Motorcycle Engine
Colony
#9728-36 Head Bolt Set 1940-Up Harley-Davidson Flathead 45 1930-1947 74/80 Iron Head - Parkerized
4
$97.04
British Standard
Rocker Box Caps / Covers - Starburst MCM Style - for Triumph Motorcycles 1963 - 1972
5
$111.80
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
$21.49
James Gaskets
Top End Gasket Kit 1973-1985 Harley-Davidson Sportster
2
$42.03
British Standard
Side Cover Allen Hardware Set - Stainless- Triumph 650 c.c. Motorcycles 1963 - 1968
12
$42.35
James Gaskets
Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
$40.59
British Standard
Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3
$40.39
British Standard
Timing Cover Gasket for unit Triumph Motorcycles OEM #71-7263
8
$8.79
Cometic Gasket Inc.
Cam Change Gasket Kit - 1993-99 Harley-Davidson Big Twin
$26.20
James Gaskets
Cam Change Gasket Kit with Metal Cam Cover Gasket - 1993-99 Harley-Davidson 80 inch Big Twin
$36.14
Colony
#9772-22-P Lower Motor Mount Smooth Allen Kit 1986-1998 Harley-Davidson Sportster - Chrome Plated
1
$35.87
Colony
#8204-4 Hydraulic Lifter Converters Eliminate Hydraulic Units 1953-Up Harley-Davidson Big Twins
$34.05
Colony
#2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
21
$6.05
British Standard
Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
$8.19
Colony
#8777-20-P Smooth Allen Head Bolt Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
$62.27
Grant Piston Rings
Piston Rings for Triumph 650 c.c. Motorcycles - STD
2
$60.45
British Standard
Triumph Patent Plate with Rivets
7
$16.01
Colony
#2369-8 Cylinder Head Motor Brace Mounting Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
6
$19.48
British Standard
Allen Sludge Trap Plug for your Triumph Motorcycle
9
$22.33
Colony
#7352-16 Heat Treated Acorn Head Bolt Kit Late 1973-1985 Harley-Davidson Sportster - Chrome Plated
$57.94
Colony
#8164-19 Upper And Lower Motor Mount Kit 1936-1969 Harley-Davidson Big Twin OHV - Chrome Plated
5
$57.53
James Gaskets
Primary Cover & Inspection Cover Gasket Kit 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$55.23
James Gaskets
Primary Cover Gasket 1977-1990 Harley-Davidson XL
$8.84
Lowbrow Customs
Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style - 1963 - 1970 Triumph
13
$66.05
Cometic Gasket Inc.
Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20
The Heart of Your Build: Custom Motorcycle Engine Parts
The engine is the soul of your motorcycle, and keeping it running strong is what it's all about. Whether you're rebuilding a classic ironhead motor for sale you just scored or boosting the pe...
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Motorcycle Engine FAQ
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.