Motorcycle Engine
Colony
#8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
2
$58.66
Colony
#2011-8 Head Bolt Set 12 Point 1985-1991 Harley-Davidson Big Twin 1986-1992 XL - Chrome Plated
2
$109.99
Colony
#2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23
$6.05
Kibblewhite Precision Machining
Intake and Exhaust Valve Spring Set for 1963 - 1972 Triumph 650 Motorcycles OEM #99-7037 70-4221 or 70-7400
1
$54.24
Colony
#2313-19 Upper and Lower Motor Mount Bolt Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
2
$52.45
Cycle Standard
Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$109.89
Kibblewhite Precision Machining
Tappet Blocks 1969- 1983 for Triumph 650 / 750 Twins OEM #E9352 E9353
2
$99.99
British Standard
Triumph 650 Head Bolt Set 1963 - 1970 OEM #70-0327
8
$106.89
British Standard
Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3
$46.65
James Gaskets
Top End Gasket Kit 1973-1985 Harley-Davidson Sportster
5
$42.03
Colony
#8931-16 Rocker Cover Allen Head Screw Kit 1985-Up Harley-Davidson FL/FX 1986-Up XL - Chrome Plated
3
$20.85
Gasbox
Strong Arm Top Motor Mount With OEM #71425-77 Ignition Switch Mount 1948-1984 Harley Big Twins
2
$74.95
Lowbrow Customs
Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style - 1963 - 1970 Triumph
13
$74.20
Colony
#2070-1 Oil Line Fitting Chrome 1/8 NPT Thread for 3/8 inch Hose OEM #63533-41 - Chrome Plated
6
$4.54
Kibblewhite Precision Machining
Connecting Rod Wrist Pin Bushing for 650/750 Triumph 1963 - 1983 OEM #70-0459
3
$16.50
Colony
#7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6
$31.87
Colony
#2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2
$20.85
Grant Piston Rings
Piston Rings for Triumph 650 c.c. Motorcycles - .020 over
$66.62
Colony
#9797-20 Front Motor Mount Kit Allen Head 1957-1985 Harley-Davidson Sportster - Chrome Plated
$59.38
Colony
#8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34
Colony
#8777-20 Head Bolt Allen Screw Kit 1948-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
$57.94
British Standard
Outer Gearbox Gasket for unit 650cc and 750cc Triumph Motorcycles 1963- Up OEM #71-1448
13
$10.62
Colony
#9960-1 Oversize Plated Allen Timing Plug 11/16"-16 Threads Harley-Davidson OEM #720 - Chrome Plated
3
$9.56
Colony
#2745-2 Oversized Ignition Timer Cover Stud Kit 1972-1979 Harley-Davidson Big Twin - Zinc Plated
$13.92
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.