Which models are considered Big Twins?

Big Twins refer to larger displacement Harley-Davidsons, including Flathead, Knucklehead, Panhead, Shovelhead, Evo, and Twin Cam.

Do I need any special tools for installing custom Big Twin parts?

Basic hand tools usually suffice, but some installations (like welding) may require specialized equipment or professional assistance.

Can I return items if they don’t fit my Big Twin?

Absolutely. As long as the part is in original, unused condition, you can return it according to our standard return policy.

Harley-Davidson Big Twin Parts

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Colony #3046-3 Rocker Box Oil Feed Line Fittings 1942-1947 Harley-Davidson Knucklehead - Parkerized
$19.51

Colony #3021-2 Kick Starter Pedal Rubber Set 1917-Up Harley-Davidson OEM# 2092-17
$18.15

Colony #3068-30 Primary Cover Screw Kit 1956-1964 Harley-Davidson Big Twins - CAD Plated
1 review $25.00

Colony #3067-30 Primary Cover Screw Kit Harley-Davidson 1950-1955 Big Twins - CAD Plated
2 reviews $25.00

Colony #3005-2 Transmission Mainshaft Locknut 1915-1935 Harley-Davidson Big Twins
$17.60

Colony #3063-2 Hand Clutch Adjusting Screw 1952-1967 Harley-Davidson FL/FLH - CAD Plated
$13.31

Colony #1019-P Complete Show Bike Kit Smooth Allen Hardware 1987-1991 Harley-Davidson FLT/FXR - Chrome Plated
$234.50

Colony #3049-7 Chain Oiler Adjusting Screw Kit 1932-E1950 Harley-Davidson Twins 1932-1957 45's - Parkerized
$12.09

Colony #3003-3 Oil Line Banjo Bolt and Washer Kit 1936-1937 Harley-Davidson Knucklehead 1937 Flathead/Sidevalve
$11.50

Colony #1020-P Complete Show Bike Kit Smooth Allen Hardware 1992-1998 Harley-Davidson FLT/FXR - Chrome Plated
$230.23

Colony #3022-3 Front Axle Nut and Washer Kit 1972-Up Harley-Davidson Wideglides - CAD Plated
$9.68

Colony #3055-3 Gas Tank Shut Off Rod Spacer Kit 1940-1965 Harley-Davidson Big Twins/45's - CAD Plated
1 review $9.08

Colony #9937-20-P Front Motor Mount Kit Smooth Chrome Allen Harley Dyna 91-up — Colony #9937-20-P Front Motor Mount Smooth Allen Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
$20.27

Colony #9819-12-P Timing Cover Smooth Chrome Allen Bolt Kit Harley Big Twin 1993-up — Colony #9819-12-P Timing Cover Smooth Allen Bolt Kit 1993-Up Harley-Davidson Big Twin - Chrome Plated
$14.89

Colony #8820-9-P Transmission Side Cover Smooth Allen Screw Kit 1936-Up Harley-Davidson Big Twin 4 Speeds - Chrome Plated
$20.65

Colony #8754-2-P Generator Smooth Allen Screws 1958-1969 Harley-Davidson Panhead & Shovelhead - Chrome Plated
$13.55

Colony #8725-18 Handlebar Clamp Mount Kit Cap Bolts Kit 1983-Up Harley-Davidson FX/XL - Chrome Plated
$20.27

Colony #8451-5 Rear Star Hub Cap Screw Kit Harley-Davidson 74s With 1/4-24 Holes - Chrome Plated
$17.14

Colony #8447-8 Lifter Base Cap Screw Kit 1936-1975 Harley-Davidson OHV Big Twins - Chrome Plated
$25.71

Colony #8444-2 Generator Cap Screw Set Harley-Davidson 1936-57 Knuckle Pan - Chrome Plated
$13.94

Colony #2986-4 Spring Retainer Acorn Nut Set 1936-1938 Harley-Davidson Big Twin 1949-1957 45s - Chrome Plated
$21.45

Colony #8442-19 Transmission Side Cover Clutch Arm Cap Nut Kit Harley-Davidson Big Twin 36-84 - Chrome Plated
$24.71

Colony #8437-16 Cylinder Base High Crown Cap Nut Set 1930-1977 Harley-Davidson 74s - Chrome Plated
$21.66

Colony #8906-5-P Transmission Shifter Cover Smooth Allen Kit 1987 Harley-Davidson FX/FL - Chrome Plated
$11.90

Colony #2991-2 Generator Screw Kit Special 5/16 inch case holes Harley Big Twins 36-57 — Colony #2991-2 Special Generator Screw Kit 5/16 inch Case Holes 1936-1957 Harley-Davidson Big Twins - Parkerized
$12.10

Colony #2990-2 Generator Screw Kit CAD Special 5/16 inch case holes Harley Big Twins 36-57 — Colony #2990-2 Special Generator Screw Kit 5/16 inch Case Holes 1936-1957 Harley-Davidson Big Twins - CAD Plated
2 reviews $12.10

Colony #2980-11 Fender to Brace Rivets and Tool 1930-1979 Harley-Davidson All Models
2 reviews $20.57

Colony #2964-2 Generator Frame Screw Kit 1932-1957 Harley-Davidson Twins - Parkerized
$17.42

Colony #2962-6 Flat Top Brass Grease Fitting Alemite Pre-1938 Harley-Davidson - 3 Pack
$20.85

Colony #2957-2 Kick Starter Pedal Rubber Rod Kit 1917-Up Harley-Davidson - CAD Plated
$19.36

Colony #2956-2 Kick Starter Pedal Rubber Rod Kit 1917-Up Harley-Davidso - Parkerized
$19.36

Colony #2854-6-P Upper Engine Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
1 review $14.52

Colony #2530-6-P Fuel Tank Mounting Smooth Allen Kit 1985-1986 Harley-Davidson FXWG/FXST/FXSB/FXEF - Chrome Plated
$21.57

Colony #2528-10-P Gas Tank Mounting Smooth Allen Kit 1990-1995 Harley-Davidson Softail - Chrome Plated
$21.51

Colony #2522-6-P Rear Fender Rail Mounting Smooth Allen Screw Kit 1973-1984 Harley-Davidson FX - Chrome Plated
$19.48

Colony #2524-2-P Fuel Tank Smooth Mounting Kit Pre-1984 Harley-Davidson Big Twins - Chrome Plated
1 review $10.44

Colony #8795-4-P Handlebar Clamp Smooth Allen Screw Kit 1974-1971 Harley-Davidson FX/XL L1977-1984 FL - Chrome Plated
$10.04

Colony #2109-12-P Rear Master Cylinder Smooth Allen Mounting Kit 1982-1994 Harley-Davidson FXR 1984-1995 Softail - Chrome Plated
$13.40

Colony #9928-20-P Motor Mounting Smooth Allen Kit 1988-2006 Harley-Davidson FLT/FLHT/FXR/FXRS - Chrome Plated
$49.25

Colony #8441-1 Timing/Oil Plug All Harley-Davidson Timing Plug and 74s Oil Tanks - Chrome Plated
$8.78

Colony #8763-20-P Primary Cover Smooth Allen Screw Kit 1980-1984 Shovelhead & Evo 5 speed - Chrome Plated
$37.22

Colony #8762-17-P Primary Cover Smooth Allen Screw Kit 1971-Up Shovelhead/Evo 4 Speed - Chrome Plated
$33.17

Colony #8737-24-P Valve Cover Smooth Allen Screw Kit Harley-Davidson Panhead With Steel D Rings - Chrome Plated
$33.84

Colony #8474-8 Cylinder Base High Crown Cap Nut Set 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$29.34

Colony #8449-22 Rocker Box and Rocker Shaft Cap Nut Kit 1966-1983 Harley-Davidson Shovelhead - Chrome Plated
1 review $52.87

Colony #8440-12 Rocker Box Cap Bolt Set 1936-1947 Harley-Davidson Knucklehead - Chrome Plated
$27.51

Colony #2988-3 Crankcase Breather Stud and Pipe 1939-1947 Harley-Davidson Knuckleheads - Parkerized
$36.00

Colony #8797-4-P Handlebar Lever Mount Smooth Allen Screw Kit Pre-1972 Harley-Davidson FX/FL/XL - Chrome Plated
$6.38

Colony #2965-3 Tombstone Tail Light Cover Stainless Steel Screw Kit 1947-1972 Harley-Davidson Big Twins
2 reviews $4.24

Cycle Standard Mesh Air Cleaner - Black - Harley-Davidson CV Carb Sportster and Big Twin
27 reviews $87.81

Colony #2846-3 Wheel Bearing Locknut/Seal Kit Harley-Davidson XL/FL/FLH/FX/Sidecar/Servi-car - Chrome Plated
$36.30

Colony #2778-4 Tail Light Bracket Mounting Kit 1947-1948 Harley-Davidson Tombstone
2 reviews $4.54

Colony #2933-1 Clutch Side Nut 1936-1940 Harley-Davidson Big Twin Knuckelhead
$41.80

Colony #2822-1 Oversized Linkert Carburetor Venturi 1-1/16 inch OEM# 27362-30 Harley-Davidson
$41.97

Colony #2818-1 Oversized Linkert Carburetor Venturi 1-5/16 inch OEM# 27363-41 Harley-Davidson
$43.32

Colony #2908-2 Oil Tank Filler Cap and Gauge 1941-1964 Harley-Davidson Big Twins - Parkerized
$71.50

Colony #2903-2 Oil Tank Filler Cap and Gauge 1936-1940 Harley-Davidson Big Twins - CAD Plated
1 review $71.50

Colony #2677-10 Extra Long Seat Post Rod Nuts Spacers Kit 1936-1980 Harley-Davidson Big Twins
$82.50

Colony #2747-8 Rear Axle Adjusters Swingarm End Cover Kit 1997-2001 Harley-Davidson FLT - Zinc Plated
2 reviews $35.20

Colony #2609-4 Instrument Panel Dash Base Contact Spring Kit 1936-1946 Harley-Davidson Big Twins
$35.75

Colony #2577-1 Boot Guard 1936-Up Harley-Davidson Knucklehead/Flathead - Chrome Plated
$99.00

Colony #2651-10 Front Brake Shackle Rebuilding Kit 1939 Harley-Davidson Big Twin/45's
$90.88

Colony #2720-6 Rear Brake Shoe Pivot Stud and Cup Assembly 1938-1957 Harley-Davidson Big Twin - Parkerized
2 reviews $31.90

Colony #2783-5 Starter Pedal Axle Kit 1916-1962 Harley-Davidson - Parkerized
$30.25

Colony #2817-18 Oversized Top of Tank Screw and Washer Repair Kit 1918-1952 Harley-Davidson - Parkerized
$30.04

Colony #2744-10 Center Stand Mounting Kit 1958-1981 Harley-Davidson FL/FLH
1 review $28.60

Colony #2573-4 Shock Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
2 reviews $27.50

Colony #2708-5 Linkert Low Speed Needle Valve 3-1/16 inch Needle 1933-1947 Harley-Davidson
$25.30

Colony #2696-5 Linkert Low Speed Needle Valve 3-1/2 inch 1948-1965 Harley-Davidson Type 2 Heads
$25.30

Colony #2703-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Parkerized
$25.85

Colony #2921-2 Spring Retainer & Acorn Nut Set 1936-1948 Harley-Davidson Big Twin Springers 1936-1952 45s 1953-1954 Servi-car - Chrome Plated
2 reviews $23.38

Colony #2873-1 Rear Axle Spacer 1958-1966 Harley-Davidson FL/FLH - Chrome Plated
$23.65

Harley-Davidson Big Twin motorcycles are legendary for their raw power, distinctive style, and unmatched capacity for customization. From the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam, each Big Twin engine carries its...

If you’re looking to transform your ride—enhancing speed, comfort, or that unmistakable retro look—explore our Harley-Davidson Big Twin Parts collection. We have everything you need to customize your bike, whether you’re focusing on performance upgrades or eye-catching aesthetics.

Why Upgrade a Harley-Davidson Big Twin?

Boundless Customization: Big Twins allow for radical transformations—from stripped-down bobbers to vintage choppers—letting you express your unique vision.
Enhanced Performance: Boost horsepower, torque, and responsiveness with high-quality ignition kits, carburetors, and more.
Personalized Aesthetics: Whether it’s a retro-inspired racer or a comfortable tourer, your bike can reflect your style and riding needs.

Why Buy Big Twin Motorcycle Parts at Lowbrow Customs?

We curate top brands and rigorously test products for durability, fitment, and performance before shipping them out.
Variety of Choices: We offer a carefully curated selection of motorcycle parts for a wide range of Big Twin engines—from the Flathead and Knucklehead to the Panhead, Shovelhead, Evo, and Twin Cam—so you can find the perfect fit for your ride.
Expert Guidance: Need advice on installing a gas tank or swapping out your ignition? Our dedicated staff is here to help—from how-to videos to step-by-step articles.
Passion for Custom Builds: We’re not just sellers—we’re fellow riders who believe in the art of motorcycle customization. Count on our expertise to bring your dream bike to life.
Wide Selection & Fast Shipping: Our warehouse in northeast Ohio is stocked daily, ensuring you get the parts you need quickly. Plus, enjoy free economy shipping on U.S. orders over $99 and flexible return policy within 90-day & no return fee.

Our Featured Big Twin Motorcycle Parts Products

Ignition Kits & Carburetors: Gain more power and better throttle response by upgrading your ignition and carb system. A refined setup can increase speed, torque, and overall rideability.
Custom Gas Tanks: Our Big Twin gas tanks are crafted from high-grade steel, pressure-tested to prevent leaks, and available in multiple shapes and capacities. Achieve the perfect balance between form and function.
Handlebars & Controls: From vintage ape hangers to sporty drag bars, our collection of handlebars offers different heights, widths, and designs. Complete the setup with controls like grips, mirrors, and brake/clutch assemblies for a cohesive look.
Retro Accessories: Elevate your Big Twin’s retro appeal with add-ons like vintage-inspired seats, windshield options, saddle bags, or even a top-mounted box for touring. Personalizing these details completes the old-school charm.

Ready to Customize Your Harley-Davidson Big Twin?

Explore our Harley-Davidson Big Twin Parts collection today and transform your ride into the perfect blend of power, comfort, and style. If you have questions, reach out to our expert support team or dive into our installation guides for pro tips. Let’s make your dream bike a reality—shop now and gear up for the open road.

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Harley-Davidson Big Twin Parts FAQ

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