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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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

British Standard Oil Pump unit Triumph Motorcycles 1963-1980 - Made in the UK OEM # 70-9421
12 reviews $162.03

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

S&S Cycle H-Grind Camshaft - 1948-1969 Harley-Davidson Big Twin
1 review $230.36 $255.95

SRM Engineering SRM Oil Pressure Release Valve for unit Triumph & BSA Motorcycles
11 reviews $114.90

EMGO Pistons for Triumph 650 c.c. Motorcycles - +0.060
3 reviews $114.66

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

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

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

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

EMGO Top End Engine Gasket Set Triumph 650cc 1963-72 T120 Bonneville TR6 Tiger
6 reviews $77.14

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

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

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

Kibblewhite Precision Machining Black Diamond Exhaust Valve Triumph 650 750 OEM # 70-2904
3 reviews $31.01

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - .060 over
$60.45

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

EMGO Pistons for Triumph 650 c.c. Motorcycles - +0.020
4 reviews $114.66

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

British Standard Engine Oil Seal Kit - 7 Piece - 1963 - 1972 Triumph Unit 650
21 reviews $50.19

Kibblewhite Precision Machining Tappet Blocks 1969- 1983 for Triumph 650 / 750 Twins OEM # E9352 E9353
2 reviews $99.99

British Standard Rocker Box Oil Feed Pipe for Triumph 650 / 750 c.c. 1963 - 1982 #71-2428
5 reviews $92.41

British Standard Rod Bearings for Triumph 650 and 750 c.c. Motorcycles - Standard OEM # 70-3586
19 reviews $91.75

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

British Standard Metric Timing Side Crankshaft Bearing for 1972-80 Triumph 650 750 Unit Twin Motorcycles OEM # 70-3835
$87.90

Kibblewhite Precision Machining Intake Valve Standard Triumph 650 / 750 1963-83
1 review $21.49

Kibblewhite Precision Machining Exhaust Valve Standard Triumph 650 / 750 1963-83
5 reviews $21.49

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

British Standard Triumph Copper Head Gasket 9 Bolt - 650cc Triumph twins 1963 & up OEM # 70-4547
7 reviews $33.96

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

Grant Piston Rings Piston Rings for Triumph 650 c.c. Motorcycles - STD
2 reviews $60.45

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

British Standard Pushrod Tube Seal Kit - Triumph 650
18 reviews $26.46

British Standard Outer Gearbox Gasket for unit 650cc and 750cc Triumph Motorcycles 1963 and Up OEM #71-1448
12 reviews $8.77

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

Kibblewhite Precision Machining Black Diamond Intake Inlet Valve Triumph 650 750 OEM # 70-4603
3 reviews $31.01

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

British Standard Rotor Key - Triumph Unit 650 750
2 reviews $8.37

Kibblewhite Precision Machining Connecting Rod Wrist Pin Bushing for 650/750 Triumph 1963 - 1983 OEM # 70-0459
3 reviews $16.50

Lowbrow Customs Triumph Oil Feed Brass Rocker Box Acorn Nuts and Copper Washers
18 reviews $28.93

British Standard Sludge Tube for your 650cc 750cc Triumph Motorcycle OEM # 70-3903
6 reviews $27.52

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

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

British Standard Points Cover Gasket Triumph Twins and Singles
8 reviews $5.30

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

British Standard Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
$8.19

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

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