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 #9956-18 Motor Case Mounting Kit Allen 1999-Up Harley-Davidson Twin Cam/Dyna/FLT 2000-Up Softail - Chrome Plated
$20.85

Colony #9955-27 Motor Case Mounting Kit Acorn 1999-Up Harley-Davidson Twin Cam/Dyna/FLT 2000-Up Softail - Chrome Plated
$36.20

Colony #9952-11 Transmission Shifter Cover Mounting Kit Allen 1998-2006 Harley-Davidson FLT/Softail - Chrome Plated
$11.90

Colony #2526-4-P Rear Master Cylinder Mounting Kit Smooth Allen 1984-1985 Harley-Davidson FX - Chrome Plated
$10.44

Colony #2007-6-P Air Cleaner Mounting Kit Smooth Allen 1978-1983 Harley-Davidson Big Twins - Chrome Plated
$5.92

Colony #2885-24 Valve Spring Cover Set Plated 1930-1936 Harley-Davidson VL - CAD Plated
$198.00

Colony #2883-3 Front Brake Cable Adjusting Screw 1949 Harley-Davidson Big Twins - CAD Plated
$22.00

Colony #2854-6 Upper Engine Allen Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$13.92

Colony #2848-8 Batwing Fairing Spotlight and Turn Signal Bracket Mounting Kit 1996-Up Harley-Davidson - Chrome Plated
$16.34

Colony #2847-3 Wheel Bearing Locknut Seal Kit 1967-1972 Harley-Davidson FL/FLH 1971-1972 FX 1967-1972 Servi-car - CAD Plated
$33.00

Colony #2820-2 Brake Cable Lubricator 1930-1938 Harley-Davidson All Models
$30.04

Colony #2819-8 Horn Terminal Board Kit 1942-1946 Harley-Davidson All Models
$25.08

Colony #2811-13 Instrument Panel Light Switch Kit 1936-1945 Harley-Davidson Big Twin/45s - CAD Plated
$40.70

Colony #2810-13 Instrument Panel Light Switch Kit 1937-1938 Harley-Davidson Big Twins - CAD Plated
$40.70

Colony #2804-2 Front Brake Cable Sleeve Adjuster and Nut 1928-1940 Harley-Davidson All Models - Parkerized
$15.52

Colony #2803-2 Front Brake Cable Sleeve Adjuster and Nut 1928-1940 Harley-Davidson All Models - CAD Plated
$15.52

Colony #2802-2 Front Brake Cable Sleeve Adjuster and Nut 1928-1940 Harley-Davidson All Models - Chrome Plated
$17.14

Colony #2776-9 Headlight Bracket Mount Kit 1936-1948 Harley-Davidson Big Twin 1940-1957 45s - Chrome Plated
$24.20

Colony #2769-4 Kick Starter Pedal Mounting Kit 1917-1941 Harley-Davidson - Parkerized
$9.68

Colony #2741-2 Clutch Tension Adjusting Nut and Lockwasher Undersized 1936-1940 Harley-Davidson Big Twins - Parkerized
$31.63

Colony #2678-2 Gear Box Grease Tube and Fitting Kit 1926-1929 Harley-Davidson 61"/74" - Nickel Plated
$18.15

Colony #2662-1 Spoke Nipple Wrench for Metric Nipples 1980-Up Harley-Davidson
$55.00

Colony #2649-9 Top Motor Mount Hardware Kit 1936-1947 Harley-Davidson Big Twin - Parkerized
$15.13

Colony #2648-9 Top Motor Mount Hardware Kit 1936-1947 Harley-Davidson Big Twin - CAD Plated
$15.13

Colony #2646-1 Oversized Rear Axle Sleeve Nut 1930-1972 Harley-Davidson Big Twins - Parkerized
$4.76

Colony #2645-1 Oversized Rear Axle Sleeve Nut 1930-1972 Harley-Davidson Big Twins - CAD Plated
$4.76

Colony #2635-2 Fork Rocker Studs Towbar 1940-1948 Harley-Davidson Big Twins1940-1957 Servi-car
$55.00

Colony #2634-12 Utility Saddlebag Holder Kit 1936-1938 Harley-Davidson Big Twins
$93.50

Colony #2630-8 Front Crash Bar Mounting Kit 1951-1954 Harley-Davidson Big Twins - Chrome Plated
$6.96

Colony #2578-4 Top Motor Mount Hardware Kit 1948-1951 Harley-Davidson Big Twins - Parkerized
$11.20

Colony #2571-2 Crank Pin Nut Set 1983-1999 Harley-Davidson Big Twins
$26.50

Colony #2568-24 Spotlight Hardware and Rebuild Kit 1938-1961 Harley-Davidson - CAD Plated
$39.22

Colony #2565-3 Rear Brake Caliper Anchor Arm Bolt Kit 1981-1985 Harley-Davidson Big Twins - CAD Plated
$11.13

Colony #3060-5 Foot Clutch Lever Friction Disc Kit 1936-1940 Harley-Davidson Knucklehead 1938-1952 45 Solo 1938-1946 Servi-car - Parkerized
$37.39

Colony #9952-11-P Transmission Shifter Cover Smooth Mounting Kit 1998-2006 Harley-Davidson FLT/Softail - Chrome Plated
$14.16

Colony #9948-8-P Electrical Panel Cover Smooth Chrome Allen Mounting Kit Harley Dyna 91-up
$8.56

Colony #9927-28-P Upper and Lower Motor Mount Kit Smooth Allen 1984-1999 Harley-Davidson Softail - Chrome Plated
$53.58

Colony #9789-17-P Transmission Shifter Cover Smooth Allen Screw Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
$19.36

Colony #8908-15-P Transmission Side Cover Smooth Allen Screw Kit 1980-1986 Harley-Davidson 5 speed FX/FL - Chrome Plated
$29.78

Colony #8756-30-P Primary Cover Smooth Allen Screw Kit 1936-1964 Harley-Davidson Big Twins - Chrome Plated
$32.00

Colony #8723-16 Handlebar Clamp Mount Kit Cap Bolts Kit 1974-Up Harley-Davidson FX/FL - Chrome Plated
$18.72

Colony #8489-8 Handlebar Switch Housing Cap Screw Kit 1973-1981 Harley-Davidson Big Twin/Sportster - Chrome Plated
$21.90

Colony #8482-20 Primary Cover Cap Screw Kit 1980-1984 Harley-Davidson 5 Speed Big Twins - Chrome Plated
$48.73

Colony #8478-27 Transmission Cap Screw and Nut Kit 1980-1985 Harley-Davidson FLT 5 Speed - Chrome Plated
$64.09

Colony #8477-12 Oil Pump Screw Kit Chrome Cap Style Harley Big Twin 1978-91
$27.51

Colony #8476-4 Dash Mounting Chrome Cap Style Kit Harley Davidson FX 1977-85
$14.74

Colony #8468-20 Primary Cover Cap Screw Kit 1936-1969 Harley-Davidson Big Twins - Chrome Plated
$59.38

Colony #8460-20 Heat Treated Chrome Cap Style Head Bolt Kit Harley Knucklehead 1940-47
$66.63

Colony #8452-12 Primary Cover Cap Screw Kit 1965-1970 Harley-Davidson Big Twins - Chrome Plated
$36.94

Colony #8446-10 Circuit Breaker Relay Chrome Cap Screw Kit Harley Big Twins 1936-57 Knuckle Pan
$17.14

Colony #8443-2 Generator Chrome Cap Screw Set Harley Davidson 1958-69 Pan Shovel
$13.94

Colony #8439-13 Oil Pump Cap Nut / Block Off Plug Chrome Cap Nut Set Harley 1936-67
$20.70

Colony #2996-1 Spark Plug Cable Clip Front 1936-1940 Harley-Davidson OHV - CAD Plated
$5.57

Colony #2992-4 Handlebar Bolt Kit 1940-1948 Harley-Davidson Big Twin Springers 1940-Up /45 Springer - Parkerized
$9.68

Colony #2987-4 Spring Retainer Acorn Nut Set 1936-1938 Harley-Davidson Big Twin 1949-1957 45s - Parkerized
$21.18

Colony #2977-2 Generator Screws 1930-1936 Harley-Davidson VL - CAD Plated
$10.37

Colony #2976-1 Tansmission Filler Plug 1917-1929 Harley-Davidson 61" 1921-1936 74"- CAD Plated
$13.20

Colony #2975-1 Gear Box Adjusting Bolt 1925-1936 Harley-Davidson J/JD/VL - CAD Plated
$17.55

Colony #2960-1 Spark Plug Cable Clip Front 1936-1940 Harley-Davidson OHV - Parkerized
$5.57

Colony #2958-4 Hand Brake Lever Screw Kit 1928-1940 Harley-Davidson - Parkerized
$18.88

Colony #2953-5 Carburetor Support Bracket 1954-E1955 Harley-Davidson OHV Big Twins - Parkerized
$22.50

Colony #2527-8-P Rear Fender Rail Mounting Kit Smooth Allen 1980-1985 Harley-Davidson FXWG - Chrome Plated
$22.77

Colony #7933 Complete Show Bike Kit Acorn Hardware Harley-Davidson 2007-up Twin Cam 88 Softail - Chrome Plated
$346.14

Colony #7906 Complete Show Bike Kit Acorn Hardware Harley-Davidson 1940-1947 Knucklehead - Chrome Plated
$395.76

Colony #3029-12 Pushrod Covers 1940-1947 Harley-Davidson Knucklehead - CAD Plated
$54.67

Colony #3027-20 Upper Pushrod Covers Kit 1940-1947 Harley-Davidson Knucklehead - Parkerized
$50.08

Colony #3026-12 Pushrod Covers 1940-1947 Harley-Davidson Knucklehead - Parkerized
$54.67

Colony #9018-5 Hand Shifter Lever Stud and Bushing Kit 1936-1954 Harley-Davidsons - Chrome Plated
$21.73

Colony #8915-17 Primary Cover Cap Screw Kit 1985-Up Harley-Davidson FXR 1985-1999 FLT 5 Speed - Chrome Plated
$49.25

Colony #8905-7-P Transmission Shifter Cover Smooth Allen Kit 1980-1986 Harley-Davidson Big Twin 4 speed - Chrome Plated
$15.27

Colony #8804-2 Transmission Fill Plug Dipstick 1985-1986 Harley-Davidson Evo 5 Speed - Gold Plated
$20.70

Colony #8767-10-P Handlebar Lever Mount MC Cover Smooth Allen Screws 1982-1995 Harley-Davidson FL/FX/XL - Chrome Plated
$18.62

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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