Motorcycle Engine
Colony
#3375-3 Left Bearing Bushing Screw 1929-1936 Harley-Davidson 45"/74"/80" Twins/C Singles Twins
$19.06
Colony
#3772-2 Spark Plug Hole Caps 1926-1934 Harley-Davidson Singles 1929-1955 Flatheads All Knuckleheads
$16.50
S&S Cycle
Hooligan Kit - 1200cc to 1250cc for 2000 - 2021 Harley-Davidson Sportster Models - Wrinkle Black
$1,640.66
$1,822.95
British Standard
Crankcase Oil Filter 1969-79 Triumph 650 750 T140 TR7 T120 TR6
3
$61.67
James Gaskets
Top End Gasket Kit 1957-1971 Harley-Davidson Sportster
2
$37.10
Colony
#3058-10 Rear Motor Mount & Sprocket Cover Mounting Kit 1983-1985 Harley-Davidson XL - Zinc Plated
$27.50
Colony
#1028-P Complete Show Bike Kit Polished Allen 2017-Up Harley-Davidson Touring Models - Chrome Plated
$245.03
James Gaskets
Cam Change Gasket Kit with Metal Cam Cover Gasket - 1993-99 Harley-Davidson 80 inch Big Twin
$36.14
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.