I found a Sportster engine for sale. What are the first things I should check or replace?

When starting with a used engine of unknown history, it's wise to at least perform a top-end refresh. This typically includes new gaskets, checking cylinder and piston tolerances, and inspecting the valve train. This gives you peace of mind and a reliable starting point.

What are the easiest ways to get more power from my stock Sportster engine?

The most common and effective "Stage 1" upgrades are improving airflow. This means installing a high-flow air cleaner and a less restrictive exhaust system. These two changes allow the engine to breathe more freely and will deliver a noticeable performance gain without ever opening up the motor itself.

I'm rebuilding my engine. How important is it to replace all the hardware?

While not always strictly necessary, it's highly recommended. Engine hardware is subject to countless heat cycles and stress, which can cause it to stretch and weaken over time. Using new, high-quality head bolts, case bolts, and other hardware ensures proper torque specs and a leak-free, reliable engine for years to come.

Special Motorcycle Engine

Sort by

Colony #1026 Complete Show Bike Kit Allen Hardware 2009-Up Harley-Davidson FLT - Chrome Plated
$200.45

Colony #1014 Complete Show Bike Kit Knurled Allen Hardware 1991-1993 Harley-Davidson Sportster - Chrome Plated
$166.28

Colony #1013 Complete Show Bike Kit Allen Knurled Hardware 1994-2003 Harley-Davidson Sportster - Chrome Plated
1 review $166.28

Colony #1021 Complete Show Bike Kit Knurled Allen Hardware 2002-Up Harley-Davidson VRSCA - Chrome Plated
$112.28

Colony #1014-P Complete Show Bike Kit Smooth Allen Hardware 1991-1993 Harley-Davidson Sportster - Chrome Plated
$196.13

Colony #3013-34 Stock Fastener Motor Case Kit 1940-1947 Harley-Davidson Knucklehead - Parkerized
$51.70

Colony #3034-16 Lower Motor Mount Kit Harley-Davidson All 45's 1930-1936 VL - Parkerized
1 review $32.95

Colony #7911 Complete Show Bike Kit Acorn Hardware 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $400.47

Colony #8515 Complete Show Bike Kit Cap Style Hardware 1976-1977 Harley-Davidson Shovelhead - Chrome Plated
$383.08

Colony #7910 Complete Show Bike Kit Acorn Hardware 1970-1975 Harley-Davidson Shovelhead - Chrome Plated
$383.08

Colony #7908 Complete Show Bike Kit Acorn Hardware 1958-1965 Harley-Davidson Panhead - Chrome Plated
$383.08

Colony #7903 Complete Show Bike Kit Acorn Hardware 1974-1976 Harley-Davidson Sportster - Chrome Plated
2 reviews $339.27

Colony #7902 Complete Show Bike Kit Acorn Hardware 1971-1973 Harley-Davidson Sportster - Chrome Plated
$339.27

Colony #3046-3 Rocker Box Oil Feed Line Fittings 1942-1947 Harley-Davidson Knucklehead - Parkerized
$19.51

Colony #1024-P Complete Show Bike Kit Smooth Allen Hardware 2007-2008 Harley-Davidson FLT - Chrome Plated
$265.65

Colony #1018-P Complete Show Bike Kit Smooth Allen Hardware 2000-2006 Harley-Davidson Twin Cam 88B Softail - Chrome Plated
$257.24

Colony #1026-P Complete Show Bike Kit Smooth Allen Hardware 2009-Up Harley-Davidson FLT - Chrome Plated
$245.03

Colony #3065-36 Valve Cover Kit 1939-1948 Harley-Davidson UL/ULH Sidevalves - Parkerized
1 review $236.50

Colony #1019-P Complete Show Bike Kit Smooth Allen Hardware 1987-1991 Harley-Davidson FLT/FXR - Chrome Plated
$234.50

Colony #3033-2 Rear Motor Mount Nut Kit 1962-1978 Harley-Davidson XL/XLH/XLCH
1 review $19.36

Colony #3049-7 Chain Oiler Adjusting Screw Kit 1932-E1950 Harley-Davidson Twins 1932-1957 45's - Parkerized
$12.09

Colony #1020-P Complete Show Bike Kit Smooth Allen Hardware 1992-1998 Harley-Davidson FLT/FXR - Chrome Plated
$230.23

Colony #3085-4 Crank Pin Nut Lockwasher Kit Harley-Davidson OEM# 368-12
$8.25

Colony #1000 Complete Show Bike Kit Knurled Allen Hardware 1999-2005 Harley-Davidson Twin Cam 88 Dyna - Chrome Plated
$180.49

Colony #9956-18-P Motor Case Mounting Kit Smooth Allen Kit 1999-Up Harley-Davidson Twin Cam 88 Dyna/FLT 2000-Up Twin Cam 88B Softail - Chrome Plated
$23.69

Colony #9942-16-P Lifter Base Smooth Allen Mounting Kit 1999-Up Harley-Davidson Twin Cam 88 Dyna/FLT 2000-Up Twin Cam 88B Softail - Chrome Plated
$16.38

Colony #9937-20-P Front Motor Mount Kit Smooth Chrome Allen Harley Dyna 91-up — Colony #9937-20-P Front Motor Mount Smooth Allen Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
$20.27

Colony #9819-12-P Timing Cover Smooth Chrome Allen Bolt Kit Harley Big Twin 1993-up — Colony #9819-12-P Timing Cover Smooth Allen Bolt Kit 1993-Up Harley-Davidson Big Twin - Chrome Plated
$14.89

Colony #8451-5 Rear Star Hub Cap Screw Kit Harley-Davidson 74s With 1/4-24 Holes - Chrome Plated
$17.14

Colony #8447-8 Lifter Base Cap Screw Kit 1936-1975 Harley-Davidson OHV Big Twins - Chrome Plated
$25.71

Colony #8437-16 Cylinder Base High Crown Cap Nut Set 1930-1977 Harley-Davidson 74s - Chrome Plated
$21.66

Colony #8786-5-P Sprocket Cover Smooth Allen Screw Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
$11.90

Colony #2854-6-P Upper Engine Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $14.52

Colony #2468-8-P Transmission to Motor Mount Smooth Allen Bolt Kit 2007-Up Harley-Davidson Softail/Dyna/FLT - Chrome Plated
$11.14

Colony #2222-11-P Cam Cover Smooth Allen Screw Kit 2004-Up Harley-Davidson Sportster - Chrome Plated
$23.01

Colony #2170-9-P Water Pump Cover Thermostat Smooth Allen Mounting Kit 2002-Up Harley-Davidson VRSC - Chrome Plated
$20.11

Colony #8784-4-P Sprocket Cover Smooth Allen Screw Kit 1971-1976 Harley-Davidson Sportster - Chrome Plated
$7.82

Colony #9928-20-P Motor Mounting Smooth Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
$49.25

Colony #8790-28-P Rocker Box Smooth Allen Bolt Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
1 review $38.59

Colony #8441-1 Timing/Oil Plug All Harley-Davidson Timing Plug and 74s Oil Tanks - Chrome Plated
$8.78

Colony #8737-24-P Valve Cover Smooth Allen Screw Kit Harley-Davidson Panhead With Steel D Rings - Chrome Plated
$33.84

Colony #8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34

Colony #8449-22 Rocker Box and Rocker Shaft Cap Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
1 review $52.87

Colony #8440-12 Rocker Box Cap Bolt Set 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$27.51

Colony #2988-3 Crankcase Breather Stud and Pipe 1939-1947 Harley-Davidson Knuckleheads - Parkerized
$36.00

Colony #2173-3-P Sprocket Cover Smooth Allen Mounting Kit 2002-2005 Harley-Davidson VRSC - Chrome Plated
1 review $6.70

Colony #2979-28 Stock Fastener Motor Case Kit 1930-1936 Harley-Davidson VL - CAD Plated
1 review $51.70

Colony #8491-2 Point Cover Screws Cap Head 1971-Up Harley-Davidson Shovelhead/XL - Chrome Plated
1 review $5.96

Colony #2717-20 Valve Spring Cover Kit 1942-1973 Harley-Davidson 45s - CAD Plated
4 reviews $105.60

Colony #2642-20 Valve Spring Cover Kit 1931-1941 Harley-Davidson Davidson 45's - CAD Plated
$105.60

Colony #2945-1 Cylinder Bracket for Aluminum Heads 1936-1952 Harley-Davidson WL 45 1936-1973 Servi-car - Parkerized
1 review $37.00

Colony #2779-8 Tappet Screw and Nut Kit 1929-1973 Harley-Davidson Side Valves 1952-1953 K Models
$30.25

Colony #2900-1 Motor Sprocket Nut 1991-2006 Harley-Davidson Big Twins
2 reviews $19.36

Colony #2742-2 Left Bearing End Oil Slinger 1936-1954 Harley-Davidson Big Twin
$16.94

Colony #2948-3 Circuit Breaker Mounting Clamp & Stud Kit 1966-1969 Harley-Davidson FL/FLH - CAD Plated
1 review $15.73

Colony #2570-2 Crank Pin Nut Set 1981-1998 Harley-Davidson Sportster - Parkerized
$18.98

Colony #2569-2 Crank Pin Nut Set 1954-1981 Harley-Davidson Sportster/KH - Parkerized
1 review $18.98

Colony #2715-12 Valve Cover Seal Kit 1929-1973 Harley-Davidson 45s
$21.78

Colony #2743-2 Oversized Ignition Timer Cover Stud Kit 1980-Up Harley-Davidson Big Twin/Sportster - Zinc Plated
$13.92

Colony #2640-1 Chain Housing Cover Cap 1965-Early 1966 Harley-Davidson FL/FLH
1 review $13.31

Colony #2853-6 Upper Engine Mounting Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
1 review $12.71

Colony #2913-2 Rocker Stud Spacer Kit 1931-1940 Harley-Davidson Big Twins - Parkerized
$13.31

Colony #2632-3 Circuit Breaker Adjusting Screw Kit 1947-1964 Harley-Davidson Big Twins/45's - CAD Plated
$12.10

Colony #2599-6 Front Wheel Stabilizer Collar Mounting Stud Kit 1930-1952 Harley-Davidson 45 Solo 1930-1940 Servi-car
$11.50

Colony #2877-2 Spring Guide Collar Set 1929-1980 Harley-Davidson All Models
2 reviews $9.68

Colony #2828-1 Crankcase and Chain Housing Drain Plug 1965-1984 Harley-Davidson FL 1971-1984 FX 1967-1992 XL - Chrome Plated
$9.68

Colony #2728-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - Chrome Plated
$9.68

Colony #2892-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - CAD Plated
$8.47

Colony #2863-7 Negative Brush Holder Assembly 1932-1951 Harley-Davidson Big Twins/45s - CAD Plated
$7.87

Colony #2734-3 Transmission 2nd Gear Retaining Bracket Kit 1935-1973 Harley-Davidson 45s - Parkerized
$7.87

Colony #2824-1 Crankcase and Chain Housing Drain Plug 1965-1984 Harley-Davidson FL 1971-1984 FX 1967-1992 Sportster - CAD Plated
$7.26

Colony #2727-1 Chain Housing Top or Shifter Lever Pivot Screw 1965-1984 Harley-Davidson FL 1971-1984 FX - CAD Plated
1 review $7.26

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.