Motorcycle Engine
Colony
#2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2
$20.85
Colony
#8931-16 Rocker Cover Allen Head Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3
$20.85
Colony
#7629-14 High Crown Acorn Rocker Box Bolt Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
$62.27
Grant Piston Rings
Piston Rings for Triumph 650 c.c. Motorcycles - .060 over
$62.26
Colony
#8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34
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
British Standard
Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
3
$9.01
British Standard
Triumph Cylinder Base Nut Set Unit 650cc 1969-1972 OEM #S692 21-0692
6
$26.59
Colony
#9927-28 Upper & Lower Motor Mounting Allen Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$49.25
British Standard
Timing Cover Gasket for unit Triumph Motorcycles OEM #71-7263
8
$9.67
Colony
#9833-24 Rocker Cover Allen Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3
$23.91
Colony
#9521-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Chrome Plated
$47.80
Colony
#2280-16 Rocker Cover 12 Point Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
$23.01
Colony
#9616-4 Rear Stand Mounting Kit 1938-1957 Harley-Davidson Big Twins 1939-Up 45s - Chrome Plated
$22.80
Colony
#9751-11-P Cam Cover Smooth Allen Screw Kit 1986-Up Harley-Davidson Sportster - Chrome Plated
$21.66
Colony
#8790-28-P Rocker Box Smooth Allen Bolt Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
2
$38.59
James Gaskets
Primary Cover Gasket 1977-1990 Harley-Davidson XL
$12.18
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.