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.

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Colony #9774-8-P Oil Pump Mounting Kit Smooth Chrome Allen Harley Sportster 1991-up
$9.68

Colony #9760-4-P Lifter Base Smooth Chrome Allen Bolt Kit Harley Sportster 1995-03
$8.78

Colony #9759-4-P Lifter Base Smooth Chrome Allen Screw Kit Harley Sportster 1991-94
$9.56

Colony #9752-4-P Oil Filter Adaptor Smooth Chrome Screw Kit Harley XL 1986-1990
$7.96

Colony #9748-16-P Head Bolt Smooth Chrome Allen Bolt Kit Harley Sportster 1973-85
$52.87

Colony #9747-16-P Head Bolt Smooth Chrome Allen Kit Harley Sportster 1957-72
$49.25

Colony #8817-10-P Oil Pump Mounting Kit Chrome Smooth Chrome Allen Harley Sportster 1977-90
$10.79

Colony #8816-10-P Oil Pump Mounting Kit Chrome Smooth Allen Harley Sportster 1954-76
$11.53

Colony #8477-12 Oil Pump Screw Kit Chrome Cap Style Harley Big Twin 1978-91
$27.51

Colony #8472-3 Sprocket Cover Chrome Cap Nut Screw Kit Harley Sportster 77-85
$13.94

Colony #8471-14 Rocker Box High Crown Chrome Cap Bolt Kit Harley Sportster 1977-85
$60.12

Colony #8465-16 Heat Treated Chrome Cap Style Head Bolt Kit Harley Sportster 73-85 1000cc
$57.94

Colony #8460-20 Heat Treated Chrome Cap Style Head Bolt Kit Harley Knucklehead 1940-47
$66.63

Colony #8454-8 Cam Cover Chrome Cap Screw Kit Harley Sportster 1971-85
$28.25

Colony #8450-4 Lifter Base Chrome Cap Bolt Kit Harley Sportster 57-85
$15.52

Colony #8448-14 Rocker Box High Crown Chrome Cap Bolt Kit Harley Sportster 1957-76
$61.56

Colony #8439-13 Oil Pump Cap Nut / Block Off Plug Chrome Cap Nut Set Harley 1936-67
$20.70

Colony #2952-6 Slotted 1/4-24 thread Nuts Pre-1930 Harley-Davidson Motor Case OEM# 451-09 - Nickel Palted
$21.18

Colony #2709-24-P Upper and Lower Motor Mount Kit Smooth Allen 2009-Up Harley-Davidson FLT - Chrome Plated
$36.30

Colony #2344-10-P Oil Pan Mounting Kit Smooth Allen 2006-Up Harley-Davidson Dyna - Chrome Plated
$21.60

Colony #7933 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2007-up Twin Cam 88 Softail - Chrome Plated
$346.14

Colony #7906 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1940-1947 Knucklehead - Chrome Plated
$395.76

Colony #3076-36 Valve Cover Kit 1939-1948 Harley-Davidson UL/ULH - Chrome Plated
$269.50

Colony #3061-14 Head Bolt Kit 1929-19347 Harley-Davidson Singles - Parkerized
$85.25

Colony #3029-12 Pushrod Covers 1940-1947 Harley-Davidson Knucklehead - CAD Plated
$54.67

Colony #3027-20 Upper Pushrod Covers Kit 1940-1947 Harley-Davidson Knucklehead - Parkerized
$50.08

Colony #3026-12 Pushrod Covers 1940-1947 Harley-Davidson Knucklehead - Parkerized
$54.67

Colony #1004-P Complete Show Bike Kit Smooth Allen Hardware Harley-Davidson 1992-1999 Softail - Chrome Plated
$251.56

Colony #1004 Complete Show Bike Kit Allen Hardware Harley-Davidson 1992-1999 Softail - Chrome Plated
$211.75

Colony #9935-8-P Transmission to Motor Mount Kit Smooth Allen 1999-2006 Harley-Davidson Twin Cam - Chrome Plated
$14.34

Colony #9881-2 Generator Screw Kit Stock 1971-1985 Harley-Davidson Sportster - Zinc Plated
$7.51

Colony #9757-2-P Generator Smooth Allen Mounting Screws 1957-1970 Harley-Davidson Sportster - Chrome Plated
$13.55

Colony #2994-8-P Center Motor Mount Kit Smooth Allen 1992 Harley-Davidson Sportster - Chrome Plated
$13.02

Colony #2993-8-P Center Motor Mount Kit Smooth Allen 1986-1990 Harley-Davidson Sportster - Chrome Plated
$13.02

Colony #2955-34 Rocker Arm Cover Screw Kit 1938 Harley-Davidson 61" OHV - Parkerized
$52.36

Colony #2911-2 Crank Pin Nut Set 1915-1936 Harley-Davidson All Twins - CAD Plated
$23.75

Colony #2468-8-P Transmission to Motor Mount Smooth Allen Kit 2007-Up Harley-Davidson Softail/Dyna/FLT - Chrome Plated
$14.34

Colony #2229-16 Motor Mount Kit Acorn 2004-Up Harley-Davidson Sportster - Chrome Plated
$55.28

Colony #2223-11 Cam Cover Acorn Screw Kit 2004-Up Harley-Davidson Sportster - CAD Plated
$35.70

Colony #2171-17 Clutch Cover Mounting Kit Allen 2002-Up Harley-Davidson VRSC - Chrome Plated
$20.31

Colony #2168-22-P Cam Cover Mounting Kit Smooth Allen 2002-Up Harley-Davidson VRSC - CAD Plated
$39.25

Colony #8521 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1989-1991 Softail 91 Dyna Glide - Chrome Plated
$311.38

Colony #8520 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1987-1988 Softail - Chrome Plated
$311.38

Colony #8519 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1986-1990 Sportster - Chrome Plated
$252.00

Colony #8517 Complete Show Bike Kit Cap Style Hardware Harley-Davidson Evolution w 4 Speed - Chrome Plated
$240.78

Colony #8516 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1979-1984 FLT - Chrome Plated
$414.58

Colony #8506 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1940-1947 Knucklehead - Chrome Plated
$395.76

Colony #8504 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1977-1985 Sportster - Chrome Plated
$341.08

Colony #8503 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1974-1976 Sportster - Chrome Plated
$339.27

Colony #8502 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1971-1973 Sportster - Chrome Plated
$339.27

Colony #7935 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2004-up Sportster - Chrome Plated
$254.93

Colony #7934 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2006-up Dyna - Chrome Plated
$313.51

Colony #7932 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2007-up FLT - Chrome Plated
$317.52

Colony #7931 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1996-1998 FLT/FXR - Chrome Plated
$301.84

Colony #7930 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1992-1995 FLT/FXR - Chrome Plated
$307.25

Colony #7929 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1987-1991 FLT/FXR - Chrome Plated
$304.55

Colony #7928 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2000-2006 Softail Twin Cam - Chrome Plated
$346.14

Colony #7926 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1999-2006 FLT - Chrome Plated
$320.07

Colony #7925 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1999-2005 Twin Cam Dyna - Chrome Plated
$330.22

Colony #7924 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1996-1999 Softail 1996-1998 Dyna Glide - Chrome Plated
$320.07

Colony #7923 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1992-1995 Softail Dyna Glide - Chrome Plated
$325.86

Colony #7921 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1989-1991 Softail 91 Dyna Glide - Chrome Plated
$311.38

Colony #7920 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1987-1988 Softail - Chrome Plated
$311.38

Colony #7909 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1966-1969 Shovelhead - Chrome Plated
$397.20

Colony #7905 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1936-1939 Knucklehead - Chrome Plated
$395.76

Colony #7904 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1977-1985 Sportster - Chrome Plated
$341.08

Colony #7901 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1965-1970 Sportster - Chrome Plated
$334.55

Colony #7900 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1957-1964 Sportster - Chrome Plated
$322.26

Colony #3441-13 Motor Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$24.88

Colony #3440-12 Motor Case Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$45.01

Colony #3439-20 Rocker Box Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$51.04

Colony #3307-4 Intake and Exhaust Rocker Arm Cover Return Oil Line Nuts 1938-1947 Harley-Davidson Knucklehead
$21.56

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