Motorcycle Engine
Colony
#8729-12 Rubberized Cork Pushrod Cover Seals 1957-1979 Harley-Davidson XL 1936-1947 Knucklehead
1
$9.08
James Gaskets
Primary Cover Gasket 1952-1969 Harley-Davidson XL
$8.87
British Standard
Triumph Oil Seal-Timing Cover Points Seal- OEM part# 70-4568
12
$13.24
Lowbrow Customs
Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1966 - 1970 Harley-Davidson Shovelhead, 1957 - 1970 Sportster
2
$26.42
Colony
#8736-24 Valve Cover Screws 1954-1965 Harley-Davidson Panhead With Steel D-Rings - Chrome Plated
$24.71
Colony
#2650-13 Top Motor Mount Hardware 1957-E1972 Harley-Davidson XL 1952-1972 Big Twin - Parkerized
1
$21.78
Colony
#8438-16 Cylinder Base High Crown Cap Nut Set 1957-1985 Sportster 1969-Up Triumph - Chrome Plated
$21.60
Colony
#2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2
$20.85
Colony
#2368-8 Cylinder Head Motor Brace Mounting Kit 1948-1965 Harley-Davidson Panhead - Parkerized
$20.85
Colony
#9102-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM# 16838-78 - Black Oxide
2
$20.35
Colony
#9944-24 Rocker Box Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
1
$19.36
Colony
#9960-1 Oversize Plated Allen Timing Plug 11/16"-16 Threads Harley-Davidson OEM# 720 - Chrome Plated
1
$9.56
British Standard
Outer Gearbox Gasket for unit 650cc and 750cc Triumph Motorcycles 1963 and Up OEM #71-1448
12
$8.77
British Standard
Rotor Key - Triumph Unit 650 750
2
$8.37
Colony
#9835-8 Chrome Countersink Washer Set for 5/16" Flat Head Socket Harley-Davidson - Chrome Plated
$16.73
Colony
#8103-16 Lifter Base Screw Kit 1936-1953 Harley-Davidson Big Twin & 1937-1973 45's - CAD Plated
$16.35
British Standard
Points Cover Gasket Triumph Twins and Singles
8
$5.30
British Standard
Ignition Pillar Bolt - Triumph / BSA
7
$7.60
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.