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 #3214-4 Generator Pole Screw Kit 1951 - 1957 Harley-Davidson Twins — Colony #3214-4 Generator Pole Screw Kit 1951-1957 Harley-Davidson All Twins - Parkerized
$6.96

Colony #3218-1 Steering Damper Knob 1952 - 1966 Harley-Davidson K KH FL FLH Sportster — Colony #3218-1 Steering Damper Knob 1952-1966 Harley-Davidson K/KH/XL 1960-1984 FL/FLH 1960-Up Servi-car
$49.50

Colony #3115-3 Headlamp Mounting Kit 1935 - 1948 Harley-Davidson Big Twins and 45's — Colony #3115-3 Headlamp Mounting Kit 1935-1948 Harley-Davidson Big Twins/45's - CAD Plated
$6.05

Colony #2918-3 Rear Brake Spring and Brake Lock Pull 1937 - 1940 Harley-Davidson — Colony #2918-3 Rear Brake Spring & Brake Lock Pull 1937-1940 Harley-Davidson - Parkerized
$32.45

PanAm Oils Inc. Oil Pressure Gauge 0-60 psi - Black
9 reviews $37.15

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Brass
10 reviews $83.23

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Aluminum
2 reviews $48.55

Colony #3188-4 CAD Plated Headlamp Housing Mounting Kit 60-78 Harley Davidson FL FLH — Colony #3188-4 Headlamp Housing Mounting Kit 1960-1978 Harley-Davidson FL/FLH - CAD Plated
$12.10

Colony #3064-2 Parkerized Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3064-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - Parkerized
$5.45

Colony #3205-2 CAD Plated Fender Brace Bolt Kit 1941-57 Harley Davidson Big Twin and 45 — Colony #3205-2 Fender Brace Bolt Kit 1941-1957 Harley-Davidson Big Twin/45's - CAD Plated
$5.45

Colony #3198-1 Parkerized Brake Operating Lever 36-57 Harley Davidson Big Twin — Colony #3198-1 Brake Operating Lever 1936-1957 Harley-Davidson Big Twins - Parkerized
$38.50

Colony #3182-5 Jiffy Stand Clevis Pin Clip Chrome Plated Harley Davidson — Colony #3182-5 Jiffy Stand Clevis Pin Clip 1989-Up Harley-Davidson XL 1991-Up Dyna 2002-Up VRSC 2007-Up Softail - Chrome Plated
$12.10

Colony #3181-5 Jiffy Stand Clevis Pin Clip Zinc Plated Harley Davidson — Colony #3181-5 Jiffy Stand Clevis Pin Clip 1989-Up Harley-Davidson XL 1991-Up Dyna 2002-Up VRSC 2007-Up Softail - Zinc Plated
1 review $11.00

Colony #3175-6 Fork Panel Mounting Kit 49-70 Harley Davidson Big Twins XL — Colony #3175-6 Fork Panel Mounting Kit 1949-1970 Harley-Davidson Big Twin/XL - CAD Plated
1 review $17.42

Colony #3172-1 Ignition Switch Contact Roller Harley Davidson 1936-1984 Big Twins — Colony #3172-1 Ignition Switch Contact Roller 1936-1984 Harley-Davidson Big Twins
$8.47

Colony #3169-1 Chain Oiler Hose Clamp 1978-82 Harley Davidson FL — Colony #3169-1 Chain Oiler Hose Clamp L1978-1982 Harley-Davidson FL/FLH - Zinc Plated
$7.87

Colony #3168-16 Footboard Mounting Kit 1965-69 Harley Davidson Big Twins — Colony #3168-16 Footboard Mounting Kit 1965-1969 Harley-Davidson Big Twins - Parkerized
1 review $54.45

Colony #3161-4 Air Cleaner Mount Kit 1984-85 Harley Davidson FL FX — Colony #3161-4 Air Cleaner Mount Kit 1984-1985 Harley-Davidson FL/FX/XL - Zinc Plated
$15.95

Colony #3157-11 Buddy Seat Auxillary Spring Bolt Kit 1936-69 Harley Davidson — Colony #3157-11 Buddy Seat Auxillary Spring Bolt Kit 1936-1969 Harley-Davidson Big Twins - Parkerized
2 reviews $20.57

Colony #3147-2 Air Horn Cover Mount Screws 1936 Harley-Davidson Knucklehead - CAD Plated
$7.26

Colony #3143-2 Top Plugs For Classic Springer Forks - Brass — Colony #3143-2 Brass Top Plugs For Classic Harley-Davidson Springer Forks
1 review $22.00

Morris Magneto X5 Magneto for Generator Model Harley Davidson Ironhead Sportsters and 45 Flat Heads
$2,221.77

Morris Magneto T5 Twin Cam Magneto for Harley Davidson - Brushed Finish
$2,453.41

Morris Magneto 74LDMD Dual Magneto Setup for Alternator Big Twin Harley Davidsons - Brushed Finish
$3,101.96

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons with Aftermarket Cases - Brushed Finish
$1,942.38

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons 1993 - 1999 - Brushed Finish
$1,942.38

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons 1974 - 1992 - Brushed Finish
2 reviews $1,942.38

Morris Magneto MM74L Magneto for Alternator Big Twin Harley Davidsons 1970 - 1973 - Brushed Finish
$1,942.38

Morris Magneto Morris M-5 Magneto for Alternator Big Twin Harley Davidsons with Aftermarket Cases - Brushed Finish
$2,395.00

Morris Magneto M-5 Magneto for Alternator Big Twin Harley Davidsons 1993 - 1999 - Brushed Finish
$2,395.00

Morris Magneto Morris M-5 Magneto for Harley Davidson Big Twin 1974-1992 – Brushed Finish
$2,395.00

Cannonball I-Beam Inline Springer Front Fork - Chrome springs
1 review $2,710.29

Colony #3133-4 Jiffy Stand Mounting Kit Zinc Harley Dyna 1991-up — Colony #3133-4 Jiffy Stand Mounting Kit 1991-Up Harley-Davidson Dyna - Zinc Plated
4 reviews $11.80

Colony #3130-5 Front Brake Hand Lever Bracket Clamp Kit CAD all Harley 1941-54 — Colony #3130-5 Front Brake Hand Lever Bracket Clamp Kit 1941-1954 Harley-Davidson All Models - CAD Plated
$12.34

Colony #3128-5 Clutch Hand Lever Bracket Clamp Kit CAD Harley 53-64 K KH XL 41-48 Big Twin 45 Servi-Car — Colony #3128-5 Clutch Hand Lever Bracket Clamp Kit 1953-1964 Harley-Davidson K/KH/XL 1941-1948 Big Twin/45/Servi-Car - CAD Plated
$12.34

Colony #3118-3 Sprocket Nut Lockplate Harley 93-06 Softail Touring 93-05 Dyna — Colony #3118-3 Sprocket Nut Lockplate 1993-2006 Harley-Davidson Softail/Touring 1993-2005 Dyna
$14.51

Colony #3113-5 Motor Case Breather Stud Parkerized Harley Davidson FL FLH 1958-63 — Colony #3113-5 Motor Case Breather Stud 1958-1963 Harley-Davidson FL/FLH - Parkerized
$57.20

Cycle Electric Rectifying Regulator CE-608 - 2009-2013 Harley-Davidson FLH FLT Models with Low Mount Oil Cooler
20 reviews $217.85 $233.20

#3107-16 Front Shock Absorber Upper Mount Kit Harley Springer 1946-57 — Colony #3107-16 Front Shock Absorber Upper Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$51.15

#3106-18 Front Shock Absorber Lower Mount Kit Harley Springer 1946-57 — Colony #3106-18 Front Shock Absorber Lower Mount Kit 1946-1957 Harley-Davidson Springers - Parkerized
$97.90

#3104-14-P Transmission Side Cover Chrome Polished Allen Kit Harley Touring 2017-up — Colony #3104-14-P Transmission Side Cover Polished Allen Kit 2017-Up Harley-Davidson Touring - Chrome Plated
$24.48

#3100-4 Battery Box Lid Wing Nuts Harley-Davidson 66387-26 — Colony #3100-4 Battery Box Lid Wing Nuts Harley-Davidson OEM #66387-26
1 review $4.84

#3098-4 Transmission Case Bottom Stud Kit Harley-Davidson Twins 1915-36 — Colony #3098-4 Transmission Case Bottom Stud Kit 1915-1936 Harley-Davidson Twins
$19.93

#3097-1 Transmission Adjuster Screw Support Strap Parkerized Harley Big Twins 1936-57 — Colony #3097-1 Transmission Adjuster Screw Support Strap 1936-1957 Harley-Davidson Big Twins - Parkerized
1 review $18.15

#3089-2 Front Fork Steering Damper Spring Kit Harley 1949-77 FL FLH 58-73 Servicar — Colony #3089-2 Front Fork Steering Damper Spring Kit 1949-1977 Harley-Davidson FL/FLH 1958-1973 Servi-car - Parkerized
$24.20

#3087-1 Foot Shifter Lever Bushing Harley Big Twins 1952-69 — Colony #3087-1 Foot Shifter Lever Bushing 1952-1969 Harley-Davidson Big Twins
$21.78

#3086-12 Front Stand Mounting Kit Parkerized Harley Big Twin 1931-48 — Colony #3086-12 Front Stand Mounting Kit 1931-1948 Harley-Davidson Big Twins - Parkerized
$68.20

Cycle Electric CE-500L Replacement Regulator for DGV-5000L Generator
5 reviews $180.23 $192.93

Lowbrow Customs Finish Line Shifter Peg for Harleys - Black Aluminum
4 reviews $30.78

Colony #8511 Complete Show Bike Kit Cap Style Hardware 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
1 review $400.47

Colony #8445-12 Timing Cover Cap Set 1936-1969 Harley-Davidson 74 & 61 cu. in. OHV - Chrome Plated
1 review $34.40

Colony #7915 Complete Show Bike Kit Acorn Hardware 1976-1977 Harley-Davidson Shovelhead - Chrome Plated
2 reviews $383.08

Colony #7907 Complete Show Bike Kit Acorn Hardware 1948-1957 Harley-Davidson Panhead - Chrome Plated
$383.08

Colony #3072-4 Rocker Stud Bushing Set Oversized +.003 1930-1948 Harley-Davidson Big Twin Springers
$48.88

Colony #3036-22 Upper and Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Parkerized
1 review $43.82

Colony #3031-4 Upper Inner Pushrod Covers 1957-1985 Harley-Davidson Sportster 1936-1983 OHV Big Twin - CAD Plated
1 review $34.05

Colony #3030-20 Upper Pushrod Covers Kit 1940-1947 Harley-Davidson Knucklehead - CAD Plated
$50.08

Colony #3028-4 Upper Inner Pushrod Covers 1957-1985 Harley-Davidson Sportster 1936-1983 OHV Big Twin - Parkerized
3 reviews $34.05

Colony #3014-34 Stock Fastener Motor Case Kit 1948-1964 Harley-Davidson Panhead - Parkerized
2 reviews $51.70

Colony #3012-34 Stock Fastener Motor Case Kit 1936-1939 Harley-Davidson Knucklehead - Parkerized
2 reviews $51.70

Colony #3011-34 Stock Fastener Motor Case Kit 1940-1948 Harley-Davidson Flathead - Parkerized
$51.70

Colony #2999-5 Rear Brake Switch Pull Kit 1940-1957 Harley-Davidson Big Twins - Parkerized
$31.89

Colony #1010-P Complete Show Bike Kit Smooth Allen Hardware 1978-1984 Harley-Davidson Shovelhead - Chrome Plated
$189.02

Colony #2886-24 Valve Spring Cover Kit 1937-1938 Harley-Davidson Big Twin Side Valve - CAD Plated
1 review $198.00

Colony #9930-14-P Intake Manifold to Cylinder Head Smooth Allen Screw Kit L1982-1989 Harley-Davidson Big Twin - Chrome Plated
$15.14

Colony #9424-8 Cylinder Base Stud Set 1985-1999 Harley-Davidson Big Twin Evo
$90.20

Colony #2864-5 Front Axle Mounting Kit 1997-1999 Harley-Davidson FLSTS - Chrome Plated
2 reviews $50.60

Colony #2024-4 Headbolt Covers L1985-Up Harley-Davidson FL/FX/XL - Chrome Plated
1 review $52.14

Colony #9723-22 Upper and Lower Motor Mount Kit 1937-1947 Harley-Davidson Big Twin Side Valve - Parkerized
$43.82

Colony #8736-24-P Valve Cover Smooth Allen Screw Kit Harley-Davidson Panhead w/Aluminum D Rings - Chrome Plated
1 review $34.85

Colony #2279-16 Head Bolt Kit 12 Point Bolts L1984-E1985 Harley-Davidson Evo - Chrome Plated
$33.84

Colony #8933-16 Rocker Box Screw Kit 1985-Up Harley-Davidson FL/FX - Chrome Plated
$25.72

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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