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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Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1973-92 Harley-Davidson Big Twin
1 review $175.06

Cycle Standard Nose Cone Cam Gear Cover - Chrome - 1993-99 Harley-Davidson Big Twin
$141.56

Colony #8309 CHR Complete Stock Hardware Kit - 1937-1973 Harley-Davidson 45 with Aluminum Head - Chrome Plated
$404.22

Colony #1013-P Complete Show Bike Kit Smooth Allen Hardware 1994-2003 Harley-Davidson Sportster - Chrome Plated
4 reviews $201.81

Colony #8308 CHR Complete Stock Hardware Kit - 1937-1973 Harley-Davidson 45 with Cast Iron Head - Chrome Plated
$366.55

Colony #7135-8 Custom Pushrod Covers - 1949-1984 Harley-Davidson Panhead/Shovelhead - Chrome Plated
5 reviews $80.00

Colony #2667-22-P Lower Motor Mount Allen Bolt Kit 1999-2003 Harley-Davidson Sportster - Chrome Plated
2 reviews $35.87

Colony #2255-36 Adjustable Pushrod Cover Kit 1990-2003 Harley-Davidson Sportster - Chrome Plated
2 reviews $140.00

Colony #8320 CHR Complete Stock Hardware Kit - 1974-1976 Harley-Davidson Sportster - Chrome Plated
$256.05

Colony #8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
1 review $58.66

Colony #2012-8 Head Bolt Set 12 Point 1992-Up Harley-Davidson Big Twin 1993-Up XL - Chrome Plated
4 reviews $109.99

Colony #1011-P Complete Show Bike Kit Smooth Allen Hardware 1976-1977 Harley-Davidson Shovelhead - Chrome Plated
$213.18

Colony #8806-17 Motor Mounting Kit Upper & Lower 1970-1984 Harley-Davidson Big Twin - Chrome Plated
4 reviews $39.11

Colony #1016 Complete Show Bike Kit Knurled Allen Hardware 1977-1985 Harley-Davidson Sportster - Chrome Plated
$190.44

Lowbrow Customs Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
9 reviews $26.42

Cycle Standard Engine Stabilizer Link - Chrome - 1995-2017 Harley-Davidson Dyna
$90.55

Colony #9926-17-P Upper and Lower Motor Mount Smooth Allen Kit 1970-1984 Harley-Davidson Shovelhead - Chrome Plated
3 reviews $43.45

British Standard Side Cover Allen Hardware Set - Triumph 650 / 750 c.c. Motorcycles 1969 & up
7 reviews $22.86

Colony #1022 Complete Show Bike Kit Allen Knurled Hardware 2004-Up Harley-Davidson Sportster - Chrome Plated
$159.18

Cycle Standard Ride-On Engine Stablizer Link Kit 1982-94 Harley-Davidson FXR 91-94 Dyna 80-08 Touring
$97.02

Colony #8220-20 Head Bolt Kit 1940-1947 Harley-Davidson Knucklehead - Chrome Plated
$76.76

Colony #8219-20 Head Bolt Kit 1936-1939 Harley-Davidson Knucklehead - Chrome Plated
$76.76

Colony #7508-20 Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead Shovelhead and Evo - Chrome Plated
3 reviews $50.08

Colony #9798-20 Front Motor Mount Kit Stock 1957-1984 Harley-Davidson Sportster - Chrome Plated
2 reviews $47.38

Cycle Standard Rocker Box Covers - Chrome - 1948-65 Harley-Davidson Panhead
2 reviews $136.30

Colony #9772-22 Lower Motor Mount Allen Screw Kit 1986-1998 Harley-Davidson Sportster - Chrome Plated
1 review $33.84

Colony #2967-10 Grade 8 Head Bolt Kit 1977-1984 Harley-Davidson Shovelhead - Chrome Plated
1 review $65.99

Colony #7629-14 High Crown Acorn Rocker Box Bolt Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
$62.27

Colony #8224-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - Chrome Plated
9 reviews $40.61

Colony #9797-20-P Front Motor Mount Smooth Allen Kit 1957-1985 Harley-Davidson Ironhead Sportster - Chrome Plated
2 reviews $60.83

Cycle Standard Engine Stabilizer Link - Chrome - 1982-94 Harley-Davidson FXR 91-94 Dyna 80-08 Touring
1 review $73.06

Colony #8164-19 Upper And Lower Motor Mount Kit 1936-1969 Harley-Davidson Big Twin OHV - Chrome Plated
5 reviews $57.53

Colony #2011-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Chrome Plated
2 reviews $109.99

Colony #9772-22-P Lower Motor Mount Smooth Allen Kit 1986-1998 Harley-Davidson Sportster - Chrome Plated
1 review $35.87

Colony #8104-16 Cylinder Base Nuts 1930-1978 Harley-Davidson Big Twins - Chrome Plated
$20.99

Colony #7502-2 Oversize Drain Plug & Tap Kit 1965-Up Harley-Davidson Big Twins 1967-Up Sportster - Chrome Plated
1 review $46.35

British Standard Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3 reviews $40.39

Colony #8608-36 Rocker Box Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $20.11

Colony #8221-20 Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
8 reviews $76.76

Colony #2091-12 Replacement Pushrod Covers Late 1979-1984 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $70.39

Colony #8931-16-P Rocker Cover Smooth Allen Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01

Colony #8457-20 Heat Treated Cap Style Head Bolt Kit 1948-1983 Harley-Davidson Panhead/ Shovelhead - Chrome Plated
$66.63

Colony #7823-12 Pushrod Covers 1948-Early 1979 Harley-Davidson Panhead & Shovelhead - Chrome Plated
4 reviews $64.80

Colony #8777-20-P Smooth Allen Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
$62.27

Colony #7822-12 Pushrod Covers 1957-E1979 Harley-Davidson Sportster - Chrome Plated
2 reviews $57.94

Lowbrow Customs Triumph Oil Feed Chrome Rocker Box Acorn Nuts and Copper Washers #70-1435 70-1335
11 reviews $28.93

Colony #7824-12 Pushrod Covers 1940-1947 Harley-Davidson Knuckleheads - Chrome Plated
$54.67

Colony #9927-28-P Upper and Lower Motor Mount Kit Smooth Allen 1984-1999 Harley-Davidson Softail - Chrome Plated
$53.58

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

Colony #2024-4 Headbolt Covers L1985-Up Harley-Davidson FL/FX/XL - Chrome Plated
1 review $52.14

Colony #2232-4 Headbolt Smooth Covers 1985-Up Harley-Davidson FL/FX/XL - Chrome Plated
1 review $52.14

Colony #7137-22 High Crown Acorn Rocker Box Bolt Kit - 1966-1984 Harley-Davidson Shovelhead - Chrome Plated
4 reviews $51.43

Colony #7401-2 Tach Drive Block Off Plug 1971-1984 Harley-Davidson Sportster - Chrome Plated
6 reviews $17.14

Colony #9793-9 Upper Motor Mount Kit Allen 1986-2003 Harley-Davidson Sportster - Chrome Plated
$12.67

Colony #8602-20 Oversize Stroker Upper Pushrod Cover Kit 1940-1947 Harley-Davidson Knucklehead & All Shovelhead - Chrome Plated
1 review $50.08

Colony #7507-20 Upper Pushrod Cover Kit 1957-1985 Sportster 1948-1965 Panhead - Chrome Plated
3 reviews $50.08

Colony #8860-8 Cylinder Base Stud Spacer 1978-1984 Harley-Davidson Shovelhead OEM# 16836-78 - Chrome Plated
1 review $24.98

Colony #9944-24-P Rocker Box Smooth Allen Mounting Kit 1999-Up Harley-Davidson Twin Cam 88 Dyna/FLT 2000-Up Twin Cam 88B Softail - Chrome Plated
$24.71

Colony #9927-28 Upper & Lower Motor Mounting Allen Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$49.25

Gasbox 2007-2022 Harley-Davidson Sportster EFI Coil Adapter for Gasbox Top Motor Mounts
$24.00

Colony #9833-24 Rocker Cover Allen Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
2 reviews $23.91

Colony #9521-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Chrome Plated
$47.80

Cycle Standard Rocker Oil Lines - Chrome - 1957-85 Harley-Davidson Sportsters
4 reviews $23.86

Colony #9771-8 Center Motor Mount Allen Screw Kit 1986-2003 Harley-Davidson Sportster - Chrome Plated
1 review $11.90

Colony #2205-4 Swing Arm Pivot Hex Bolts 1984-1999 Harley-Davidson Softail - Chrome Plated
$47.38

Colony #8732-24 Valve Cover Screws 1-1/4 inch Long 1954-1965 Harley-Davidson Panhead With Alloy D-Rings - Chrome Plated
1 review $41.97

Colony #9751-11 Cam Cover Allen Screw Kit 1986-Up Harley-Davidson Sportster 86-Up - Chrome Plated
3 reviews $20.85

Colony #8400-8 Rocker Shaft Cap Nut & Washer Kit 1966-1985 Harley-Davidson Shovelhead 1957-1985 Sportster - Chrome Plated
$12.74

Colony #3685-12 Lower Motor Mount Kit 1966-1969 Harley-Davidson OHV Big Twins - Chrome Plated
$36.03

Colony #9644-2 Oil Screen Plug 1981-Up Harley-Davidson FL/FX - Chrome Plated
$11.96

Colony #8761-7 Timing Cover Knurled Allen Screw Kit 1970-1992 Harley-Davidson Shovelhead/Evo - Chrome Plated
2 reviews $11.90

Colony #7142-4 Knucklehead Type Rocker Arm Shaft End Plug - 1971-1985 Harley-Davidson Shovelhead 1971-85 Sportster - Chrome Plated
6 reviews $34.85

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