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.

Chrome Motorcycle Engine

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Colony #7808-4 Upper Pushrod Covers (Inner) 1957-1985 Harley-Davidson Sportster 1936-Early 1979 OHV Big Twins
3 reviews $34.05

Colony #8870-21 Lower Motor Mount Kit Acorn Head 1986-1992 Harley-Davidson Sportster - Chrome Plated
$33.67

Colony #2668-21 Lower Motor Mount Acorn Kit 1993-2003 Harley Sportster - Chrome Plated
1 review $33.67

Colony #8789-28-P Rocker Box Smooth Allen Bolt Kit 1957-1976 Harley-Davidson Sportster - Chrome Plated
$33.50

Colony #8600-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Chrome Plated
2 reviews $32.60

Colony #8708-8 Lifter Base Screw Kit 1976-Up Harley-Davidson Big Twin - Chrome Plated
1 review $16.26

Colony #7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6 reviews $31.87

Colony #9412-19 Timing Cover Screw Kit 1937-1973 Harley-Davidson 45's - Chrome Plated
$30.87

Colony #9633-50 Flatwashers Harley-Davidson FL/FX/XL OEM# 6099 - Chrome Plated
6 reviews $14.52

Colony #9603-2 Oil Screen Plug 1952-1965 Harley-Davidson Big Twin - Chrome Plated
$14.34

Colony #8706-6 Tappet Oil Screen/Oil Pump Check Valve/Relief Valve Plug Set 1970-1980 Harley-Davidson Big Twin - Chrome Plated
1 review $28.60

Colony #8470-8 Lifter Base Cap Screw Kit 1976-Up Harley-Davidson 74s - Chrome Plated
$27.89

Colony #8747-12-P Oil Pump Mounting Kit Smooth Allen Screw Kit 1978-1991 Harley-Davidson Shovelhead & Evolution - Chrome Plated
$13.78

Colony #2215-4 Swing Arm Pivot Hex Bolts 1984-1999 Harley-Davidson Softail - Chrome Plated
3 reviews $27.07

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1966 - 1970 Harley-Davidson Shovelhead, 1957 - 1970 Sportster
2 reviews $26.42

Colony #8936-3 Pivot Bolt Washer & Spacer 1973-1978 Harley-Davidson XL - Chrome Plated
3 reviews $25.71

Colony #7827-12 Oil Pump Acorn Screw Kit 1978-1991 Harley-Davidson Big Twins - Chrome Plated
$25.71

Colony #3780-18 Rocker Box Flange Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
$25.00

Colony #8736-24 Valve Cover Screws 1954-1965 Harley-Davidson Panhead With Steel D-Rings - Chrome Plated
$24.71

Colony #2101-12 Timing Cover Phillips Screw Kit 1950-1952 Harley-Davidson Big Twin - Chrome Plated
$24.20

Colony #8778-12 Rocker Box Mounting Kit 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$22.80

Colony #2364-16 Lifter Base Screw Kit 1954-1975 Harley-Davidson Big Twins - Chrome Plated
2 reviews $22.78

Colony #9100-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM# 16838-78 - Chrome Plated
2 reviews $22.75

Colony #2226-4-P Sprocket Cover Smooth Allen Kit 2004-Up Harley-Davidson Sportster - Chrome Plated
$11.17

Colony #9634-4 Oil Pump Check & Relief Valve Plugs 1981-Up Harley-Davidson FL/FX - Chrome Plated
1 review $21.73

Colony #8438-16 Cylinder Base High Crown Cap Nut Set 1957-1985 Sportster 1969-Up Triumph - Chrome Plated
$21.60

Colony #9946-20-P Cam Cover Mounting Kit Smooth Allen Kit 1999-Up Harley-Davidson Twin Cam 88 Dyna/FLT 2000-Up Twin Cam 88B Softail - Chrome Plated
3 reviews $20.85

Colony #8931-16 Rocker Cover Allen Head Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3 reviews $20.85

Colony #9944-24 Rocker Box Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
1 review $19.36

Colony #9960-1 Oversize Plated Allen Timing Plug 11/16"-16 Threads Harley-Davidson OEM# 720 - Chrome Plated
1 review $9.56

Colony #9762-16-P Oil Pump Mounting Kit 1992-Up Harley-Davidson Big Twins - Chrome Plated
$18.62

Colony #3023-34 Rocker Arm Cover Screw Kit 1939-1947 Harley-Davidson Knucklehead - Chrome Plated
1 review $18.51

Colony #2070-1 Oil Line Fitting Chrome 1/8 NPT Thread for 3/8 inch Hose OEM# 63533-41 - Chrome Plated
5 reviews $4.54

Colony #9835-8 Chrome Countersink Washer Set for 5/16" Flat Head Socket Harley-Davidson - Chrome Plated
$16.73

Colony #9605-2 Oil Pump Relief Valve Plug 1954-1967 Harley-Davidson Big Twin - Chrome Plated
1 review $15.14

Colony #2852-6 Upper Engine Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $14.52

Colony #8704-2 Tappet Oil Screen Plug 1952-1965 Harley-Davidson Big Twin OEM# 24987-52 - Chrome Plated
$13.55

Colony #9942-16 Lifter Base Mounting Allen Kit 1999-up Harley-Davidson Twin Cam 88 Dyna/FLT 2000-Up Twin Cam 88B Softail - Chrome Plated
$13.40

Colony #9793-9-P Upper Motor Mount Smooth Allen Kit 1986-2003 Harley-Davidson Sportster - Chrome Plated
$13.40

Colony #9771-8-P Center Motor Mount Kit Smooth Allen Kit 1991 & 1993-2003 Harley-Davidson Sportster - Chrome Plated
2 reviews $13.02

Colony #2793-2 Swing Arm End Plates 1979-2004 Harley-Davidson Sportster - Chrome Plated
3 reviews $12.74

Colony #8402-2 Point Cover Acorn Head Screws 1971-Up Harley-Davidson Shovelhead & Sportster - Chrome Plated
3 reviews $5.96

Colony #8747-12 Oil Pump Mounting Kit 1978-1991 Harley-Davidson Shovelhead/Evo - Chrome Plated
$11.53

Colony #9402-1 Timing Plug 1970-Up Harley-Davidson OEM# 720 - Chrome Plated
$11.00

Colony #8780-4 Pushrod Tappet Adjuster Locknuts Harley-Davidson OHV Big Twins/45's/XL/K models OEM# 18570-38
1 review $11.00

Colony #8864-4 Oil Filter Adaptor Screw Kit Allen Head 1986-Up Harley-Davidson Sportster - Chrome Plated
$10.76

Colony #8816-10 Oil Pump Mounting Allen Kit 1954-1976 Harley-Davidson Sportster - Chrome Plated
$10.42

Colony #7817-1 Acorn Head Motor Sprocket Nut 1957-Up Harley-Davidson Sportster - Chrome Plated
$10.37

Colony #8488-10 Cylinder Head Bolt Washers 1948-Up Harley-Davidson OEM# 6469 - Chrome Plated
$9.96

Colony #8782-4-P Lifter Base Smooth Allen Screw Kit 1957-1990 Harley-Davidson Sportster - Chrome Plated
1 review $9.56

Colony #9845-4 Lifter Base Hex Screw Kit 1957-1985 Harley-Davidson Sportster - Chrome Plated
$7.45

Colony #8495-1 1937-1986 Harley-Davidson Big Twin Transmission & Sportster XL Motor Case Drain Plug OEM# 707 - CAD Plated
3 reviews $6.78

Colony #2494-3 Ignition Module Side Cover Button Allen Screw Kit 1986-2002 Harley-Davidson Sportster - Chrome Plated
3 reviews $6.38

Drag Specialties Chrome Rocker Box Cover 1992-1999 Harley-Davidson EVO Big Twins
$354.27

Cycle Standard Rocker Box Covers - Chrome - 1986-2003 Harley-Davidson Sportster XL
$146.59

Colony #8524 Complete Show Bike Kit Cap Style Hardware Harley-Davidson 1996-1999 Softail 1996-1998 Dyna Glide - Chrome Plated
$320.07

Colony #2893-3 Starter Crank Clamp Bolt 1941-1967 Harley-Davidson FL/FLH - Chrome Plated
$6.05

Colony #9970-20 Upper Pushrod Cover Kit Harley-Davidson Twin Cam 1999-Up - Chrome Plated
$50.08

Colony #9843-8 Chrome Countersink Washer Set for #10 Flat Head Socket Screws Harley-Davidson - Chrome Plated
$13.94

Colony #7110-8 Knuckle Nut Set With O-ring Seal - 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$47.80

Colony #7100-13 Oil Pump Acorn Nut & Block Off Plug Set - 1936-1967 Harley-Davidson Davidson 74's - Chrome Plated
$20.31

Colony #7017-16 High Crown Acorn Cylinder Base Nut Set - 1930-1977 Harley-Davidson 74's - Chrome Plated
$21.66

Colony #2068-10 Allen Screw Motor Case Kit - 1977-1990 Harley-Davidson Sportster - Chrome Plated
$31.35

Colony #3092-24 Valve Spring Cover Kit 1937-1938 Harley-Davidson Big Twin Side Valve - Chrome Plated
$231.00

Colony #3091-24 Valve Spring Cover Kit 1930-1936 Harley-Davidson VL - Chrome Plated
$231.00

Colony #7936 Complete Show Bike Kit Acorn Hardware 2017-Up Harley-Davidson Touring Models - Chrome Plated
$331.25

Colony #1028 Complete Show Bike Kit Knurled Allen 2017-Up Harley-Davidson Touring Models - Chrome Plated
$200.45

Colony #1027 Complete Show Bike Kit Knurled Allen 2007-Up Harley-Davidson VRSC - Chrome Plated
$112.28

Colony #3688-15 Lower Motor Mount Kit 1937-1947 Harley-Davidson Side Valve Big Twins - Chrome Plated
$43.45

Colony #3443-2 Point Cover Mounting Kit 2004-Up Harley-Davidson Sportster 2017-Up Touring Models - Chrome Plated
$6.05

Colony #3125-14-P Motor Mounting Kit 2017-Up Harley-Davidson Touring Models - Chrome Plated
$23.10

Colony #8305 CHR Complete Stock Hardware Kit - 1940-1948 Harley-Davidson 74 & 80 Cast Iron Head - Chrome Plated
$388.19

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