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.

Harley-Davidson Big Twin Gas Tanks

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Lowbrow Customs WX Split Gas Tanks - Bolt-On for 1936 - 1984 Big Twin Harley-Davidsons - 2.25 gallon
82 reviews $399.99

Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Chrome
52 reviews $18.56

Cycle Standard Fat Bob Style Gas Tanks - 1948-1984 Harley-Davidson FX/FL - 3.5 Gallon
$276.46

Lowbrow Customs Mounting Kit for WX Gas Tanks - 1985-1999 Harley-Davidson Softails
$62.39

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Chrome
37 reviews $24.20

Lowbrow Customs Competition Screw-In Gas Cap for Harley-Davidson 1996 & later - Polished
37 reviews $40.29 $49.18

Lowbrow Customs Dished Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
16 reviews $79.27

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1996 & up - Black
62 reviews $18.74

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Right Hand Outlet
13 reviews $25.46 $35.09

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

Cycle Standard 22mm Petcock Round Body Solid Brass Harley-Davidson Style - Left Side Position
14 reviews $66.88

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Left Hand Outlet
29 reviews $34.72

Drag Specialties Vented Screw-In Gas Cap - Chrome - 1982-1996 Harley-Davidson
4 reviews $29.82

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Straight Outlet
27 reviews $32.15

Motone Screw-In Billet Adapter for 2.5" Monza Gas Cap for 1996 & later Harley-Davidson
$56.08 $69.64

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

Cycle Standard 22mm Petcock Harley-Davidson Style - Black - Left Hand Outlet
21 reviews $34.94

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Straight Outlet
17 reviews $34.62

Cycle Standard 22mm Petcock Round Body Chrome Harley-Davidson Style - Left Side Position
17 reviews $66.89

Cycle Standard Domed Slim Chrome Screw-In Harley Style Gas Cap 1996 & up
15 reviews $25.00

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

Lowbrow Customs Banded Screw-In Gas Cap for Harley-Davidson 1996 & later - Brass
35 reviews $79.27

Cycle Standard 22mm Petcock Harley-Davidson Style - Chrome - Right Hand Outlet
17 reviews $34.68

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

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

Cycle Standard Bayonet / Cam Harley Style Vented 2" Gas Cap - Black
29 reviews $16.40

Lowbrow Customs Finned Thread-In Gas Cap for Harley-Davidson 1996 & later - Polished
30 reviews $48.84

Cycle Standard Bayonet / Cam Harley Style Vented 2.5" Gas Cap - Chrome
12 reviews $32.33

Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Black
$82.47 $102.31

Motone Screw-In Billet Gas Cap for 1996 & later Harley-Davidson - Vented - Satin Brass
$82.47 $102.22

Lowbrow Customs Banded Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Brass
5 reviews $79.27

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1996 & Later - Antique Brass
$79.27

Lowbrow Customs Domed Screw-In Gas Cap for Harley-Davidson 1982-1995 / Modern Triumph Bonneville T100 / T120, Scrambler, Thruxton - Brass
9 reviews $79.27

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

Colony #7807-3 Gas Tank Fitting Kit 1950-1965 Harley-Davidson Big Twins - Chrome Plated
1 review $23.91

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

Cycle Standard Bayonet / Cam Harley Style Non-Vented 2" Gas Cap - Chrome
$12.34

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

Colony #3574-1 Gas Tank Rubber Divider 1939-1979 Harley-Davidson Big Twins
$14.52

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

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

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

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

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

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

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

Colony #3718-4 Fuel Tank Rubber Grommet Kit 2000-2017 Harley-Davidson Softails
$20.90

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

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

Colony #7801-2 Gas Tank Shut Off Operating Knob Extension 1940-65 Harley-Davidson
2 reviews $11.96

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

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Black
$19.43

Cycle Standard Screw-In Harley Stock Style Non-Vented Gas Cap - Left Side - 1982-1995 - Chrome
$24.32

Cycle Standard Screw-In Harley Stock Style Vented Gas Cap - 1982-1995 - Chrome
$24.32

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

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

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

Drag Specialties Fat Bob Style Gas Tanks - 1984-1999 Harley-Davidson FXST/FLST 1985-1986 FX/FXWG - 5 Gallon
$333.67

Drag Specialties 5-Gallon Fat Bob Gas Tank for 1948-1984 Harley FX/FL - Raw Steel
$330.58

Colony #3576-1 Gas Tank Rubber Divider 1936-1938 Harley-Davidson Big Twins
$18.15

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

Cycle Standard Pop-Up Gas Cap Large Diameter - Black - Dummy - 1996 - Up Harley-Davidson
1 review $40.33

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

Colony #3340-3 Gas Tank Fitting Kit 1949 Harley-Davidson Big Twins - CAD Plated
$21.27

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