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Dyna – Engine & Gaskets

Browse engine & gaskets selected for Harley-Davidson Dyna motorcycles. Available items span engine components and gaskets, seals and service parts, helping you compare parts intended for different jobs. Confirm model coverage, key measurements and any supporting parts required on the individual listing.

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£27.38
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Colony Oil Pump and Crankcase Plug Set – 1968–1980 Big Twin

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Colony Oil Pump and Crankcase Plug Set – 1968–1980 Big Twin Hex 3 plug set Fitment 68-80 Big Twin (NU) Product Details Brand: Colony Category: M...

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£27.38
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£27.05
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£27.05
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£24.97 - £24.97
£24.97
£28.76
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£28.76

Colony Oil Pump and Crankcase Plug Set – 1981–1999 Big Twin

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Colony Oil Pump and Crankcase Plug Set – 1981–1999 Big Twin Chrome; 3 plug set Fitment 81-99 Big Twin (Excl. TC) Product Details Brand: Colony C...

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£24.97 - £24.97
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£28.76
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£28.76
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£62.54
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£62.54
£57.55
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£57.55

Gardner-Westcott Head Bolt Kit, Hex. Chrome Stock Style – 1948–1984 Big Twin

Out of stock

Gardner-Westcott Head Bolt Kit, Hex. Chrome Stock Style – 1948–1984 Big Twin Incl. washers Fitment 48-84 Big Twin (NU) Product Details Brand: Gar...

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£62.54
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£62.54
£57.55
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£57.55
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£27.27 - £27.27
£27.27
£31.43
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£31.43

Colony Tappet Block Mount Kit. OEM Style, Chrome – L53-E76 Big Twin

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Colony Tappet Block Mount Kit. OEM Style, Chrome – L53-E76 Big Twin 1/4"-24 threaded. OEM reproduction tappet guide hardware of the hex head bolts ...

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£27.27 - £27.27
£27.27
£31.43
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£31.43
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£35.15
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£34.72
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£34.72

Colony High-torque – 1936–1984 Big Twin

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Colony High-torque – 1936–1984 Big Twin Chrome; no washers; provides extra space for big bore cylinders but fits stock bore equally well Fitment 36...

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£35.15
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£35.15
£34.72
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£48.00
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£43.62
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£43.62

Colony +.200" Stroker Upper Pushrod Cover Kit. Chrome – 1966–1984 Shovelhead; 1984–1999 Evo Big…

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Colony +.200" Stroker Upper Pushrod Cover Kit. Chrome – 1966–1984 Shovelhead; 1984–1999 Evo Big… 3-1/2" long; for +.200" longer stroker cylinders. ...

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£48.00
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£48.00
£43.62
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£43.62
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£35.88
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£35.45
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£35.45

Colony Rocker Shaft End Plug Set. Hex Style. Chrome – 1971–1984 Shovelhead; 1971–1985 XL…

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Colony Rocker Shaft End Plug Set. Hex Style. Chrome – 1971–1984 Shovelhead; 1971–1985 XL… Chrome plated. Custom Hex styled. Complete set to fit the...

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£35.88
£35.45
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£35.45
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£374.60
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£374.60
£369.39
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£369.39

Manley Race Master Valve Kit. Stock - .650" Valve Lift – 2005–2017 Twin Cam

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Manley Race Master Valve Kit. Stock - .650" Valve Lift – 2005–2017 Twin Cam Titanium top collars. Standard size replacement; installs without machi...

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£374.60
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£374.60
£369.39
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£369.39
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£244.72
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£241.32
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£241.32

Manley Valve Spring Kit. Titanium. Std to .650" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL…

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Manley Valve Spring Kit. Titanium. Std to .650" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL… Includes titanium top collars; steel lower; reverse wo...

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£244.72
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£244.72
£241.32
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£241.32
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£211.71
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£211.71
£208.76
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£208.76

Manley Valve Spring Kit. Steel. Std to .600" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL…

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Manley Valve Spring Kit. Steel. Std to .600" Lift – 2005–2017 Twin Cam A/B; 2004–2022 XL… Includes steel top collars; steel lowers; a beehive style...

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£211.71
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£211.71
£208.76
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£208.76
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£97.80
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£97.80
£93.12
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£93.12

Manley Severe Duty Stainless Valve, Intake. Oversize – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Manley Severe Duty Stainless Valve, Intake. Oversize – 1984–1999 Evo Big Twin; 1999–2004 Twin… Standard size replacement with oversized head. Dimen...

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£97.80
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£97.80
£93.12
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£93.12
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£97.80
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£97.80
£93.12
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Manley Severe Duty Stainless Valve, Intake. STD – 1984–1999 Evo Big Twin; 1999–2004 Twin…

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Manley Severe Duty Stainless Valve, Intake. STD – 1984–1999 Evo Big Twin; 1999–2004 Twin… Standard size replacement. Dimensions: 1.85" head dia. x ...

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£97.80
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£97.80
£93.12
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£93.12
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£364.90
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£359.82
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£359.82

Manley Race Master Valve Kit. .550" - .650" Valve Lift – 1984–1999 Evo Big Twin

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Manley Race Master Valve Kit. .550" - .650" Valve Lift – 1984–1999 Evo Big Twin Titanium top collars; high lift. Standard size replacement; install...

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£364.90
£364.90 - £364.90
£364.90
£359.82
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£359.82
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£54.57
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£54.57
£49.60
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£49.60

Colony Shovel Rocker Box Top Nut Kit. Chrome, Cap Style – 1966–1984 Shovelhead

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

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£54.57
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£54.57
£49.60
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£49.60
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£152.07
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£152.07
£149.94
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Jims Sprocket Shaft. 57-76 XL – 1957–1976 XL Sportster

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Jims Sprocket Shaft. 57-76 XL – 1957–1976 XL Sportster Fits with OEM flywheels. Sprocket shaft has keyway; use 23985-12 key (MCS 517945). Use nut (...

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£152.07
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£152.07
£149.94
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£68.10
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£68.10
£58.76
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£58.76

Gardner-Westcott Stud, Crankcase/Footrest – 1980–2003 XL Sportster

Out of stock

Gardner-Westcott Stud, Crankcase/Footrest – 1980–2003 XL Sportster 1 used; 1/2-13 to 1/2-13 x 3 1/2" Fitment 80-03 XL Sportster Product Details B...

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£68.10
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£68.10
£58.76
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£23.68
£26.53
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£26.53

MCS Driven Gear, Oil Pump. 25T – 1939–1972 Big Twin

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MCS Driven Gear, Oil Pump. 25T – 1939–1972 Big Twin Keyhole may be too small; may require modification needed before installation. key is 0.94 and ...

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£23.68 - £23.68
£23.68
£26.53
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£65.21
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£65.21
£59.69
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£59.69

Colony 45" Cylinder Head Stud Kit – 1929–1950 45" Flathead with Cast Iron…

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Colony 45" Cylinder Head Stud Kit – 1929–1950 45" Flathead with Cast Iron… Black parkerized. Reproduction studs with 3/8-16 threads. Accurately mac...

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£65.21
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£65.21
£59.69
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£59.69
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£13.72
£15.81
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£15.81

Colony Cam Cover Oil Passage Bolt. Chrome – 1963–1969 Big Twin

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Colony Cam Cover Oil Passage Bolt. Chrome – 1963–1969 Big Twin Compatible with stock cam covers. Fitment 63-69 Big Twin (NU) Product Details Bran...

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£13.72 - £13.72
£13.72
£15.81
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£15.81
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£44.08
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£44.08
£43.15
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£43.15

Colony Sprocket Shaft Oil Seal. Screw Type, STD – 1955–1968 Big Twin

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Colony Sprocket Shaft Oil Seal. Screw Type, STD – 1955–1968 Big Twin Standard thread size. Screw type bearing retainer nut. With seal. OEM replacem...

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£44.08
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£44.08
£43.15
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£43.15
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£7.82 - £7.82
£7.82
£8.46
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£8.46

Colony Head Bolt Washer Set – 1929–1973 45" SV

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Colony Head Bolt Washer Set – 1929–1973 45" SV Black parkerized; Fits models with cast iron cylinder heads Fitment 29-73 45" SV (NU) Product Detail...

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£8.46
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£11.63
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Colony Head Bolt Washer Set – 1936–1984 OHV Big Twin

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Colony Head Bolt Washer Set – 1936–1984 OHV Big Twin Chrome; for 7/16 headbolts Fitment 36-84 OHV Big Twin (NU) Product Details Brand: Colony Ca...

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£10.74 - £10.74
£10.74
£11.63
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£15.23
£17.55
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Colony Rocker Cover Washet Set. Chrome – L1954–1965 Panhead

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Colony Rocker Cover Washet Set. Chrome – L1954–1965 Panhead Chrome. Washers as used below the Panhead rocker cover screws. Use as required with lon...

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£15.23 - £15.23
£15.23
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£17.56
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Colony Nut Install Tool – 1911-1929 V-TWIN; 1930–1934 SINGLES…

Only 1 left!

Colony Nut Install Tool – 1911-1929 V-TWIN; 1930–1934 SINGLES… Used to install 989244 crankcase nuts. Fitment 1911-1929 V-TWIN; 30-34 SINGLES; 29-3...

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£15.24 - £15.24
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£17.56
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