Motorcycle Engine
Colony
#8860-8 Cylinder Base Stud Spacer 1978-1984 Harley-Davidson Shovelhead OEM #16836-78 - Chrome Plated
1
$24.98
James Gaskets
Primary Cover Gasket 1952-1969 Harley-Davidson XL
$12.32
Colony
#8819-4 Clutch & Brake Lever Pivot Screw Kit 1941-1964 Harley-Davidson Big Twin/45s - CAD Plated
1
$12.10
Colony
#8931-16-P Rocker Cover Smooth Allen Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01
Colony
#2280-16 Rocker Cover 12 Point Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01
Colony
#9100-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM #16838-78 - Chrome Plated
2
$22.75
Colony
#2650-13 Top Motor Mount Hardware 1957-E1972 Harley-Davidson XL 1952-1972 Big Twin - Parkerized
1
$21.78
Colony
#9983-3 Shifter Cam Plunger Kit 1936-1976 Harley-Davidson Big Twin 1940-1973 45s - Parkerized
$21.73
Colony
#9751-11-P Cam Cover Smooth Allen Screw Kit 1986-Up Harley-Davidson Sportster - Chrome Plated
$21.66
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
British Standard
Rotor Key - Triumph Unit 650 750
3
$10.13
James Gaskets
Points Cover Gasket 1971-1978 Harley-Davidson Big Twin
2
$1.34
Colony
#8102-16 Lifter Base Screw Kit 1936-1953 Harley-Davidson Big Twin & 1937-1973 45's - Chrome Plated
$19.25
Colony
#8783-8-P Cam Cover Smooth Allen Screw Kit 1971-1985 Harley-Davidson Sportster - Chrome Plated
1
$18.62
Colony
#3549-5 Inner Primary to Motor Seals 2006-Up Harley-Davidson Dyna 2007-Up Softail/Touring Models
1
$9.08
Colony
#8729-12 Rubberized Cork Pushrod Cover Seals 1957-1979 Harley-Davidson XL 1936-1947 Knucklehead
1
$9.08
Colony
#7130-10 Circuit Breaker & Relay Screw Kit - 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$17.22
Colony
#9836-5 Chrome Countersink Washer Set for 3/8" Flat Head Socket Harley-Davidson - Chrome Plated
1
$16.73
Colony
#9835-8 Chrome Countersink Washer Set for 5/16" Flat Head Socket Harley-Davidson - Chrome Plated
$16.73
British Standard
Rocker Cover Washers - 4 Pack - Triumph Unit 500 650
5
$8.31
Colony
#2948-3 Circuit Breaker Mounting Clamp & Stud Kit 1966-1969 Harley-Davidson FL/FLH - CAD Plated
1
$15.73
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.