Motorcycle Engine
Lowbrow Customs
Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
9
$30.51
Lowbrow Customs
FiltroMax Big Twin Bracket - Tumbled
11
$32.10
Gasbox
Top Motor Mount - 2007-up Harley-Davidson Sportster - With EFI Coil and Stock Ignition Switch Mounts
11
$49.95
Gates Corporation
5/16 inch Black Fuel / Oil Line - By The Foot
11
From
$11.18
Colony
#8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
2
$58.66
James Gaskets
Primary Cover Gasket 1965-1988 Harley-Davidson Big Twin
$24.91
Lowbrow Customs
FiltroMax Big Twin Bracket - Black
3
$39.45
Colony
#2313-19 Upper and Lower Motor Mount Bolt Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
2
$52.45
Lowbrow Customs
Rocker Box Oil Pressure Gauge Adapter Fitting - Brass - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
8
$30.51
British Standard
Triumph Oil Seal Timing Cover Points Seal OEM #70-4568
12
$16.02
Colony
#2667-22-P Lower Motor Mount Allen Bolt Kit 1999-2003 Harley-Davidson Sportster - Chrome Plated
3
$35.87
Colony
#9772-22 Lower Motor Mount Allen Screw Kit 1986-1998 Harley-Davidson Sportster - Chrome Plated
1
$33.84
Lowbrow Customs
Triumph Oil Feed Brass Rocker Box Acorn Nuts and Copper Washers
18
$33.42
Colony
#8225-8 Rocker Shaft End Plug & Cap Kit 1971-Up Harley-Davidson Shovelhead 1971-1985 XL - CAD Plated
2
$31.81
Colony
#2233-12 Rocker Arm Shaft Washer O-Ring Kit 1966-1984 Harley-Davidson Shovelhead 1957-1984 XL
23
$6.05
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
Colony
#2231-4 Tappet Anti-Rotation Allen Screw Kit 2000-Up Harley-Davidson Sportster - Chrome Plated
5
$20.31
James Gaskets
Top End Gasket Kit 2007-Up Harley-Davidson Sportster
$119.93
British Standard
Engine Oil Seal Kit - 7 Piece - 1963 - 1972 Triumph Unit 650
21
$56.39
Cycle Standard
Isolator Motor Mount - Rear - 1991-1998 Harley-Davidson Dyna
$109.89
Gates Corporation
1/4 inch Black Fuel / Oil Line - By The Foot
10
From
$10.59
British Standard
Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3
$46.65
Colony
#7604-7 Upper Motor Mount Kit Acorns Nut 1936-1984 Harley-Davidson OHV Big Twins - Chrome Plated
4
$21.52
James Gaskets
Top End Gasket Kit 1948-1965 Harley-Davidson Panhead
2
$40.59
Kibblewhite Precision Machining
Chrome Moly Pushrods for 650cc Triumph Twins Race or Street Use
11
$80.30
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.