Motorcycle Engine
James Gaskets
Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
$40.59
Colony
#9797-20 Front Motor Mount Kit Allen Head 1957-1985 Harley-Davidson Sportster - Chrome Plated
$59.38
Colony
#9213-4 Upper Inner Pushrod Covers 1979-Up Harley-Davidson Shovelhead 1984-Up Evo 1986-1990 XL
1
$39.11
British Standard
Rocker Box Caps / Covers - Starburst MCM Style - for Triumph Motorcycles 1963 - 1972
6
$115.15
James Gaskets
Complete Motor Gasket Kit - Sportster 900cc 1957 - 1971
1
$114.43
Colony
#9100-8 Cylinder Base Nut Set 1978-1984 Harley-Davidson Shovelhead OEM #16838-78 - Chrome Plated
2
$22.75
Kibblewhite Precision Machining
Tappet Blocks 1969- 1983 for Triumph 650 / 750 Twins OEM #E9352 E9353
2
$99.99
Colony
#8860-8 Cylinder Base Stud Spacer 1978-1984 Harley-Davidson Shovelhead OEM #16836-78 - Chrome Plated
1
$24.98
British Standard
Triumph 650 Head Bolt Set 1963 - 1970 OEM #70-0327
8
$99.90
Gasbox
Top Motor Mount - 2007-up Harley-Davidson Sportster - With EFI Coil and Stock Ignition Switch Mounts
11
$49.95
Kibblewhite Precision Machining
Connecting Rod Wrist Pin Bushing for 650/750 Triumph 1963 - 1983 OEM #70-0459
3
$16.50
Colony
#9521-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Chrome Plated
$47.80
Colony
#2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23
$6.05
British Standard
Side Cover Allen Hardware Set - Stainless- Triumph 650 c.c. Motorcycles 1963 - 1968
12
$44.47
British Standard
Triumph Crankshaft Main Bearing - Right Side OEM #70-1591
3
$88.43
British Standard
Engine and Transmission Lock Tab Set - 1963 - 1972 Triumph 650 with 4 Speed Gearbox
14
$22.95
Lowbrow Customs
FiltroMax Big Twin Bracket - Polished
10
$29.18
British Standard
Triumph Cylinder Base Nut Set Unit 650cc 1969-1972 OEM #S692 21-0692
6
$26.59
Cometic Gasket Inc.
Cam Change Gasket Kit - 1970-92 Harley-Davidson Big Twin
$26.20
Kibblewhite Precision Machining
Valve Guide Intake Exhaust Standard Size Manganese Bronze Triumph 650
3
$19.44
Colony
#7515-4 Aluminum Pushrods for Hydraulic Lifters - 1953-1965 Harley-Davidson Harley-Davidson Panhead
1
$71.50
James Gaskets
Primary Cover Gasket 1967-1976 Harley-Davidson XL
$6.73
Cycle Standard
Front Motor Mount 1982-94 Harley-Davidson FXR 80-08 FLH FLT
$33.19
Colony
#7603-4 Lower Motor Mount Kit Acorn Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
6
$31.87
Kibblewhite Precision Machining
Black Diamond Exhaust Valve Triumph 650 750 OEM #70-2904
3
$31.01
Kibblewhite Precision Machining
Black Diamond Intake Inlet Valve Triumph 650 750 OEM #70-4603
3
$31.01
Lowbrow Customs
FiltroMax Big Twin Bracket - Black
3
$30.86
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.