How far can a Harley go on a tank of gas?

Harley-Davidson motorcycles typically get 40-50 miles per gallon, which is a good reference point for how far you can ride based on the capacity of your gas tank. Sportsters tend to be smaller and get more miles per gallon, while large Touring bikes or Trikes are heavier and are on the lower range of miles per gallon.

What are the parts of fuel system?

Many new bikes are fuel injected, and have a computer to control the amount of gas fed to the engine. There is a fuel pump that provides fuel to the throttle body, which feeds the gasoline to the engine. Older bikes are carbureted, which is a simple system. Gas tends to be gravity fed from a gas tank to the carburetor and the amount of gas delivered to the engine depends on the size of the carburetor jets that are installed. The carburetor is tuned by changing the jets, which have different size orifices, which meters the amount of gasoline delivered to the engine.

Why is my motorcycle leaking gas?

If your motorcycle is leaking gas take a close look to see where the leak is originating. Common problems would include a leaky fuel valve (petcock), damaged fuel line, or if the fuel is coming from the carburetor, a stuck float. A leaky fuel valve or damaged fuel line can be replaced, while a stuck carburetor float can typically be fixed. The carburetor may just need some taps on the float bowl with the handle of a screwdriver to free the stuck float. If that doesn't work, make sure the fuel valve is off, remove the float bowl and check for grit or any debris that could be causing the float needle to not completely seat, which would allow gas to continue flowing into the float bowl even when it is full.

Gas Tanks

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Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Black
29 reviews $40.16 $49.05

Colony #3587-1 Gas Tank Buffer 1936-1947 Harley-Davidson Knucklehead 1937-48 U Models
$19.36

Bates 1/4" NPT Petcock Conversion Kit 1940-65 H-D Big Twins and 45”/750 cc Sidevalves - CAD Plated
4 reviews $77.49

Colony #3382-14 Gas Tank Mount Kit 1958-1985 Harley-Davidson Sportster XL - Chrome Plated
1 review $37.40

Cycle Standard Domed Slim Black Screw-In Harley Style Gas Cap 1996 & up
43 reviews $23.14

Cycle Standard Screw-in Style Gas Cap Gasket replaces Harley-Davidson OEM #61109-85
22 reviews $3.41

British Standard 1/4 inch BSP Petcock Fuel Valve Petcock Fuel Valve - Main - UK Made For Triumph BSA Norton
8 reviews $46.17

Lowbrow Customs 22mm to 3/8 inch NPT Chrome Petcock Adapter Nut
13 reviews $25.10

Lowbrow Customs 22mm to 3/8 inch NPT Brass Petcock Adapter Nut
13 reviews $25.10

Colony #3588-1 Gas Tank Buffer 1909-1925 Harley-Davidson All 1926-1929 F/J 1930-1936 V/VL
$9.68

Lowbrow Customs Aluminum Gas / Oil Filler Cap with Weld-In Steel Bung - Unvented
4 reviews $37.74

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Aluminum
4 reviews $46.24

Motone Billet Bayonet / Cam Harley Style Vented Gas Cap - Aluminum
$34.99

Colony #3038-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twins 1971-1972 FX - Parkerized
1 review $17.42

Colony #3384-4 Gas Tank Spacers 1952-1981 Harley-Davidson K/XL- 4 pack - CAD Plated
1 review $10.89

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Gloss Black
6 reviews $29.18

Colony #2702-7 Gas Tank Shut Off Rod Upper Kit 1940-1965 Harley-Davidson Big Twin/45s - Chrome Plated
$27.50

Colony #2076-10 Gas Tank Mounting Acorn Kit 1991-Up Harley-Davidson Dyna - Chrome Plated
1 review $27.23

British Standard 1/4 inch BSP Petcock Fuel Valve Reserve For Triumph 650 750 Norton 750 850
2 reviews $20.48

Lowbrow Customs 22mm to 1/4 inch NPT Brass Petcock Adapter Nut
16 reviews $25.10

Colony #9891-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Chrome Plated
3 reviews $18.88

British Standard Flat Washer for British 1/4 inch BSP Petcocks OEM # 83-0002 Triumph BSA Norton
4 reviews $2.63

Colony #3478-10 Gas Tank Mount Kit 1979-1981 Harley-Davidson XLCH Sportster - Chrome Plated
$18.15

Colony #9893-18 Gas Tank Mounting Kit 1937-1975 Harley-Davidson Big Twin 1972-1972 FX - Parkerized
3 reviews $17.42

Colony #3543-6 Gas Tank Name Plate Gaskets 1940-1946 Harley-Davidsons
$17.25

Colony #2530-6 Gas Tank Allen Mounting Kit 1985-1956 Harley-Davidson FXWG/FXST/FXSB/FXEF - Chrome Plated
1 review $16.70

Colony #3039-12 Gas Tank Mounting Kit 1937-1952 Harley-Davidson 45 Solo 1937-Up Servi-car - Parkerized
2 reviews $15.62

Colony #9896-12 Gas Tank Mounting Kit 1937-1952 Harley-Davidson 45 Solo 1937-Up Servi-car - Parkerized
1 review $15.62

British Standard Petcock Straight Fuel Feed Pipes British Triumph BSA Norton OEM # 82-3334
4 reviews $14.94

Colony #2128-5 Gas Tank Acorn Nut Mounting Kit 1984-1999 Harley-Davidson Softail - Chrome Plated
$14.83

Colony #2523-5-P Fuel Tank Smooth Button Head Mounting Kit 1988-1994 Harley-Davidson FXR - Chrome Plated
1 review $13.92

Colony #2523-5 Gas Tank Allen Mounting Kit 1988-1994 Harley-Davidson FXR - Chrome Plated
$13.22

Prism Supply Co. Prism Supply Co. Petcock Rebuild Kit
$12.99

Colony #2266-8-P Gas Tank Smooth Allen Mounting Kit 2004-Up Harley-Davidson Sportster - Chrome Plated
1 review $11.90

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 #3388-8 Gas Tank Mounting Kit 2004-Up Harley-Davidson Sportster XL
$5.80

Drag Specialties Fat Bob Flatside Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 3.5 Gallon
$348.09

Gigacycle Garage Gigacycle Garage Left Side Non-Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Gigacycle Garage Gigacycle Garage Right Side Vented Gas Cap for 1992-Up Harley-Davidsons
$107.14

Prism Supply Co. 3/4"-18 Petcock Fits Early Style Harley-Davidson Tanks - Brass
$134.99

Colony #3626-2 Gas Tank Front Mount Rubber Bumpers 2000-2007 Harley-Davidson FXSTD/I 2010-2011 FXCWC
$16.50

Colony #3575-1 Gas Tank Buffer 1926-1934 Harley-Davidson Singles 1929-1937 45 Twins
$14.52

Colony #8821-18-OS Oversize Top of Tank Screw & Washer Kit 1918-1936 All Harley-Davidson 1936-1952 45s - Nickel Plated
$31.14

Colony #2106-4 Countersunk Gas Tank Mounting Kit 1998-Up Harley-Davidson FLT - Chrome Plated
$14.34

Colony #2461-3 Gas Tank Clip Screw Set 1910-1917 Harley-Davidson All Models - Nickel Plated
$16.70

Colony #2782-4 Springer Spring Rod Kit 1938-1939 Harley-Davidson 45s
$42.63

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

Colony #3334-1 Fuel Strainer Hose Nipple 1932-1938 Harley-Davidson Twins - CAD Plated
$7.87

Motone Bolt-Down Billet Adapter for 2.5" Monza Gas Cap
$37.19 $46.19

Motone Weld-In Threaded Steel Filler Neck for 2.5" Monza Gas Cap
$20.61

Solid Custom Rippled Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Black
1 review $79.99 $99.99

Motone Billet Bayonet / Cam Harley Style Vented Gas Cap - Brass
$59.99

Colony #3719-4 Fuel Tank Rubber Grommet Kit 2018-Up Harley-Davidson Softails
$20.00

Golan Products Inc. 3/8 inch NPT Click-Slick Petcock - Round Body - Black - Straight
$130.95

Golan Products Inc. 3/8 inch NPT Click-Slick Petcock - Round Body - Black - Backward
$130.95

Golan Products Inc. 3/8 inch NPT Click-Slick Petcock - Round Body - Brass - Straight
1 review $130.95

Golan Products Inc. 3/8 inch NPT Click-Slick Petcock - Round Body - Chrome - Backward
$130.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Black - Straight
$130.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Chrome - Straight
1 review $130.95

Golan Products Inc. 22MM Click-Slick Petcock - Round Body - Chrome - Backward
$130.95

Pingel In-Line Custom Fuel Valve
$128.95

Pingel 1/4 inch NPT Power-Flo Petcock - Hex Body - Aluminum - Inward
2 reviews $119.95

Pingel 3/8 inch NPT Power-Flo Petcock - Hex Body - Brass - Inward
$131.95

Pingel 3/8 inch NPT Power-Flo Petcock - Round Body - Brass - Inward
$131.95

Pingel 3/8 inch NPT Power-Flo Petcock - Hex Body - Chrome - Forward
$131.95

Pingel 3/8 inch NPT Power-Flo Petcock - Round Body - Chrome - Forward
$131.95

Pingel 22MM Power-Flo Petcock - Hex Body - Brass - Inward
$152.95

Pingel 22MM Power-Flo Petcock - Round Body - Brass - Inward
$152.95

Pingel 22MM Power-Flo Petcock - Hex Body - Black - Inward
$173.95

How-to Select a Killer Custom Motorcycle Gas Tank & Its Accessories Choosing a Gas Tank for Your Motorcycle If you are in search of a killer custom motorcycle gas tank, you are in the right place. Lowbrow Customs has a great selection of some ...

Choosing a Gas Tank for Your Motorcycle

If you are in search of a killer custom motorcycle gas tank, you are in the right place. Lowbrow Customs has a great selection of some of the most sought-after custom motorcycle gas tanks available. These are high-quality Lowbrow Customs gas tanks that you see on some of the most popular builds out there.

We have a great selection of Sportster® gas tanks that can completely transform the look of your build. Classic choices like the original P-Nut Deep Tunnel and Mid-Tunnel gas tanks offer that smooth, rounded style so many builders love. If clean lines and a front-forward teardrop shape are more your style, the Narrow Sporty Frisco Gas Tank is a perfect fit. For those looking to add vintage chopper flair with a practical twist, the WX Split Gas Tanks stand out with their timeless design and dual-cap functionality, making them a versatile option for any custom build.

If you need just a straight-forward replacement Sportster® motorcycle tank, we have that too. Lowbrow Customs also carries custom motorcycle tanks for Big Twins, vintage motorcycle gas tanks, teardrop gas tanks, or old school chopper gas tanks like the classic coffin tank. All of our custom Harley fuel tanks are made from high quality steel and are professionally welded. The custom motorcycle gas tanks come pre-sanded ready for paint.

We always recommend that you pre-fit any aftermarket motorcycle gas tank before painting. Be sure to check for clearance or mounting issues as different combinations of triple trees, risers, and handlebars may cause clearance issues when turning.

Custom Motorcycle Gas Tank Mounting Hardware and Accessories

Now that you have your gas tank picked out, be sure to check out our selection of gas tank mounting hardware and accessories. We have some of the coolest custom motorcycle gas caps you can find, like sportster flush mount gas caps. From the classic spinner sportster gas cap with the 3-prong design to standard replacement gas caps and pop-up gas caps.

We carry a full selection of mounting hardware from Colony™ to help get the tank mounted properly. We also carry a nice assortment of motorcycle fuel petcocks, weld in tank bungs, and the best fuel reserve bottles in the market. If you are looking for a custom motorcycle gas tank, Lowbrow Customs is the place to be.

Custom motorcycle gas tanks for sale combined with an assortment of fuel petcocks, caps, mounting hardware and accessories. All in one easy to use website ready to ship to your door. Last but not least, if you are totally new to customizing your gas tank, watch our video how to mount a gas tank for detailed steps that you can follow.

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