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.

Harley-Davidson Raw Motorcycle Engine

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Lowbrow Customs Complete Solid Motor Mount Kit for 2004 - Up Harley-Davidson Sportster XL
21 reviews $141.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Brass
29 reviews $91.43

Cycle Standard Complete Front Rubber Motor Mount Kit 2004-Up Harley-Davidson Sportsters
$178.42

Gasbox Strong Arm Top Motor Mount With Crank Key Mount 1948-1984 Harley Big Twins
5 reviews $74.95

Gasbox Top Motor Mount - 1957 - 1985 Ironhead Sportster XL - With Coil And Crank Key Start Mount
20 reviews $49.95

Gasbox Strong Arm Top Motor Mount With Coil Mount 1948-84 Harley Big Twins
5 reviews $74.95

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Stainless Steel
13 reviews $114.29

Gasbox Strong Arm Top Motor Mount with Coil Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Gasbox Strong Arm Top Motor Mount for Crank Start Key Switch - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Gasbox Top Motor Mount - 1986-2003 Sportster - With Coil and Stock Ignition Switch Mounts
6 reviews $49.95

Andrews EV27 Camshaft - 1984-1999 Harley-Davidson Big Twin
$226.76 $251.95

Lowbrow Customs Front Solid Motor Mount Kit for 2004 - Up Harley-Davidson Sportster XL
4 reviews $72.06

James Gaskets Top End Gasket Kit 1966-1984 Harley-Davidson Shovelhead
$71.99

Gasbox Strong Arm Top Motor Mount 1948-84 Harley Big Twins
5 reviews $69.95

Gasbox Front Motor Mount Plates - Stainless Steel - 1957 - 1981 Ironhead Sportster
8 reviews $49.95

Gasbox Strong Arm Top Engine Mount For Early Big Twin Engines In Gasbox Frames
$74.95

Gasbox Front Motor Plates For Use With Forward Controls Harley-Davidson Sportsters
1 review $61.36

Cycle Standard Complete Rear Rubber Motor Mount Kit 2004-13 Harley-Davidson Sportsters
$152.44

Lowbrow Customs FiltroMax Belt Drive Mounting Bracket
11 reviews $21.61

Old-Stf Cycle Shovelhead Rocker Box Split Oil Lines - Stainless & Black
$99.95

Cycle Standard Isolator Mount - Front - 2004-2021 Harley-Davidson Sportster XL
1 review $25.00

James Gaskets Cam Change Gasket Kit - 2000-03 Harley-Davidson Sportster XL
1 review $26.16

Gasbox Strong Arm Top Motor Mount With OEM 71425-77 Ignition Switch Mount 1948-84 Harley Big Twins
1 review $74.95

Cycle Standard Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$101.61

Gasbox Top Motor Mount - 1986-2003 Sportster - With Ignition Coil Relocation
6 reviews $39.95

Colony #7132-12 Aluminum Alloy Tubular Adjustable Pushrods & Lifter Adapters - 1966-1984 Harley-Davidson Shovelhead
$85.45

Cycle Standard Swingarm Isolator Mount 1987-2008 Harley-Davidson FLT 87-94 FXR
1 review $25.05

James Gaskets Top End Gasket Kit 1973-1985 Harley-Davidson Sportster
2 reviews $42.03

Old-Stf Cycle Pushrod Cover Keeper Set - Drilled Brass - Big Twin Evo Shovelheads & Knuckles
17 reviews $40.00

Colony #8204-4 Hydraulic Lifter Converters Eliminate Hydraulic Units 1953-Up Harley-Davidson Big Twins
$34.05

Colony #8603-8 Adjustable Pushrod & Solid Lifter Kit 1984-Up Harley-Davidson Evo
2 reviews $102.11

Cycle Standard Rear Motor Engine Mount 1967-1981 Harley Davidson Ironhead Sportster OEM 16203-67
4 reviews $90.97

Gasbox Front Motor Mount Spacer Plate Harley-Davidson Knucklehead Panhead UL OEM 438-48 24795-48
5 reviews $15.00

James Gaskets Complete Rocker Cover Gasket Kit 1984-1991 Harley-Davidson Evo Big Twin
$88.41

James Gaskets Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
$40.59

#2233-12 Rocker Arm Shaft Washer O-Ring Kit Harley Shovelhead 66-84 — Colony #2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
21 reviews $6.05

Old-Stf Cycle Ironhead Sportster Rocker Box Loop Oil Lines - Brass
13 reviews $64.00

Colony #7518-4 Aluminum Alloy Tubular Pushrods 1936-1947 61c.i. Harley-Davidson Knucklehead
$55.00

Colony #7123-4 Aluminum Alloy Pushrod Kits - 1957-1985 Harley-Davidson Harley-Davidson Sportster
2 reviews $55.00

James Gaskets Cam Change Gasket Kit - 2004-Up Harley-Davidson Sportster XL
$26.16

Colony #9213-4 Upper Inner Pushrod Covers 1979-Up Harley-Davidson Shovelhead 1984-Up Evo 1986-1990 XL
1 review $39.11

Colony #8728-12 Rubberized Cork Pushrod Cover Seals Pre-1979 Harley-Davidson Panhead/Shovelhead
18 reviews $9.08

James Gaskets Cam Change Gasket Kit with Metal Cam Cover Gasket - 1993-99 Harley-Davidson 80 inch Big Twin
$36.14

Colony #2142-12 Pushrod Cover Seal Kit 1979-1984 Harley-Davidson Shovelhead
3 reviews $13.40

Cometic Gasket Inc. Cam Change Gasket Kit - 1993-99 Harley-Davidson Big Twin
$26.20

Cometic Gasket Inc. Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20

Colony #3351-4 Rocker Arm Thrust Washer Kit 1936-1947 Harley-Davidson Knucklehead
$12.09

Colony #2146-2 Tappet Oil Screen & Spring 1970-1999 Harley-Davidson Big Twin
2 reviews $10.42

Colony #2496-2 Tappet Oil Screen and Spring 1966-1969 Harley-Davidson Shovelhead
$6.96

Colony #3558-1 Sprocket Shaft Seal 1939-1973 Harley-Davidson 45's
$6.60

S&S Cycle Quickee Adjustable Pushrod Set - 1991-2022 Harley-Davidson XL 1999-2017 Twin Cam 2017-2023 M8
$188.96 $209.95

Colony #3528-2 Manifold Intake Nipple Brass Seals 1923-1924 Harley-Davidson DCA/DCB 1925-1929 74" 1928-29 61"
$7.87

Colony #3526-2 Brass Intake Manifold Seals fits 1917-1923 Harley-Davidson 61"
$7.26

Colony #7120-4 Aluminum Valve Retainers - All Harley-Davidson Davidson OHV 74's
$35.13

Gasbox Strong Arm Top Motor Mount - 1984-1999 Harley-Davidson Big Twin Evolution
$74.95

Colony #3145-4 Rocker Box Drain Tube Kit 1936-1937 Harley-Davidson 61 Knucklehead
$35.00

Hawg Supply "Swirl" Engine Cover 1936-1954 Harley-Davidson Big Twins - Machined Finish
$99.99

Colony #3557-1 Sprocket Shaft Bearing Retainer Seal 1955-1968 Harley-Davidson 74's
$8.25

Colony #3556-1 Sprocket Shaft Seal 1940-1954 Harley-Davidson Big Twins
$6.60

Cycle Standard Isolator Motor Mount - Front - 1991-2017 Harley-Davidson Dyna
3 reviews $108.56

Cycle Standard Isolator Motor Mount - Rear - 1999-2017 Harley-Davidson Dyna
1 review $125.41

Cycle Standard Isolator Mount - Rear - 2004-2021 Harley-Davidson Sportster XL
1 review $24.96

Colony #3658-8 Circuit Breaker To Coil Wire Fastener Assembly 1949-1964 Harley-Davidson Twins/K/KH/Sportster
$9.90

Colony #3657-8 Circuit Breaker To Coil Wire Fastener Assembly 1936-1948 Harley-Davidson All Twins
$9.90

Cycle Standard Front Motor Mount 1982-94 Harley-Davidson FXR 80-08 FLH FLT
$31.61

Cycle Standard Complete Rear Rubber Motor Mount Kit 2014-Up Harley-Davidson Sportsters
$151.83

James Gaskets Complete Rocker Cover Gasket Kit 1986-1990 Harley-Davidson Sportster
$62.60

James Gaskets Top End Gasket Kit 1957-1971 Harley-Davidson Sportster
1 review $37.10

Colony #3671-1 Starter Solenoid Plunger Cover 1965-1988 Harley-Davidson Big Twins 1967-1980 XL
$9.68

Andrews V4 Camshafts - 1986-1990 Harley-Davidson Sportster XL
$454.46 $504.95

S&S Cycle Quickee Adjustable Pushrod Set With Chrome Covers- 2004-2021 Harley-Davidson Sportster XL
$294.26 $326.95

S&S Cycle Quickee Adjustable Pushrod Set - 1984-1999 Harley-Davidson Big Twin
2 reviews $202.46 $224.95

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