Motorcycle Engine
Colony
#9840-8 Chrome OEM Style Rocker Shaft End Nut 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$9.16
Colony
#9821-4 Oil Filter Adaptor Mounting Allen Kit 1992-Up Harley-Davidson Big Twin - Chrome Plated
1
$4.76
Colony
#8218-36 Head Bolt Kit 1940-Up Harley-Davidson 1930-1947 Flathead 74 & 80 Iron Heads - Chrome Plated
$123.48
Colony
#8700-2 Oil Pump Relief Valve Plug 1968-1980 Harley-Davidson Big Twins OEM #26377-68 - Chrome Plated
$15.52
Colony
#8704-2 Tappet Oil Screen Plug 1952-1965 Harley-Davidson Big Twin OEM #24987-52 - Chrome Plated
1
$13.55
Colony
#8772-2 Timing Cover Oil Passage Bolt 1963-1969 Harley-Davidson Big Twin OEM #25218-63 - CAD Plated
$11.96
Colony
#8630-1 Rocker Feedline Nipple 1936-1941 Harley-Davidson OHV 1937-1952 45's Vent Line - CAD Plated
1
$8.78
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.