–1952… 4340 chromoly steel. With 3/8" ball end and 9/32"-32 threaded. O...

Jims 4340 Chromoly Steel Tappet Screws. Special – 1936–1952 Knuckle; Panhead and All… 4340 chromoly steel. Screw has oil hole drilled through the c...

Jims 29-85 Tappet Roller Repair Kit – 1929–1985 All H-D Complete reproduction tappet rollers with needle bearings and axles. Repl. 18534-29A. Tech ...

Jims 36-52 Crankpin. STD – 1936–1947 61" (1000cc) Knuckle… Standard O.D. 1.249". 1-hole design for stock flywheels. Use JIMS 978250 crankpin nuts a...

MCS 84-99 Tappet Block Set Front/Rear. Black – 1984–1999 Evo Big Twin Black painted cast aluminum lifter block set. OEM style. Repl. 18622-85B rear...

MCS 84-99 Tappet Block Set Front/Rear. Chrome – 1984–1999 Evo Big Twin Chrome plated cast aluminum lifter block set. OEM style. Repl. 18622-85B rea...

Colony Rocker Shaft Plug Set. Knuckle Style. Chrome – 66-E71 Shovelhead; 57-E71 XL Sportster Chrome plated. Styled after the Knucklehead rocker nut...

Colony Rocker Shaft End Plug Set. Knuckle Style. Chrome – 1971–1984 Shovelhead; 1971–1985 XL… Chrome plated. Knucklehead styled plugs. Complete set...

Colony Shovel Rocker Box Top Nut Kit. Chrome, Acorn – 1966–1984 Shovelhead Chrome plated. Includes 18 custom acorn nuts; washers and 4 rocker shaft...

Colony B.T. Ribbed Lower Pushrod Cover Set. Chrome – 1948–1965 Panhead; 66-E79 Shovelhead Chrome plated steel; custom ribbed; lower pushrod covers....

Colony Manifold Intake Seals. Plumber Style – 1940–1954 74"/61" OHV Big Twin… Brass seals. Used between manifold and cylinder head. OEM replacement...

MCS 57-85 Sportster Billet Tappet Block Set. Polished – 1957–1985 XL Sportster Billet aluminum. USA made. Replaces 18607-57B. Fitment 57-85 XL Spor...

Jims 57-85 Sportster Billet Tappet Block. Polished – 1957–1985 XL Sportster Polished. Precision machined from a 7075-T651 billet aluminum bar; whic...

MCS Twin Cam Rocker Cover Kit, Custom Style – 1999–2017 Twin Cam Chrome plated. Custom style 2-piece die-cast aluminum imported rocker box kit; inc...

Manley Valve Key Set (8) – 1936–1947 Knucklehead; 1948–1965… Stock style replacement. Heat treated; black oxided and 100% machined from a special c...

Manley Valve Spring Kit. Steel. Std to .550" Lift – 1984–1999 Evo Big Twin; 1999–2004 Twin… Steel top collars and a spring set. Can be used as a di...

Manley High Lift Valve Spring Kit. .500" to .650" Lift – 1966–1984 Shovelhead Includes titanium top collars; steel lower collars; valve springs and...