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.

Special Motorcycle Engine

Sort by

Colony #9854-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $49.25

Colony #9110-9 Head Bolt Covers Acorn Head 1973-1984 Harley-Davidson XL - Chrome Plated
$49.97

Colony #9211-16 Head Bolt Set 12 Point 1973-1985 Harley-Davidson Sportster - Chrome Plated
2 reviews $56.49

Colony #9212-16 Head Bolt Set 12 Point 1973-1985 Harley-Davidson Sportster - CAD Plated
$45.27

Colony #9747-16 Head Bolt Allen Screw Kit 1957-1972 Harley-Davidson Sportster - Chrome Plated
$46.35

Colony #9859-20 Lower Motor Mount Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
$44.89

Colony #9522-22 Upper & Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - CAD Plated
$43.82

Colony #9855-28 Upper & Lower Motor Mount Kit 1984-1999 Harley-Davidson Softail - Zinc Plated
$42.00

Colony #9625-16 Lower Motor Mount Kit 1930-1936 Harley-Davidson VL All 45 's - Chrome Plated
$38.73

Colony #9847-9 Banjo Style Oil Feed Line Fitting Kit 1936-1941 Harley-Davidson Knucklehead - Chrome Plated
$37.66

Colony #9407-1 11/16"-16 Thread Repair Tap Harley-Davidson All Split Cases
$37.66

Colony #9860-20 Lower Motor Mount Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS
$36.94

Colony #9698-18 Head Bolt Washer Kit 1940-1947 Harley-Davidson 45/74/80 Alloy Head - Parkerized
$33.31

Colony #9626-16 Lower Motor Mount Kit 1930-1936 Harley-Davidson VL All 45 's - Parkerized
$32.95

Colony #9831-28 Rocker Box Screw Hex Head Kit 1977-1985 Harley-Davidson Sportster - Chrome Plated
1 review $31.14

Colony #9829-28 Rocker Box Screw Kit 1957-1976 Harley-Davidson Sportster - Chrome Plated
$31.14

Colony #9848-9 Banjo Style Oil Feed Line Fitting 1936-1941 Harley-Davidson Knucklehead - CAD Plated
$29.70

Colony #9694-19 Oil Pump Mounting Kit 1936-1967 Harley-Davidson OHV Big Twin - Parkerized
2 reviews $27.50

Colony #9830-28 Rocker Box Screw Kit 1957-1976 Harley-Davidson Sportster - CAD Plated
$25.84

Colony #9827-12 Timing Cover Allen Screw Kit 1/4-20 1936-1970 Harley-Davidson After Market Cases - Chrome Plated
1 review $24.62

Colony #9794-12 Timing Cover Screw Kit 1/4-20 After Market Harley-Davidson Cases - Chrome Plated
$24.20

Colony #9416-4 Spring Retainer & Hex Nut Set 1930-1935 Harley-Davidson VL/RL - Chrome Plated
$21.52

Colony #9699-12 Rocker Box Mounting Kit 1936-1947 Harley-Davidson Knucklehead - Parkerized
$19.51

Colony #9417-4 Spring Retainer & Hex Nut Set 1930-1935 Harley-Davidson VL/RL - Parkerized
$19.93

Colony #9796-12 Timing Cover Screw Kit 1/4-20 After Market Harley-Davidson Cases - Parkerized
$21.30

Colony #9836-5 Chrome Countersink Washer Set for 3/8" Flat Head Socket Harley-Davidson - Chrome Plated
1 review $16.73

Colony #9101-8 Cylinder Base Nut Set Zinc 1978-1984 Harley-Davidson Shovelhead OEM# 16838-78 - Zinc Plated
1 review $20.35

Colony #9773-8 Center Motor Mount Kit Acorn Nut 1986-2003 Harley-Davidson Sportster - Chrome Plated
$16.73

Colony #9762-16 Oil Pump Mounting Kit Allen 1992-Up Harley-Davidson Big Twin - Chrome Plated
1 review $16.38

Colony #9834-8 Chrome Countersink Washer Set for 1/4" Flat Head Socket Harley-Davidson - Chrome Plated
$15.14

Colony #9607-2 Oil Pump Relief Valve Plug 1968-1980 Harley-Davidson Big Twin - Chrome Plated
$15.14

Colony #9814-16 Lifter Base Screw Kit 1/4-20 Harley-Davidson Aftermarket Case - Chrome Plated
1 review $17.69

Colony #9766-4 Lifter Base Acorn Screw Kit 1995-Up Harley-Davidson Sportster - Chrome Plated
$14.34

Colony #9721-2 Cylinder Head Bolt Spacers 1937-1973 Harley-Davidson 45's - Parkerized
$13.94

Colony #9779-5 Top Motor Mount Hardware Kit 1932-Up Harley-Davidson 45's - Chrome Plated
$13.55

Colony #9523-1 Oil Pump Check Valve Plug 1936-1980 Harley-Davidson Big Twin 1937-Up UL/45s - Chrome Plated
2 reviews $12.74

Colony #9526-1 Oil Pump Bypass Valve Plug 1936-1952 Harley-Davidson Big Twin 1937-Up UL/45s - Chrome Plated
$11.96

Colony #9305-7 Timing Cover Screw Kit 1970-1980 Harley-Davidson Shovelhead - Chrome Plated
1 review $12.10

Colony #9819-12 Timing Cover Allen Screw Kit 1993-Up Harley-Davidson Big Twin - Chrome Plated
1 review $11.90

Colony #9608-2 Oil Pump Relief Valve Plug 1968-1980 Harley-Davidson Big Twins - CAD Plated
2 reviews $11.14

Colony #9103-4 Shift Rod End Bolt Kit 1936-1954 Harley-Davidson Handshift 1951-1964 Foot Shift - Chrome Plated
$11.56

Colony #9606-2 Oil Pump Relief Valve Plug 1954-1967 Harley-Davidson Big Twin - CAD Plated
$11.14

Colony #9781-5 Top Motor Mount Hardware Kit 1932-Up Harley-Davidson 45's - Parkerized
1 review $10.37

Colony #9527-1 Oil Pump Bypass Valve Plug 1936-1952 Harley-Davidson Big Twin 1937-Up UL/45s - CAD Plated
$9.56

Colony #9787-12 Oil Pump Mounting Kit Stock 1978-1991 Harley-Davidson Big Twins - Zinc Plated
$8.78

Colony #9840-8 Chrome OEM Style Rocker Shaft End Nut 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$9.16

Colony #9760-4 Lifter Base Allen Screw Kit 1995-Up Harley-Davidson Sportster - Chrome Plated
$8.36

Colony #9645-2 Oil Screen Plug 1981-Up Harley-Davidson FL/FX - CAD Plated
$7.96

Colony #9414-8 Circuit Breaker & Relay Screw Kit 1937-1973 Harley-Davidson 45's - Chrome Plated
$7.58

Colony #9403-1 Timing Plug 1970-Up Harley-Davidson OEM# 720 - CAD Plated
3 reviews $9.35

Colony #9615-10 Oil Pump Mounting Kit Late 1971-1976 Harley-Davidson Sportster - CAD Plated
$7.17

Colony #9704-10 Cylinder Head Bolt Washers 1936-Up Harley-Davidson - Parkerized
$6.78

Colony #9841-8 Rocker Shaft End Nut Kit 1936-1947 Harley-Davidson Knucklehead - CAD Plated
$6.38

Colony #9415-8 Circuit Breaker & Relay Screw Kit 1937-1973 Harley-Davidson 45's - CAD Plated
$5.96

Colony #9717-1 Starter Crank Pin Stud 1936-Up Harley-Davidson Big Twin - Parkerized
$5.18

Colony #9821-4 Oil Filter Adaptor Mounting Allen Kit 1992-Up Harley-Davidson Big Twin - Chrome Plated
1 review $4.76

Colony #8218-36 Head Bolt Kit 1940-Up Harley-Davidson 1930-1947 Flathead 74 & 80 Iron Heads - Chrome Plated
$123.48

Colony #8136-34 Motor Case Kit Acorn Head 1965-1969 Harley-Davidson Big Twin - Chrome Plated
1 review $63.61

Colony #8139-34 Motor Case Kit Acorn Head 1970-1978 Harley-Davidson Shovelhead - Chrome Plated
$63.61

Colony #8944-16 Head Bolt Set 1957-1972 Harley-Davidson Sportster - Chrome Plated
$62.65

Colony #8945-16 Head Bolt Set 1957-1972 Harley-Davidson Sportster - CAD Plated
$51.78

Colony #8129-34 Motor Case Kit Stock 1936-1939 Harley-Davidson Knucklehead - CAD Plated
1 review $51.70

Colony #8144-34 Motor Case Kit Stock 1979-1995 Harley-Davidson Shovelhead/Evo - CAD Plated
$51.70

Colony #8141-34 Motor Case Kit Stock 1970-1978 Harley-Davidson Shovelhead - CAD Plated
$51.70

Colony #8135-34 Motor Case Kit Stock 1948-1964 Harley-Davidson Panhead - CAD Plated
2 reviews $51.70

Colony #8132-34 Motor Case Kit Stock 1940-1947 Harley-Davidson Knucklehead - CAD Plated
$51.70

Colony #8734-24 Valve Cover Screws 45/64 inch Long 1954-1965 Harley-Davidson Panhead With Steel D-Rings - Chrome Plated
$41.97

Colony #8143-34 Motor Case Kit Stock 1979-1995 Harley-Davidson Shovelhead/Evo - Chrome Plated
$58.30

Colony #8140-34 Motor Case Kit Stock 1970-1978 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $58.30

Colony #8137-34 Motor Case Kit Stock 1965-1969 Harley-Davidson Big Twin - Chrome Plated
2 reviews $58.30

Colony #8134-34 Motor Case Kit Stock 1948-1964 Harley-Davidson Panhead - Chrome Plated
2 reviews $58.30

Colony #8131-34 Motor Case Kit Stock 1940-1947 Harley-Davidson Knucklehead - Chrome Plated
$58.30

STAY CONNECTED
WITH LOWBROW

NO SPAM, EVER. JUST GREAT STUFF. YOUR INFO IS NEVER SHARED.