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Engine & Performance

Choose from Engine & Performance products for Harley-Davidson, American V-twin and compatible motorcycle applications. Across the range you will find products for engine components. Compatibility varies, so match the stated model, year and technical details before ordering.

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£62.36
£62.36 - £62.36
£62.36
£57.07
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£57.07

Colony Crankcase Bolt Kit – 1979–1995 Big Twin

Only 2 left!

Colony Crankcase Bolt Kit – 1979–1995 Big Twin Chrome hex Fitment 79-95 Big Twin (NU) Product Details Brand: Colony Category: MOTOR PARTS > C...

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£62.36
£62.36 - £62.36
£62.36
£57.07
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£57.07
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£61.55
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£61.55
£58.60
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£58.60

Gardner-Westcott Crankcase Bolt Kit, Hex – 1979–1995 Big Twin

Out of stock

Gardner-Westcott Crankcase Bolt Kit, Hex – 1979–1995 Big Twin Mounts crankcase halves together. Kits come complete with washers; studs and nuts whe...

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£61.55
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£61.55
£58.60
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£58.60
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£6.17
£6.67
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£6.67

Colony Oil Pump Mount Kit, OEM Style – 1937–1967 Big Twin

Only 2 left!

Colony Oil Pump Mount Kit, OEM Style – 1937–1967 Big Twin Black parkerized; nut & washers; special 1/4-24 HD thread Fitment 37-67 Big Twin (NU)...

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£6.17 - £6.17
£6.17
£6.67
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£6.67
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£7.14
£7.73
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£7.73

Colony Oil Pump Mounting Kit, OEM Style – 1937–1967 Big Twin

Only 2 left!

Colony Oil Pump Mounting Kit, OEM Style – 1937–1967 Big Twin Chrome nut & washer set; with special 1/4-24 hd thread Fitment 37-67 Big Twin (NU)...

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£7.14 - £7.14
£7.14
£7.73
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£22.60
£26.04
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£26.04

Colony Cyl Base Nut Kit – 1930–1978 Big Twin

Only 3 left!

Colony Cyl Base Nut Kit – 1930–1978 Big Twin Hex chrome Fitment 30-78 Big Twin (NU) Product Details Brand: Colony Category: MOTOR PARTS > CYL...

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£22.60 - £22.60
£22.60
£26.04
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£26.04
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£20.95
£24.15
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£24.15

Colony Tappet Block Mount Kit. OEM Style, Chrome – 36-E53 Big Twin; 1937–1973 45" Flathead

Only 2 left!

Colony Tappet Block Mount Kit. OEM Style, Chrome – 36-E53 Big Twin; 1937–1973 45" Flathead 1/4"-24 threaded. OEM reproduction tappet guide hardware...

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£20.95 - £20.95
£20.95
£24.15
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£24.15
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£28.10
£35.44
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£35.44

Colony Cyl Base Nut Kit – 1978–1984 Big Twin

Only 2 left!

Colony Cyl Base Nut Kit – 1978–1984 Big Twin Chrome; acorn milled hex; with o washers Fitment 78-84 Big Twin (NU) Product Details Brand: Colony ...

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£28.10 - £28.10
£28.10
£35.44
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£35.44
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£25.79
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£25.79
£25.24
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£25.24

Colony 40-49 Fuel Valve Conversion Kit – 1940–1949 FL

Only 2 left!

Colony 40-49 Fuel Valve Conversion Kit – 1940–1949 FL Chrome plated. Conversion kit with fittings for the stock fuel valve (shut off assembly) on e...

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£25.79
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£25.79
£25.24
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£25.24
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£25.79
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£25.79
£25.24
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£25.24

Colony 50-56 Fuel Valve Conversion Kit – 1950–1965 FL

Only 3 left!

Colony 50-56 Fuel Valve Conversion Kit – 1950–1965 FL Chrome. Conversion kit with fittings for the stock fuel valve (shut off assembly) on early du...

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£25.79
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£25.79
£25.24
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£35.01
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£34.59

Colony High-torque – 1952–1985 K; XL Sportster; 45" Flatheads

Only 2 left!

Colony High-torque – 1952–1985 K; XL Sportster; 45" Flatheads Chrome Fitment 52-85 K; XL Sportster; 45" Flatheads (NU) Product Details Brand: Col...

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£35.01
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£34.59
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£32.57
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£32.57
£30.24
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£30.24

MCS Upper Pushrod Cover Kit. Pan & XL – 1948–1965 Panhead; 57-E79 XL Sportster

Only 3 left!

MCS Upper Pushrod Cover Kit. Pan & XL – 1948–1965 Panhead; 57-E79 XL Sportster Chrome plated. OEM style reproduction; clip type; upper pushrod ...

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£32.57
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£32.57
£30.24
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£30.24
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£31.77
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£31.32
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£31.32

James Gaskets Sprocket Shaft Oil Seal Kit – 1940–1954 Big Twin OHV & Flathead

Only 2 left!

James Gaskets Sprocket Shaft Oil Seal Kit – 1940–1954 Big Twin OHV & Flathead Includes oil seal and bearing shim. OEM replacement reference 247...

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£31.77
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£31.77
£31.32
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£31.32
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£23.24
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£23.24
£22.74
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£22.74

Colony Sprocket Shaft Oil Seal – 1940–1954 Big Twin

Only 3 left!

Colony Sprocket Shaft Oil Seal – 1940–1954 Big Twin Includes snap ring. OEM replacement reference 24776-40 (early 241-40). Fitment 40-54 Big Twin (...

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£23.24
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£23.24
£22.74
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£22.74
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£9.45
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£9.45
£8.69
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£8.69

Colony Linkert Fuel Line Adapter Fitting. Chrome – 1933–1965 All H-D

Only 3 left!

Colony Linkert Fuel Line Adapter Fitting. Chrome – 1933–1965 All H-D Chrome plated. Allows connecting a regular 1/4" I.D. rubber hose to the Linker...

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£9.45
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£9.45
£8.69
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£8.69
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£16.84
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£16.84
£16.47
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£16.47

Colony Oil Line Fitting Set. Chrome – 1936-1964 OHV & Flathead Big Twin: Oil…

Only 3 left!

Colony Oil Line Fitting Set. Chrome – 1936-1964 OHV & Flathead Big Twin: Oil… Reproduction of the early style oil line / oil nipples and vent l...

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£16.84
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£16.84
£16.47
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£16.47
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£43.46
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£43.46
£43.24
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£43.24

Paughco Muffler P-clamp 1-7/8" Chrome – Universal

Out of stock

Paughco Muffler P-clamp 1-7/8" Chrome – Universal Chrome plated universal P-clamp; made from steel; with an 1-7/8" (4.8 cm) inside diameter. Offset...

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£43.46
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£43.46
£43.24
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£43.24
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£47.05
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£47.05
£46.39
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£46.39

Jims Camshaft Bushing. Undersize. 70-99 B.T – 1970–1990 Big Twin

Only 2 left!

Jims Camshaft Bushing. Undersize. 70-99 B.T – 1970–1990 Big Twin With a smaller I.D. of .9875" (standard is 1.000") with a standard 1.2015" O.D. Us...

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£47.05
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£47.05
£46.39
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£46.39
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£72.45
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£72.45
£56.84
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£56.84

All Balls HSR 48 Carburetor Jet Kit

in stock

Includes a range of main, pilot, and accelerator pump jets

£72.45
£72.45 - £72.45
£72.45
£56.84
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£56.84
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£41.13
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£41.13
£40.55
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£40.55

Jims Camshaft Bushing. +.005". 70-99 B.T – 1970–1999 Big Twin

Only 2 left!

Jims Camshaft Bushing. +.005". 70-99 B.T – 1970–1999 Big Twin Standard O.D. is 1.2015". Standard I.D. is 1.000". Machined from solid bronze bar. Ea...

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£41.13
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£41.13
£40.55
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£40.55
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£41.13
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£41.13
£40.55
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Jims Camshaft Bushing. Std. 70-99 B.T – 1970–1999 Big Twin

Only 3 left!

Jims Camshaft Bushing. Std. 70-99 B.T – 1970–1999 Big Twin Standard 1.000" ID; 1.2015" OD. Machined from solid bronze bar. Each bushing is machined...

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£41.13
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£41.13
£40.55
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£40.55
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£274.29
£274.29 - £274.29
£274.29
£270.47
£270.47 - £270.47
£270.47

MCS Connecting Rod Assembly 41-73 B.T – 1941–1966 74" (1200cc) Panhead…

Only 3 left!

MCS Connecting Rod Assembly 41-73 B.T – 1941–1966 74" (1200cc) Panhead… Complete kit. Includes crankpin; crankpin nuts; rod rollers and retainers. ...

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£274.29
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£274.29
£270.47
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£270.47
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£38.56
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£38.56
£38.01
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£38.01

Jims Camshaft Bushing, Outer. STD. 36-69 OHV – 1936–1965 Knuckle/Panhead; 1966–1969…

Only 3 left!

Jims Camshaft Bushing, Outer. STD. 36-69 OHV – 1936–1965 Knuckle/Panhead; 1966–1969… 1.0035" outside diameter. Cam cover bushing. Machined from sol...

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£38.56
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£38.56
£38.01
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£105.13
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£105.13
£103.65
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£103.65

Jims Connecting Rod Race Set – 1941–1999 Big Twin

Only 1 left!

Jims Connecting Rod Race Set – 1941–1999 Big Twin Made from 52100 aerospace quality Timken® bearing stock. OEM reproduction for rear female 24345-3...

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£105.13
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£105.13
£103.65
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£103.65
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£51.12
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James Gaskets Gasket Set for Billet S&S Rocker Covers – 1984–1999 Evo Big Twin; S&S V-series…

Only 3 left!

James Gaskets Gasket Set for Billet S&S Rocker Covers – 1984–1999 Evo Big Twin; S&S V-series… Compatible with S&S billet rocker covers ...

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£50.73 - £50.73
£50.73
£51.12
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