Motorcycle Engine
Colony
#9944-24 Rocker Box Mounting Allen Kit 1999-Up Twin Cam Dyna/FLT 2000-Up Softail - Chrome Plated
2
$19.36
Colony
#8783-8-P Cam Cover Smooth Allen Screw Kit 1971-1985 Harley-Davidson Sportster - Chrome Plated
1
$18.62
Colony
#7130-10 Circuit Breaker & Relay Screw Kit - 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$17.22
British Standard
Inner Gearbox Gasket for Unit 650 and 750 Triumph Motorcycles OEM #57-7012 or 71-3096
8
$8.69
Colony
#8103-16 Lifter Base Screw Kit 1936-1953 Harley-Davidson Big Twin & 1937-1973 45's - CAD Plated
$16.35
Colony
#9834-8 Chrome Countersink Washer Set for 1/4" Flat Head Socket Harley-Davidson - Chrome Plated
$15.14
British Standard
OIF Sump Gasket Triumph T140 750 A65 TR6 TR7
2
$7.42
Colony
#8704-2 Tappet Oil Screen Plug 1952-1965 Harley-Davidson Big Twin OEM #24987-52 - Chrome Plated
1
$13.55
Colony
#9793-9-P Upper Motor Mount Smooth Allen Kit 1986-2003 Harley-Davidson Sportster - Chrome Plated
$13.40
Colony
#3049-7 Chain Oiler Adjusting Screw Kit 1932-E1950 Harley-Davidson Twins 1932-1957 45's - Parkerized
$12.09
British Standard
Rotor Key - Triumph Unit 650 750
3
$10.74
British Standard
Ignition Pillar Bolt - Triumph / BSA
7
$9.94
Colony
#8782-4-P Lifter Base Smooth Allen Screw Kit 1957-1990 Harley-Davidson Sportster - Chrome Plated
2
$9.56
Colony
#2286-1 Sprocket Shaft and Pinion Gear Shaft Nut 1936-E1981 Harley-Davidson Big Twins - Parkerized
$8.80
Colony
#8784-4-P Sprocket Cover Smooth Allen Screw Kit 1971-1976 Harley-Davidson Sportster - Chrome Plated
$7.82
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.