Motorcycle Engine
Colony
#3452-4 Rocker Plate Stud Bushings 1913-1929 Harley-Davidson All Models 1930-1934 21" Singles
$35.20
Colony
#3447-7 Oversized Cylinder Head Stud Kit 1926-1932 Harley-Davidson A & B Singles - Parkerized
$46.20
Colony
#8309 CAD Complete Stock Hardware Kit - 1937-1973 Harley-Davidson 45 with Aluminum Head - CAD Plated
$328.94
Colony
#8306 CAD Complete Stock Hardware Kit - 1940-1948 Harley-Davidson 74 & 80 Aluminum Head - CAD Plated
$339.82
Colony
#8315 CHR Complete Stock Hardware Kit - 1957-1966 Harley-Davidson Sportster XL/XLH - Chrome Plated
$273.26
Colony
#8315 CAD Complete Stock Hardware Kit - 1957-1966 Harley-Davidson Sportster XL/XLH - CAD Plated
$247.50
Colony
#7709-32 Head Nut & Washer Kit 1942-Up Harley-Davidson 45's with Cast Iron Heads & 3/8-16 Head Studs
$40.56
Colony
#7629-14 High Crown Acorn Rocker Box Bolt Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
$62.27
Colony
#7152-20 Heat Treated Acorn Head Bolt Kit - 1936-1939 Harley-Davidson Knucklehead - Chrome Plated
$66.63
Colony
#7130-10 Circuit Breaker & Relay Screw Kit - 1936-1957 Harley-Davidson Big Twins - Chrome Plated
$17.22
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.