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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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£68.60
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£65.31
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£65.31

MCS Rocker Arm, Front Intake – 1957–1985 XL Sportster

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MCS Rocker Arm, Front Intake – 1957–1985 XL Sportster Stock style replacement. Repl. 17396-57A. Fitment 57-85 XL Sportster (NU) Product Details B...

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£68.60
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£68.60
£65.31
£65.31 - £65.31
£65.31
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£69.72
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£69.72
£66.38
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£66.38

MCS Rocker Arm, Front Exhaust – 1957–1985 XL Sportster

Only 3 left!

MCS Rocker Arm, Front Exhaust – 1957–1985 XL Sportster Stock style replacement. Repl. 17394-57A. Fitment 57-85 XL Sportster (NU) Product Details ...

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£69.72
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£69.72
£66.38
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£66.38
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£56.58
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£56.58
£48.34
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£48.34

MCS Sprocket Shaft Extension, Std – L1970–1984 All Big Twin; 1984–1990…

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MCS Sprocket Shaft Extension, Std – L1970–1984 All Big Twin; 1984–1990… Sprocket shaft extension, std Fitment L70-84 all Big Twin; 84-90 Softail (N...

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£56.58
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£56.58
£48.34
£48.34 - £48.34
£48.34
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£20.02
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£20.02
£19.07
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£19.07

MCS Crankcase Tappet Oil Screen – 1970–1999 Big Twin

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MCS Crankcase Tappet Oil Screen – 1970–1999 Big Twin Installs in the crankcase; close to the oil pump; to pre-filter the oil before entering the hy...

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£20.02
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£20.02
£19.07
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£19.07
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£536.22 - £536.22
£536.22
£540.33
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£540.33

Paughco Panhead ''Sculpted'' D-rings. Polished – 1948–1965 Panhead

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Paughco Panhead ''Sculpted'' D-rings. Polished – 1948–1965 Panhead Polished. CNC machined billet aluminum D-Rings in a ''Sculpted'' custom design. ...

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£536.22
£540.33
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£540.33
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£207.32 - £207.32
£207.32
£208.91
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£208.91

Paughco ''Old STF'' Dual Rocker Box Oil Lines. Stainless – 1966–1984 Shovelhead

Out of stock

Paughco ''Old STF'' Dual Rocker Box Oil Lines. Stainless – 1966–1984 Shovelhead With stainless steel rocker oil lines. Special dual rockers lines a...

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£208.91
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£148.23
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£148.23

Paughco ''Old STF'' Dual Rocker Box Oil Lines. Brass – 1966–1984 Shovelhead

Out of stock

Paughco ''Old STF'' Dual Rocker Box Oil Lines. Brass – 1966–1984 Shovelhead With brass rocker oil lines. Special dual rockers lines are used to hel...

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£147.11 - £147.11
£147.11
£148.23
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£148.23
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£126.08
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£126.08
£116.23
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£116.23

Paughco 40-99 Pushrod Cover Retainer Set. Knurled Style – 1940–1947 74" Knuckle; 1966–1984 Shovel…

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Paughco 40-99 Pushrod Cover Retainer Set. Knurled Style – 1940–1947 74" Knuckle; 1966–1984 Shovel… Solid brass retainers in the knurled style by ''...

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£126.08
£116.23
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£116.23
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£87.04
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£87.04
£79.68
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Paughco 40-99 Pushrod Cover Retainer Set. 4-Hole Style – 1940–1947 74" Knuckle; 1966–1984 Shovel…

Out of stock

Paughco 40-99 Pushrod Cover Retainer Set. 4-Hole Style – 1940–1947 74" Knuckle; 1966–1984 Shovel… Solid brass retainers in the 4-hole style by ''Ol...

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£87.04
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£79.68
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£79.68
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£12.77 - £12.77
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£13.38
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£13.38

MCS Retainer Clip, Pushrod Cover. 86-90 XL – 1986–1990 4-Speed XL Sportster

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MCS Retainer Clip, Pushrod Cover. 86-90 XL – 1986–1990 4-Speed XL Sportster Chrome plated. OEM reproduction of the pushrod keeper. Repl. 17950-86. ...

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£12.77 - £12.77
£12.77
£13.38
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£13.38
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£205.46
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£205.46
£186.58
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£186.58

MCS 48-53 Generator Cam Cover for OEM Cases. 4-Ribs – 1948–1953 FL

Out of stock

MCS 48-53 Generator Cam Cover for OEM Cases. 4-Ribs – 1948–1953 FL 4-ribs. Replica cam cover; with bushings and breather pipe installed; in a stock...

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£205.46
£205.46 - £205.46
£205.46
£186.58
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£186.58
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£427.36 - £427.36
£427.36
£437.02
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£437.02

MCS 37-40 EL Generator Cam Cover. for OEM Cases – 1937–1940 EL 61" Knucklehead

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MCS 37-40 EL Generator Cam Cover. for OEM Cases – 1937–1940 EL 61" Knucklehead Smooth. Replica cam cover; with bushings and breather pipe installed...

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£427.36 - £427.36
£427.36
£437.02
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£437.02
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£10.46
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£10.46
£9.32
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£9.32

MCS Dual Inlet Crankcase Breather Filter. Chrome – Universal for Head Vented Models

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MCS Dual Inlet Crankcase Breather Filter. Chrome – Universal for Head Vented Models Fits head vented Big Twin and Sportster models. Enables you to ...

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£10.46
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£10.46
£9.32
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£9.32
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£47.14
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£47.14
£44.88
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£44.88

MCS Nut, Pinion/Sprocket Shaft – Pinion Shaft: 30-E81 Big Twin. Sprocket…

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MCS Nut, Pinion/Sprocket Shaft – Pinion Shaft: 30-E81 Big Twin. Sprocket… 3/4-18 threaded. Used on flywheel side. OEM replacement reference 24023-3...

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£47.14
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£47.14
£44.88
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£44.88
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£124.92
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£124.92
£124.07
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£124.07

MCS K Model Breather Valve, with Gear – 1952–1955 K; KH Models

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MCS K Model Breather Valve, with Gear – 1952–1955 K; KH Models OEM style replacement. USA made. Fitment 52-55 K; KH models (NU) Product Details B...

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£124.92
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£124.92
£124.07
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£124.07
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£18.18
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£17.31
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£17.31

MCS Thrust Washer Camshaft. .045" – 1936–1999 Big Twin

Only 1 left!

MCS Thrust Washer Camshaft. .045" – 1936–1999 Big Twin Shims used to achieve correct cam end-play. Approx. dimensions: 1.062" OD; .820" ID. Fitment...

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£18.18
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£18.18
£17.31
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£17.31
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£135.11
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£135.11
£126.88
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£126.88

MCS Rocker Cover, Lower. Chrome – 1992–1999 Evo Big Twin

Only 1 left!

MCS Rocker Cover, Lower. Chrome – 1992–1999 Evo Big Twin Chrome plated aluminum. OEM style replacement part for Evolution Big Twin rocker covers. F...

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£135.11
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£135.11
£126.88
£126.88 - £126.88
£126.88
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£36.35
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£36.35
£33.45
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£33.45

MCS Rocker Cover, Spacer. Chrome – 1992–1999 Evo Big Twin

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MCS Rocker Cover, Spacer. Chrome – 1992–1999 Evo Big Twin Chrome plated aluminum. OEM style replacement part for Evolution Big Twin rocker covers. ...

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£36.35
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£36.35
£33.45
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£33.45
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£56.07
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£56.07
£51.60
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£51.60

MCS Rocker Cover, Upper. Chrome – 1992–1999 Evo Big Twin

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MCS Rocker Cover, Upper. Chrome – 1992–1999 Evo Big Twin Chrome plated aluminum. OEM style replacement part for Evolution Big Twin rocker covers. F...

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£56.07
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£56.07
£51.60
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£51.60
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£156.44
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£156.44
£136.15
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£136.15

Daytona Oil Pump Assembly. 73-91 – 1973–1991 Big Twin

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Daytona Oil Pump Assembly. 73-91 – 1973–1991 Big Twin Polished aluminum. OEM style replacement. Fitment 73-91 Big Twin (NU) Product Details Brand...

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£156.44
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£156.44
£136.15
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£136.15
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£7.47
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£7.47
£6.88
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£6.88

S&S Roll Pin Timer Shaft Gear – 1937–1969 OHV Big Twin; 1952–1970 K; XL…

Only 4 left!

S&S Roll Pin Timer Shaft Gear – 1937–1969 OHV Big Twin; 1952–1970 K; XL… Used with S&S 531247; S&S 531248 and OEM 32531-36 circuit brea...

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£7.47
£6.88
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£6.88
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£12.72
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£12.72
£12.11
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£12.11

MCS Breather Valve Shim. .145" – L1977–1999 Big Twin

Out of stock

MCS Breather Valve Shim. .145" – L1977–1999 Big Twin Use with steel breather valves only. Large hole. Used to set correct end play. Note: Steel bre...

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£12.72
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£12.72
£12.11
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£12.11
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£12.72
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£12.72
£12.11
£12.11 - £12.11
£12.11

MCS Breather Valve Shim, .140" – L1977–1999 Big Twin

Only 2 left!

MCS Breather Valve Shim, .140" – L1977–1999 Big Twin Use with steel breather valves only. Large hole. Used to set correct end play. Note: Steel bre...

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£12.72
£12.72 - £12.72
£12.72
£12.11
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£12.11
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£711.38 - £711.38
£711.38
£727.47
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£727.47

MCS Sportster Oil Pump Assembly. 57-66 – 1957–1966 XL Sportster

Only 2 left!

MCS Sportster Oil Pump Assembly. 57-66 – 1957–1966 XL Sportster Stock style reproduction oil pump assembly. Replacement for OEM 26217-56 oil pump. ...

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£711.38 - £711.38
£711.38
£727.47
£727.47 - £727.47
£727.47

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