Motorcycle Engine
Gasbox
Strong Arm Top Motor Mount With OEM #71425-77 Ignition Switch Mount 1948-1984 Harley Big Twins
1
$74.95
James Gaskets
Primary Cover & Inspection Cover Gasket Kit With Seals 1984-1986 Harley-Davidson FL/FLH/FX/FXE/FXWG 1984-1988 Softail
$68.87
Cycle Standard
Isolator Motor Mount - Rear - 1999-2017 Harley-Davidson Dyna
2
$129.17
Colony
#8316 CAD Complete Stock Hardware Kit - 1957-1969 Harley-Davidson Sportster XLCH - CAD Plated
2
$248.60
James Gaskets
Top End Gasket Kit 2007-Up Harley-Davidson Sportster
$119.93
Colony
#3092-24 Valve Spring Cover Kit 1937-1938 Harley-Davidson Big Twin Side Valve - Chrome Plated
$231.00
Lowbrow Customs
Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style w/ Key Switch Hole - 1963 - 1970 Triumph
13
$69.35
Grant Piston Rings
Piston Rings for Triumph 650 c.c. Motorcycles - .060 over
$62.26
Colony
#8714-20 Big Bore Headbolt & Washer Kit 1949-Up Harley-Davidson Panhead/Shovelhead - Chrome Plated
2
$58.66
Colony
#2667-22-P Lower Motor Mount Allen Bolt Kit 1999-2003 Harley-Davidson Sportster - Chrome Plated
3
$35.87
Lowbrow Customs
Rocker Box Oil Pressure Gauge Adapter Fitting - Brass - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
8
$27.74
Lowbrow Customs
Rocker Box Oil Pressure Gauge Adapter Fitting - Chrome - 1971 - Up Harley-Davidson Shovelhead, 1971 - 1985 Sportster
9
$27.74
Kibblewhite Precision Machining
Chrome Moly Pushrods for 650cc Triumph Twins Race or Street Use
11
$80.30
British Standard
Engine Oil Seal Kit - 7 Piece - 1963 - 1972 Triumph Unit 650
21
$52.70
Colony
#2313-19 Upper and Lower Motor Mount Bolt Kit 1936-1969 Harley-Davidson Big Twin - Parkerized
2
$52.45
Colony
#2370-8 Cylinder Head Motor Brace Mounting Kit 1966-1984 Harley-Davidson Shovelhead - CAD Plated
2
$20.85
Colony
#9772-22-P Lower Motor Mount Smooth Allen Kit 1986-1998 Harley-Davidson Sportster - Chrome Plated
1
$35.87
Colony
#2091-12 Replacement Pushrod Covers Late 1979-1984 Harley-Davidson Shovelhead - Chrome Plated
2
$70.39
Colony
#3126-36 Pushrod Cover Kit for Adjustable Pushrods 1999-Up Harley-Davidson Twin Cam - Chrome Plated
$140.00
British Standard
Pushrod Tube Seal Kit - Triumph 650
18
$27.78
Lowbrow Customs
Rear Motor Mount Plates for Triumph Motorcycles - Chopper Style - 1963 - 1970 Triumph
13
$69.35
James Gaskets
Primary Cover & Inspection Cover Gasket Kit 8-Hole Primary Cover 1970-1982 Harley-Davidson Shovelhead
$68.87
Old-Stf Cycle
Ironhead Sportster Rocker Box Loop Oil Lines - Brass
14
$64.00
British Standard
Rocker Cap/Valve Cover Set Triumph 350 500 650 Unit Twins
3
$42.41
James Gaskets
Top End Gasket Kit 1973-1985 Harley-Davidson Sportster
5
$42.03
Grant Piston Rings
Piston Rings for Triumph 650 c.c. Motorcycles - .020 over
$62.26
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.