Skip to content
Find us Hours of Business Email Us Shipping Cookie policy Returns Terms & Conditions Privacy Policy Refunds

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.

Filters

Save 8% Save %
£44.63
£44.63 - £44.63
£44.63
£41.07
£41.07 - £41.07
£41.07

Manley Valve Spring Top Collar Set. Steel – 1936–1984 Big Twin

Only 2 left!

Manley Valve Spring Top Collar Set. Steel – 1936–1984 Big Twin OEM style replacement precision machined steel valve spring top collars. Note: Manle...

View full details
£44.63
£44.63 - £44.63
£44.63
£41.07
£41.07 - £41.07
£41.07
Save 8% Save %
Save 8% Save %
£35.63
£35.63 - £35.63
£35.63
£32.79
£32.79 - £32.79
£32.79

Manley Lower Valve Spring Collar Set. +.030" – 1980–1984 Shovelhead

Only 2 left!

Manley Lower Valve Spring Collar Set. +.030" – 1980–1984 Shovelhead Low profile for +.030" spring travel. Chromoly; black oxided. Precision re-engi...

View full details
£35.63
£35.63 - £35.63
£35.63
£32.79
£32.79 - £32.79
£32.79
Save 8% Save %
Sold out
£43.32
£43.32 - £43.32
£43.32
£39.87
£39.87 - £39.87
£39.87

Manley Lower Valve Spring Collar Set – 1984–1999 Evo Big Twin; 1999–2004 Twin…

Out of stock

Manley Lower Valve Spring Collar Set – 1984–1999 Evo Big Twin; 1999–2004 Twin… Chromoly; black oxided. Precision re-engineered to offer installatio...

View full details
£43.32
£43.32 - £43.32
£43.32
£39.87
£39.87 - £39.87
£39.87
Sold out
Save 8% Save %
£35.63
£35.63 - £35.63
£35.63
£32.79
£32.79 - £32.79
£32.79

Manley Lower Valve Spring Collar Set. +.030" – 1948–1979 Big Twin +.030" Spring Travel

Only 2 left!

Manley Lower Valve Spring Collar Set. +.030" – 1948–1979 Big Twin +.030" Spring Travel Low profile for +.030" spring travel. Chromoly; black oxided...

View full details
£35.63
£35.63 - £35.63
£35.63
£32.79
£32.79 - £32.79
£32.79
Save 8% Save %
Save 8% Save %
£36.69
£36.69 - £36.69
£36.69
£33.77
£33.77 - £33.77
£33.77

Manley Lower Valve Spring Collar Set – 1948–1965 Panhead; 1966–1979 Shovelhead

Only 2 left!

Manley Lower Valve Spring Collar Set – 1948–1965 Panhead; 1966–1979 Shovelhead Chromoly; black oxided finished. Precision re-engineered to offer in...

View full details
£36.69
£36.69 - £36.69
£36.69
£33.77
£33.77 - £33.77
£33.77
Save 8% Save %
Sold out
£56.70
£56.70 - £56.70
£56.70
£52.18
£52.18 - £52.18
£52.18

Gardner-Westcott Tappet Block Mount Kit. Acorn, Chrome – 36-E76 Big Twin. With L1976–1984 Style…

Out of stock

Gardner-Westcott Tappet Block Mount Kit. Acorn, Chrome – 36-E76 Big Twin. With L1976–1984 Style… Conversion kit. 1/4-24 threaded bolts. Used to fit...

View full details
£56.70
£56.70 - £56.70
£56.70
£52.18
£52.18 - £52.18
£52.18
Sold out
Sold out
£12.18
£12.18 - £12.18
£12.18
£11.20
£11.20 - £11.20
£11.20

Colony Hex Head Plug Oil Screen Crankcase – 1970–1980 Big Twin

Out of stock

Colony Hex Head Plug Oil Screen Crankcase – 1970–1980 Big Twin Chrome. Hex head plug. Fits oil screen. Fitment 70-80 Big Twin (NU) Product Details ...

View full details
£12.18
£12.18 - £12.18
£12.18
£11.20
£11.20 - £11.20
£11.20
Sold out
Save 14% Save %
£32.08
£32.08 - £32.08
£32.08
£27.68
£27.68 - £27.68
£27.68

Gardner-Westcott Cylinder Base Stud Set – 1930–1977 Big Twin

Only 3 left!

Gardner-Westcott Cylinder Base Stud Set – 1930–1977 Big Twin Includes 5x 7/16-14 to 7/16-20 x 2 1/2 stud; 8 needed Fitment 30-77 Big Twin (NU) Prod...

View full details
£32.08
£32.08 - £32.08
£32.08
£27.68
£27.68 - £27.68
£27.68
Save 14% Save %
Save 5% Save %
£74.88
£74.88 - £74.88
£74.88
£71.29
£71.29 - £71.29
£71.29

Gardner-Westcott Crankcase Bolt Kit, Allen – 2000–2017 Softail

Only 2 left!

Gardner-Westcott Crankcase Bolt Kit, Allen – 2000–2017 Softail Mounts crankcase halves together. Kits come complete with washers; studs and nuts wh...

View full details
£74.88
£74.88 - £74.88
£74.88
£71.29
£71.29 - £71.29
£71.29
Save 5% Save %
Save 5% Save %
£83.68
£83.68 - £83.68
£83.68
£79.67
£79.67 - £79.67
£79.67

Gardner-Westcott Crankcase Bolt Kit, Hex – 2000–2017 Softail

Only 2 left!

Gardner-Westcott Crankcase Bolt Kit, Hex – 2000–2017 Softail Mounts crankcase halves together. Kits come complete with washers; studs and nuts wher...

View full details
£83.68
£83.68 - £83.68
£83.68
£79.67
£79.67 - £79.67
£79.67
Save 5% Save %
Sold out
£62.55
£62.55 - £62.55
£62.55
£59.56
£59.56 - £59.56
£59.56

Gardner-Westcott Crankcase Bolt Kit, Hex – 1970–1978 Big Twin

Out of stock

Gardner-Westcott Crankcase Bolt Kit, Hex – 1970–1978 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts whe...

View full details
£62.55
£62.55 - £62.55
£62.55
£59.56
£59.56 - £59.56
£59.56
Sold out
Save 5% Save %
£90.36
£90.36 - £90.36
£90.36
£86.03
£86.03 - £86.03
£86.03

Gardner-Westcott Crankcase Bolt Kit, Acorn – 1970–1978 Big Twin

Only 1 left!

Gardner-Westcott Crankcase Bolt Kit, Acorn – 1970–1978 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts w...

View full details
£90.36
£90.36 - £90.36
£90.36
£86.03
£86.03 - £86.03
£86.03
Save 5% Save %
£5.57 - £5.57
£5.57
£6.03
£6.03 - £6.03
£6.03

Colony Early Style – 1936–1967 Big Twin OHV

Only 2 left!

Colony Early Style – 1936–1967 Big Twin OHV Parkerized; long shoulder nut; 1/4-24 thread Fitment 36-67 Big Twin OHV (NU) Product Details Brand: C...

View full details
£5.57 - £5.57
£5.57
£6.03
£6.03 - £6.03
£6.03
£7.73 - £7.73
£7.73
£8.37
£8.37 - £8.37
£8.37

Colony Early Style – 1936–1967 Big Twin OHV

Only 2 left!

Colony Early Style – 1936–1967 Big Twin OHV Chrome; 1/4"-24 thread; long shoulder nut Fitment 36-67 Big Twin OHV (NU) Product Details Brand: Colo...

View full details
£7.73 - £7.73
£7.73
£8.37
£8.37 - £8.37
£8.37
Save 8% Save %
£42.96
£42.96 - £42.96
£42.96
£39.54
£39.54 - £39.54
£39.54

Gardner-Westcott Cyl. Base Nut Kit, Acorn – 1952–1985 K; XL Sportster; 1929–1973 45"…

Only 3 left!

Gardner-Westcott Cyl. Base Nut Kit, Acorn – 1952–1985 K; XL Sportster; 1929–1973 45"… Chrome Fitment 52-85 K; XL Sportster; 29-73 45" SV (NU) Produ...

View full details
£42.96
£42.96 - £42.96
£42.96
£39.54
£39.54 - £39.54
£39.54
Save 8% Save %
Save 8% Save %
£27.08
£27.08 - £27.08
£27.08
£24.92
£24.92 - £24.92
£24.92

Gardner-Westcott Cyl. Base Nut Kit, Hex – 1936–1984 Big Twin

Only 3 left!

Gardner-Westcott Cyl. Base Nut Kit, Hex – 1936–1984 Big Twin Chrome Fitment 36-84 Big Twin (NU) Product Details Brand: Gardner-Westcott Category...

View full details
£27.08
£27.08 - £27.08
£27.08
£24.92
£24.92 - £24.92
£24.92
Save 8% Save %
Save 21% Save %
£9.98
£9.98 - £9.98
£9.98
£7.87
£7.87 - £7.87
£7.87

Gardner-Westcott Tappet Block Mount Kit. Slotted Tapered. Zinc – 30-E53 Big Twin; 1937–1973 45" Flathead

Only 1 left!

Gardner-Westcott Tappet Block Mount Kit. Slotted Tapered. Zinc – 30-E53 Big Twin; 1937–1973 45" Flathead 1/4-24 threaded. OEM style slotted tapered...

View full details
£9.98
£9.98 - £9.98
£9.98
£7.87
£7.87 - £7.87
£7.87
Save 21% Save %
Save 5% Save %
£106.44
£106.44 - £106.44
£106.44
£101.34
£101.34 - £101.34
£101.34

Gardner-Westcott Panhead Rocker Cover Screw Kit. Chrome Acorn. Long – 1948–1965 Panhead

Only 2 left!

Gardner-Westcott Panhead Rocker Cover Screw Kit. Chrome Acorn. Long – 1948–1965 Panhead Chrome plated. Custom Acorn bolt set. Used to mount rocker ...

View full details
£106.44
£106.44 - £106.44
£106.44
£101.34
£101.34 - £101.34
£101.34
Save 5% Save %
Save 8% Save %
£49.53
£49.53 - £49.53
£49.53
£45.59
£45.59 - £45.59
£45.59

Gardner-Westcott Cam Cover Screw Kit, Acorn – 1970–1999 Big Twin

Only 2 left!

Gardner-Westcott Cam Cover Screw Kit, Acorn – 1970–1999 Big Twin Cam cover screw kit, acorn Fitment 70-99 Big Twin (NU) (Excl. TC) Product Details ...

View full details
£49.53
£49.53 - £49.53
£49.53
£45.59
£45.59 - £45.59
£45.59
Save 8% Save %
Save 1% Save %
£119.53
£119.53 - £119.53
£119.53
£117.87
£117.87 - £117.87
£117.87

Gardner-Westcott Head Bolt Kit, Acorn – 57-E73 XL Sportster

Only 2 left!

Gardner-Westcott Head Bolt Kit, Acorn – 57-E73 XL Sportster Chrome; 900cc models; incl. washers Fitment 57-E73 XL Sportster (NU) Product Details ...

View full details
£119.53
£119.53 - £119.53
£119.53
£117.87
£117.87 - £117.87
£117.87
Save 1% Save %
Sold out
£12.72
£12.72 - £12.72
£12.72
£12.11
£12.11 - £12.11
£12.11

MCS Steel Breather Valve Spacers .130" – 50-E77 Big Twin

Out of stock

MCS Steel Breather Valve Spacers .130" – 50-E77 Big Twin Use with steel breather valves only. Small hole. Used to set correct end play. Note: Steel...

View full details
£12.72
£12.72 - £12.72
£12.72
£12.11
£12.11 - £12.11
£12.11
Sold out
Sold out
£10.38
£10.38 - £10.38
£10.38
£9.88
£9.88 - £9.88
£9.88

MCS Bushing, Idler Gear – 57-E84 XL Sportster

Out of stock

MCS Bushing, Idler Gear – 57-E84 XL Sportster 2 used Fitment 57-E84 XL Sportster (NU) Product Details Brand: MCS Category: MOTOR PARTS > CAM ...

View full details
£10.38
£10.38 - £10.38
£10.38
£9.88
£9.88 - £9.88
£9.88
Sold out
Save 5% Save %
£32.61
£32.61 - £32.61
£32.61
£31.05
£31.05 - £31.05
£31.05

MCS Camshaft Bushing, Outer. Std – 1957–1990 XL Sportster; L1959–1973 45"…

Only 3 left!

MCS Camshaft Bushing, Outer. Std – 1957–1990 XL Sportster; L1959–1973 45"… For #2 cam. Used in the cam cover. Tech tip: Cam cover bushings are coun...

View full details
£32.61
£32.61 - £32.61
£32.61
£31.05
£31.05 - £31.05
£31.05
Save 5% Save %
Save 5% Save %
£32.61
£32.61 - £32.61
£32.61
£31.05
£31.05 - £31.05
£31.05

MCS Camshaft Bushing, Inner. 36-57 OHV – 1936–1957 OHV FL

Only 3 left!

MCS Camshaft Bushing, Inner. 36-57 OHV – 1936–1957 OHV FL Camshaft bushing, inner. 36-57 OHV Fitment 36-57 OHV FL (NU) Product Details Brand: MCS...

View full details
£32.61
£32.61 - £32.61
£32.61
£31.05
£31.05 - £31.05
£31.05
Save 5% Save %

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare