Motorcycle Engine
Colony
#2369-8 Cylinder Head Motor Brace Mounting Kit 1948-1965 Harley-Davidson Panhead - CAD Plated
6
$19.48
Colony
#9960-1 Oversize Plated Allen Timing Plug 11/16"-16 Threads Harley-Davidson OEM #720 - Chrome Plated
3
$9.56
Colony
#9847-9 Banjo Style Oil Feed Line Fitting Kit 1936-1941 Harley-Davidson Knucklehead - Chrome Plated
$37.66
James Gaskets
Top End Gasket Kit 1957-1971 Harley-Davidson Sportster
3
$37.10
James Gaskets
Primary Cover Gasket 1977-1990 Harley-Davidson XL
$12.18
Colony
#8789-28-P Rocker Box Smooth Allen Bolt Kit 1957-1976 Harley-Davidson Sportster - Chrome Plated
$33.50
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
$8.81
Colony
#3445-8 Rocker Shaft End Plug & Cap Nut Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 Sportster
2
$31.81
Colony
#8225-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - CAD Plated
2
$31.81
British Standard
Sludge Tube for your 650cc 750cc Triumph Motorcycle OEM #70-3903
7
$34.33
Colony
#8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34
British Standard
Triumph Cylinder Base Nut Set Unit 650cc 1969-1972 OEM #S692 21-0692
6
$31.01
James Gaskets
Primary Cover Gasket 1952-1969 Harley-Davidson XL
1
$12.32
Colony
#9771-8 Center Motor Mount Allen Screw Kit 1986-2003 Harley-Davidson Sportster - Chrome Plated
1
$11.90
Colony
#8931-16-P Rocker Cover Smooth Allen 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
#9751-11-P Cam Cover Smooth Allen Screw Kit 1986-Up Harley-Davidson Sportster - Chrome Plated
$21.66
Colony
#7018-16 High Crown Cylinder Base Nut Set - 1957-1985 Harley-Davidson Sportster - Chrome Plated
$21.60
Colony
#7604-7 Upper Motor Mount Kit Acorns Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
4
$21.52
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
Rocker Box Gaskets 1963-1970 Triumph 650cc T120 Bonneville/TR6/Tiger
3
$10.70
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.