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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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£248.73
£248.73 - £248.73
£248.73
£240.13
£240.13 - £240.13
£240.13

KB Performance Piston 1200cc B.T. Piston Kit. +.005" – 1941–1978 74"/1200cc Knuckle; Pan…

Only 2 left!

KB Performance Piston 1200cc B.T. Piston Kit. +.005" – 1941–1978 74"/1200cc Knuckle; Pan… Compatible with stock cylinders and heads; gives stock co...

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£248.73
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£248.73
£240.13
£240.13 - £240.13
£240.13
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£235.55
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£235.55
£227.40
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£227.40

KB Performance Piston 1200 XL Piston Kit. STD – 1988–2022 XL1200

Out of stock

KB Performance Piston 1200 XL Piston Kit. STD – 1988–2022 XL1200 Standard replacement piston set; for stock or high lift camshafts. With a lowered ...

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£235.55
£235.55 - £235.55
£235.55
£227.40
£227.40 - £227.40
£227.40
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£235.55
£235.55 - £235.55
£235.55
£227.40
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£227.40

KB Performance Piston 1200 XL Piston Kit. +.005" – 1988–2022 XL1200

Only 2 left!

KB Performance Piston 1200 XL Piston Kit. +.005" – 1988–2022 XL1200 Standard replacement piston set for stock applications. Stock 9.0:1 compression...

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£235.55
£235.55 - £235.55
£235.55
£227.40
£227.40 - £227.40
£227.40
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£255.33
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£255.33
£246.49
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£246.49

KB Performance Piston 883-1200 Big Bore Piston Kit. +.005" – 1986–2022 XL883 (883 to 1200 Conversion)

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KB Performance Piston 883-1200 Big Bore Piston Kit. +.005" – 1986–2022 XL883 (883 to 1200 Conversion) High compression. 883-1200 conversion piston ...

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£255.33
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£255.33
£246.49
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£246.49
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£20.88
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£20.88
£18.84
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£18.84

MCS Extensive Carb Rebuild Kit Keihin Butterfly – 1976–1989 Big Twin; 1976–1987 XL…

Only 3 left!

MCS Extensive Carb Rebuild Kit Keihin Butterfly – 1976–1989 Big Twin; 1976–1987 XL… Extensive rebuild kit for all OEM Keihin carburetor variations ...

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£20.88
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£20.88
£18.84
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£18.84
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£13.11
£15.11
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£15.11

Colony Oil Tank Mount Kit. Black – 1936–1957 Big Twin

Only 2 left!

Colony Oil Tank Mount Kit. Black – 1936–1957 Big Twin Black parkerized. Reproduction of the original hardware used to mount the oil tank to the OEM...

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£13.11 - £13.11
£13.11
£15.11
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£15.11
£19.56 - £19.56
£19.56
£22.54
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£22.54

Colony Oil Tank Mount Kit. Chrome – 1936–1957 Big Twin

Only 2 left!

Colony Oil Tank Mount Kit. Chrome – 1936–1957 Big Twin Chrome. Reproduction of the original hardware used to mount the oil tank to the OEM rigid fr...

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£19.56 - £19.56
£19.56
£22.54
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£22.54
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£18.68
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£18.68
£16.86
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£16.86

MCS OEM Style Exhaust Header Bracket 1-3/4". Chrome – 1984–1994 FXR; 1991–2011 Dyna; 2004–2013…

Only 1 left!

MCS OEM Style Exhaust Header Bracket 1-3/4". Chrome – 1984–1994 FXR; 1991–2011 Dyna; 2004–2013… Chrome plated steel. 1-3/4" (4.4cm) inside diameter...

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£18.68
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£18.68
£16.86
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£16.86
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£41.40
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£41.40
£40.90
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£40.90

Colony Upper & Lower Motor Mount Kit – 1957–1985 XL Sportster

Only 3 left!

Colony Upper & Lower Motor Mount Kit – 1957–1985 XL Sportster Zinc Fitment 57-85 XL Sportster (NU) Product Details Brand: Colony Category: M...

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£41.40
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£41.40
£40.90
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£40.90
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£11.19 - £11.19
£11.19
£12.11
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£12.11

Colony Upper Motor Mount Kit – 1932–1973 45" SV

Only 2 left!

Colony Upper Motor Mount Kit – 1932–1973 45" SV Zinc Fitment 32-73 45" SV (NU) Product Details Brand: Colony Category: MOTOR PARTS > MOTOR MO...

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£11.19 - £11.19
£11.19
£12.11
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£12.11
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£37.48
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£37.48
£37.02
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£37.02

Colony Inner Pushrod Cover Tubes. Zinc – L1979–1984 Shovelhead; 1984–1999 Evo Big…

Only 2 left!

Colony Inner Pushrod Cover Tubes. Zinc – L1979–1984 Shovelhead; 1984–1999 Evo Big… O-ring style. OEM style reproduction zinc plated inner (upper) p...

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£37.48
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£37.48
£37.02
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£37.02
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£35.12
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£35.12
£34.69
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£34.69

Colony Inner Pushrod Cover Tubes. Zinc – 48-E79 Big Twin; 54-E79 XL Sportster

Only 2 left!

Colony Inner Pushrod Cover Tubes. Zinc – 48-E79 Big Twin; 54-E79 XL Sportster OEM Cork seal style. OEM style reproduction zinc plated inner (upper)...

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£35.12
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£35.12
£34.69
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£34.69
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£17.12
£19.72
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£19.72

Colony Oil Tank Mount Kit. Zinc – 1936–1957 Big Twin

Only 2 left!

Colony Oil Tank Mount Kit. Zinc – 1936–1957 Big Twin Zinc plated. Reproduction of the original hardware used to mount the oil tank to the OEM rigid...

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£17.12 - £17.12
£17.12
£19.72
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£19.72
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£57.13
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£57.13
£52.30
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£52.30

Colony Rocker Cover Screw Kit – 1948–1965 PANHEAD

Only 2 left!

Colony Rocker Cover Screw Kit – 1948–1965 PANHEAD Cap style Fitment 48-65 PANHEAD (NU) Product Details Brand: Colony Category: MOTOR PARTS > ...

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£57.13
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£57.13
£52.30
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£52.30
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£53.75
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£53.75
£48.85
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£48.85

Colony Primary Cover Mount Kit – 1989–2006 Softail; 1991–2005 Dyna

Only 2 left!

Colony Primary Cover Mount Kit – 1989–2006 Softail; 1991–2005 Dyna Cap style Fitment 89-06 Softail; 91-05 Dyna (NU) Product Details Brand: Colony...

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£53.75
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£53.75
£48.85
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£48.85
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£47.19
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£47.19
£42.89
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£42.89

Colony Primary Cover Mount Kit. Cap Style – 1985–1994 FXR; 1985–1999 FLT/Touring

Only 2 left!

Colony Primary Cover Mount Kit. Cap Style – 1985–1994 FXR; 1985–1999 FLT/Touring Colony primary cover mount kit. Cap style Fitment 85-94 FXR; 85-99...

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£47.19
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£47.19
£42.89
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£42.89
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£46.69
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£46.69
£42.43
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£42.43

Colony Primary Cover Mount Kit. Cap Style – 1980–1984 FLT/Touring; 1982–1984 FXR

Only 2 left!

Colony Primary Cover Mount Kit. Cap Style – 1980–1984 FLT/Touring; 1982–1984 FXR Colony primary cover mount kit. Cap style Fitment 80-84 FLT/Tourin...

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£46.69
£46.69 - £46.69
£46.69
£42.43
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£42.43
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£22.21 - £22.21
£22.21
£25.59
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£25.59

Colony Primary Cover Mount Kit – 1965–1979 Big Twin with Accessory Type…

Only 2 left!

Colony Primary Cover Mount Kit – 1965–1979 Big Twin with Accessory Type… Cap style Fitment 65-79 Big Twin (NU) with accessory type pressed metal pr...

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£22.21 - £22.21
£22.21
£25.59
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£25.59
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£46.69
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£46.69
£42.43
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£42.43

Colony Primary Cover Mount Kit – 1970–1984 Big Twin (4-Speed )

Only 2 left!

Colony Primary Cover Mount Kit – 1970–1984 Big Twin (4-Speed ) Cap style Fitment 70-84 Big Twin (4-speed ) (NU) Product Details Brand: Colony Ca...

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£46.69
£46.69 - £46.69
£46.69
£42.43
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£42.43
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£35.36
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£35.36
£34.93
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£34.93

Colony Cap Style – 1965–1970 Big Twin

Out of stock

Colony Cap Style – 1965–1970 Big Twin Cast aluminum cover Fitment 65-70 Big Twin (NU) Product Details Brand: Colony Category: MOTOR PARTS > C...

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£35.36
£35.36 - £35.36
£35.36
£34.93
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£34.93
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£56.89
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£56.89
£51.71
£51.71 - £51.71
£51.71

Colony Primary Cover Mount Kit – 1936–1969 Big Twin

Out of stock

Colony Primary Cover Mount Kit – 1936–1969 Big Twin Cap nut style for tin cover; chrome Fitment 36-69 Big Twin (NU) Product Details Brand: Colony...

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£56.89
£56.89 - £56.89
£56.89
£51.71
£51.71 - £51.71
£51.71
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£57.95
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£57.95
£53.04
£53.04 - £53.04
£53.04

Colony Rocker Cover Screw Kit – 1948–1965 PANHEAD

Only 2 left!

Colony Rocker Cover Screw Kit – 1948–1965 PANHEAD Acorn Fitment 48-65 PANHEAD (NU) Product Details Brand: Colony Category: MOTOR PARTS > ROCK...

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£57.95
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£57.95
£53.04
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£53.04
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£47.26
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£47.26
£42.95
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£42.95

Colony Primary Cover Mount Kit – 2007–2016 FLT/Touring

Only 2 left!

Colony Primary Cover Mount Kit – 2007–2016 FLT/Touring Acorn Fitment 07-16 FLT/Touring (NU) Product Details Brand: Colony Category: MOTOR PARTS ...

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£47.26
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£47.26
£42.95
£42.95 - £42.95
£42.95
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£47.19
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£47.19
£42.89
£42.89 - £42.89
£42.89

Colony Primary Cover Mount Kit – 1999–2006 FLT/Touring

Only 2 left!

Colony Primary Cover Mount Kit – 1999–2006 FLT/Touring Acorn Fitment 99-06 FLT/Touring (NU) Product Details Brand: Colony Category: MOTOR PARTS ...

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£47.19
£47.19 - £47.19
£47.19
£42.89
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£42.89
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