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Harley-Davidson Flathead 45 & 80 Parts

"Harley-Davidson" name for reference purposes only. Not affiliated with Harley-Davidson Motor Co.

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“How to Restore Your Harley-Davidson”, by Bruce Palmer

Harley-Davidson Flathead Parts

    The parts listed here are for H-D flathead 45 & U-Series 1937-* only. Looking for a specific part for your older model H-D? These parts are listed the same way as in your Parts Manual: in H-D part-number order, where applicable. “NOS” means New Old Stock, an obsolete, original H-D Factory- manufactured part in new condition. Parts not specifically identified as “NOS” or “used” are reproductions. Parts are not returnable without prior written permission. Shipping charges: you pay the actual shipping & insurnace + $2.00 handling and packing. To order, click here for the forms: Order Forms. Payable to: “Victory Library”. PayPal payments: “sales(@)victorylibrary.com”.
    Looking for K, KH, Sportster, knucklehead, panhead, shovelhead & Evo big twin OHV, Indian, Kawasaki or British parts? Click to see the menu below: K, KH, Sportster, knucklehead, panhead, shovelhead & Evo big twin OHV, Indian, Kawasaki or British parts. Thanks for visiting!

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Part Nº

Motor Parts, Top End

Price

GEARZ

"Transmission Ratio Calculator" is in Microsoft Excel .xls format. It already includes the number of teeth on all gears and accepts engine RPM, sprocket choice, and wheel diameter as variable inputs, compares all possible internal ratio choices for RPM change on a shift (both in

Transmission ratio calculator for Triumph 4-speed, Triumph 5-speed, BSA A10 & Gold Star, BSA A65, Norton twins, Yahama XS650 twins, H-D Sportster 4-speed,  H-D Sportster & Buell 5-speed, and H-D big twin 4 & 5-speeds

percentages lost and recovered, and the actual RPM in the new gear), lowest RPM reached in the entire range, speed in MPH reached in each gear, overall gear ratio including final drive sprockets, etc. Currently available for Triumph 4-speed, Triumph 5-speed, BSA A10 & Gold Star, BSA A65, Norton twins, Yahama XS650 twins, H-D Sportster 4-speed, H-D Sportster & Buell 5-speed, and H-D big twin 4 & 5-speeds. Click the logo for complete details.

16460-40

Cylinder, Front; WL & G 1936-73 with 7/16” head-bolts (cstg. #120-36), used, no fin damage, small bore, seats & nipple OK.

100.

16822-39

Head Bolt Washer; all 1939-52 45 & 1940-48 U-series with aluminum heads, tapered type, .200” thick × 1.093” OD, black finish, excellent used condition but dirty, each (only have 11 pieces)

2.

17027-37

Gasket Set, Motor; U-Series 1937-48, complete, but without head gaskets

25.

    165-30

Exhaust Valve; all V-Series 1930-36

19.

18200-32

Valve Spring Set; WLDR & WR 1937-52, also WL 1932-40 heavy-duty, 4 pcs.

9.

18236-39

Valve Spring Cover Gasket Set; 1939-48 U-Series, 16 corks & gaskets

8.

1861X-30

Tappet Block; V & U-Series 1930-38, 45 1929?-68, top is threaded for lower covers, used, specify front or rear. Click on each picture for larger view.

Early tappet blockEarly tappet block

25.

1861X-39

Tappet Block; U-Series 1939-48, top has lip for spring-loaded clip type covers, used, specify front or rear. Sorry, I don't have a full set. Click on each picture for larger view.

1939 UL tappet block1939 UL tappet block

50.

22251-52A

Piston; all 45; +.030”, with pin and ring set (sorry, no locks) special for high-compression or pop-up, such as WR or K heads, etc. Extreme dome height (approximately std. 45 + .150” tall)

K pistonHarley-Davidson K piston

requires careful assembly, not drop-in. Not for use in stroked motors. Only 1 single piston left, sorry - not a pair. Click on each picture for larger view.

40.

22251-37R

Stroker Piston; pair, complete with rings, pin & locks, for all 45; special for Chief 4-7/16” (4.4375”), 4-1/2” (4.500”), KH 4-9/16” (4.5625”) and 4-5/8” (4.625”) stroke. Click on the picture for more details.

Truett & Osborn
Harley-Davidson 45 stroker piston

Part Nº

Motor Parts, Lower End

37T

80” Stock Flywheel set, UL; American-made quality product, original 4-9/32” (4.28125”) stroke

TorqueMonster

, for street or racing use (requires 1¼” crank-pin). Click the image for more details.

Truett & Osborn Stock Flywheels
Harley-Davidson UL 80” Stock Flywheels

UL84

84” Stroker Flywheel set, UL; American-made quality product, 4-1/2” stroke, for street or racing use (requires 1¼” crank-pin). Also available in

TorqueMonster

. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson UL 84” Stroker Flywheels

UL86

86” Stroker Flywheel set, UL; American-made quality product, 4-5/8” stroke, for street or racing use (requires 1¼” crank-pin). Also available in

TorqueMonster

. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson UL 86” Stroker Flywheels

UL88

88” Stroker Flywheel set, UL; American-made quality product, 4-3/4” stroke, for street or racing use (requires 1¼” crank-pin). Also available in

TorqueMonster

. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson UL 88” Stroker Flywheels

UL92

92” Stroker Flywheel set, UL; American-made quality product, 5” stroke, for street or racing use (requires 1¼” crank-pin). Also available in

TorqueMonster

. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson UL 92” Stroker Flywheels

45STD

Replacement Flywheel set; 45, 3-13/16” standard stroke, fits all 45 1937-73, American-made quality product, for street or racing use. Click the image for more details.

Truett & Osborn Replacement Flywheels
Harley-Davidson 45 Replacement Flywheels

45STR

Stroker Flywheel set; 45, 4-7/16” stroke (52.5”, 861cc) fits all 45 1937-73, American- made quality product, for street or racing use. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson 45 861cc Stroker Flywheels

45STR2

Stroker Flywheel set; 45, 4-1/2” stroke (53.3”, 873cc) fits all 45 1937-73, American-made quality product, for street or racing use. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson 45 873cc Stroker Flywheels

45STR3

Stroker Flywheel set; 45, 4-5/8” stroke (54.7”, 897cc) fits all 45 1937-73, American-made quality product, for street or racing use, perfect fit for KH barrels and KH pistons. Click the image for more details.

Truett & Osborn Stroker Flywheels
Harley-Davidson 45 897cc Stroker Flywheels

Click here for other Harley-Davidson stroker flywheels

Knuckle, Panhead
1941-54
Pan, Shovelhead
1956-71
Shovelhead,
Evo 1981-*
Sportster
1957-*
80”
82”
84”
86”
88”
80”
82”
84”
86”
88”
86”
89”
91”
4-1/2”
4-5/8”
4-3/4”

23900-37V

Flywheel Set, 45; all 45 1937-73, flywheel OD reduced by 9/16” (to 7-5/16”) for lighter weight & better acceleration, requires rebalancing, used.

45.

23966-36

Crank-Pin Nut; all U-Series 1937-48 1937-48, NOS, pair

12.

23985-00V

Shaft Key, Offset; all twin motors 1912-*, available in offset of .010”, .030”, .040”, .050” (you must specify which), each. Chrysler key, requires modification for use in H-D motors, click here for the article on installation:  Not returnable!

7.

24294-32

Connecting Rod Male; all 45 1937-*, bare, used, rebuilding required

10.

24365-29

Crank-Pin Roller Retainer (cage); all 45 used, condition excellent, each, (motors use 4)

3.

    301-36

Crank-Pin Roller Retainer (cage); all big twin U-Series 1937-39 (¼” rollers), NOS

6.

    305-15

Crank-Pin Roller, Male; all 1915-39 twins (JD, V & U-Series), .726” x ¼”, +.0006 or +.0008” only, (JD & V-Series use 12, 1937-39 U-Series use 14), NOS, each 

2.

24371-29A

Crank-Pin Roller Set; all 45, rollers only in std.

15.

24375-29A

Crank-Pin Roller Set; all 45, rollers only in +.001”

15.

24371-71

Crank-Pin Roller Set; 3/16” for aluminum cages only, all UL 1937-48, +.0004”

15.

C8165-19

Motor Mount Hardware Kit; Colony cadmium reproduction of 1936-69 OHV upper & lower mount parts: 5 special bolts, 6 special nuts, 7 washers, cotter pins

29.

24509-39Z

Crankcase; 45 1939-73, used, matched pairs & singles, in condition from rough (needs complete rebuild, some non-structural corrosion, bad studs, races, etc.) to very good, but very few left. None with titles or notarized bill of sale; invoice will only list “used crankcase set”. Click here for details: 

250.
-400.

24585-39A

Right Main Bearing Race; 45 1939-73, +.005” oversize OD (this will be necessary if the old race spun, was rusted in place, etc.)

10.

24595-40

Right Main Bearing Race; U-Series 1940-48 (snap-ring type)

32.

24645-37

Pinion Roller Retainer Set; all 45, set of 2, used, dirty but OK

10.

24699-37

Gear Shaft Seal Spring Ring; all 45 + OHV 1939-*, NOS

2.

24702-40

Retainer, Main Race; U-Series 1940-48

1.

24921-37

Gasket, Breather Pipe; all 45 & U-Series 1937-* 4 pieces for 

1.

Part Nº

Cam Covers

Price

25201-37

Cam Cover; 45 1937-58; (fits 1959-73 if early #2 cam is used), used.

50.

Part Nº

Cam Chest & Oil Pump Parts

Price

25776-37

Generator Idler Gear; all 45, used

15.

26244-37

Gasket, Feed Pump; all 45 & U-Seriesget for 4 for

2.

Part Nº

Cams, Used

Price

25511-37

Intake Cam, Rear; #2, all U-Series, used, minor surface pitting

50.

255XX-37

Various 45 Cams; used, specify which (#1, 2, etc. or front exhaust, etc.), some have no journals, depending on condition, etc. prices range from

10.

Note: For re-grinds on your 45 or UL cams, click here for KNS Cycle's Hot Cams: 

Note: We have NO WR, WLD, WLDR, VL, OHV, etc. cams. Only as shown, sorry.

Part Nº

Intake System

Price

27034-41

Inlet Pipe Extension; all 1¼” carbs, this .430” thick spacer has the big M-51 & M-88 3-bolt pattern, has the proper locating lip & recess, and fits between carburetor & manifold - use it as a spacer

Inlet
Pipe Extension

to improve top-end power, or as a base flange for custom Mikuni or SU adapter, NOS, only 1 left! Click on the images for a larger view.

19.

27285-59

Throttle Body; Linkert DC for 1959-65 Servi-Car, used, casting repaired

5.

Linkert Books and Parts

 Click here for my Linkert Book & Parts for your Model M or DC type carburetor

Mikuni Carburetors and Parts

 Click here for Mikuni VM Carburetors & Parts for 30-44mm “GP”, “HS40” carburetor

00109

“View-All” Gas Filter; chrome & glass, for ¼” gas line

3.

Part Nº

Ignition & Charging

Price

  4521-26

Switch Key; all twins 1926-36, aluminum replica. Click the image for a larger view.

Harley-Davidson switch key

1.

32515-05

Distributor Clamp; 1-stud Delco style for auto-advance or magneto, with stud & nut. New gary Bang replica. Click the image for a larger view.

Harley-Davidson Distributor Clamp

5.

32586-65A

Distributor Cover Assembly; auto-advance top cover (sorry, tach drive fitting does not work), fits all Servi-Car® 1966-73, XL 1966-70 with drive hole in shaft, used

25.

32605-48

Point Set; all twins 1948-69 (except magneto)

2.

Part Nº

Transmission, Clutch, Sprockets & Chains

Price

34702-41X

Transmission Case; 45 1941-63, used, with minor repairable damage, some have races, brackets, etc. Prices from:


50.

99892-82

Transmission Oil; genuine H-D oil for all late big twins, quart

5.

37550-41

Clutch Hub with Studs; U-Series 1941-48

40.

40096-29

Primary Chain Repair Link; all 45, for 35-2 chain, includes 2 master links, lengthens and repairs the original 96 or 100 link primary chain, NOS

Harley-Davidson 45 primary repair link

9.

435XX-30

Tire, Front or Rear, 19”; this is a brand-new, never mounted 120/90-19 Cheng Shin C833 Marquis tire. The tread width is huge: 120mm = 4-3/4” wide. It's also very tall, gives excellent ground

120/90-19 tire

clearance for those short springers, etc. - 27-1/2”. They're “H” rated for 130 MPH. I bought these for my own bike, but decided to use something else, so I only have these 2. Price shown is for one tire; if you want both double the price. These will be shipped bare, with just a tag label (not boxed). Click for details.

35.

43578-35

Brake Roller Retainer; star hubs 1936-66, brake side (14 slot), used

3.

44225-30

Front Brake Shackle Stud; all springer brake 1930-57, NOS

15.

44401-49A

Front Brake Shoe; ’Glide front drum Servi-Car 1958-1971, used, pair

9.

45668-30A

Rocker Bushing Set; 45 solo 1930-52, Servi-Car 1932-40, set of 4, (if worn, will cause wheel wobble & other handling problems), NOS

35.

456XX-3X

Stud, Miscellaneous; NOS & used studs, give exact description for price quote

 

45677-30

Rear Rocker Stud; special long stud for 1932-40 Servi-Car with tow-bar, & 1930-1952 45 solo with front stand or tow-bar, NOS

10.

46718-48

Pressure Disc, Damper; 1949-* ’Glide, etc. used

1.

46727-48

Friction Washer, Damper; 1949-* ’Glide, etc. NOS but dirty

1.

46730-48

Anchor Plate, Damper; 1949-* ’Glide, etc. used

1.

46746-49?

Knob, Damper; 1949-* ’Glide, etc. stamped star shape, bent, good threads

1.

50036-36U

Kick-stand Return Spring Plate; all big twin 1936-*, holds return spring to side stand, used

3.

50036-36

Kick-stand Return Spring Plate; all big twin 1936-*, holds return spring to side stand, chrome repro by Gary Bang. Click the picture for a larger version.

Harley-Davidson Kick-stand Return Spring Plate

6.

50528-39

Right Footboard Sidebar; all 45 1939-*, holds brake pedal, etc. This is bent where you see it, could be fixable or cut it up to make

Harley-Davidson 45 Right Footboard Sidebar45 Right Footboard Sidebar

shorter controls for your WR replica or bobber - don't sacrifice a good one. Click the pictures for a larger version.

10.

51900-06

Solo Seat Nose Bracket; used as shown. Black steel. Length: 6-1/4”. Tongue is 5/32” thick × 1-1/2” wide with 2 slots 5/16” by 15/16”. “U” inside width is 1-3/4” with 5/16” holes. Click the thumbnail to see more details.

Solo Seat Nose Bracket

8.

52567-36

Helper Spring & Bracket; buddy seat; all big twins, used.

30.

54012-33A

Friction Ride Damper Disc; 45 1939-45, big twin 1936-45, used. This is actually a 54012-33 friction disc cup with a 54014-33 friction disc inside. Sorry, only have 1. Click the

Friction Ride Damper DiscFriction Ride Damper Disc

thumbnail to see more details (2 pictures are inside & outside).

5.

56104-52

Handlebar Clamp; Servi-Car 1960-*, black, used. Click the thumbnail to see more details (2 pictures are inside & outside).

Harley-Davidson Glide Handlebar Clamp

9.

56165-49

Link, Riser (Clamp Top Plate); Servi-Car 1958-59, used, bad chrome. Click the thumbnail to see more details (2 pictures are inside & outside).

Harley-Davidson Glide Link, Riser (Clamp Top Plate)

5.

62576-68

Clutch Cable Bracket; mounts 1968-* (mouse-trap eliminator) cable on 1936-67 big twins, chrome, mfg. by Paughco. Click the thumbnail to see more detail.

Harley-Davidson Clutch Cable Bracket

9.

63840-53

Oil Filter Element; 1953-*, Sifton replacement for in-tank filter

1.

65445-37

Front Exhaust Pipe; U-Series 1937-48, repro, good start for high-performance 2-1 set as described in “U-Series Exhaust System”, plain finish

10.

65000-06

Exhaust Pipe Baffle Inserts; 1½” “beer can opener” style, fits all 45, very dirty, probably used but OK. Click the thumbnail to see more details.

Exhaust Pipe Baffle InsertsExhaust Pipe Baffle Inserts

5.

Part Nº

Electrical & Instruments

Price

67810-36

Springer Headlamp Bracket; 45 1940-57, big twin 1936-48, original piece with the top and front cut off as shown, 4 remaining bolt holes give you a start for a

Springer Headlamp Bracket Springer Headlamp Bracket Springer Headlamp Bracket

custom bracket, save some trouble. Click the thumbnails to see more detail.

3.

67810-05

Custom Dual Headlamp Bracket; has slotted base to fit different bolt pattern, chromed steel plate but very dirty, probably used, holds 2 custom lights

Glide Headlamp BracketGlide Headlamp Bracket

vertically (one above the other). Click for details (2 pictures are inside & outside).

5.

69130-36

Upper Horn Bracket; big twin 1936-48, + 45 1940-52, NOS. Click the thumbnail to see more details (2 pictures are inside & outside).

Harley-Davidson NOS 1936-48 Upper Horn Bracket

25.

Part Nº

Miscellaneous

Price

K-01

Mag 16” Rear Wheel & Tire; heat-treated cast aluminum wheel & Continental “Super- Twin” TK44 130V16 (5.10) tire are brand new but dirty, never

Kawasaki H2 rear mag wheelKawasaki H2 rear mag wheel

mounted on a bike, cast-in iron drum surface needs some light sanding. No other parts included. Excellent choice for 45 solo - side-mounted sprocket allows wide range of gearing choices, down to 36 tooth (5 less than 45 solo sprocket, equivalent to 39 teeth from your 34 tooth motor sprocket) for very high top speed. Compare this price to a star hub wheel & 45 solo rear drum. The dark shapes are the original rubber cush drive bumpers, which are not included. Click the thumbnails to see larger pictures.

99.

K-02

Mag 16” Rear Wheel & Tire; heat-treated cast aluminum wheel & Continental “Super- Twin” TK44 130V16 (5.10) tire are brand new but dirty, never

Kawasaki H2 rear mag wheelKawasaki H2 rear mag wheel

mounted on a bike, cast-in iron drum surface needs some light sanding. Complete with good used original sprocket carrier, sprocket, brake backing plate, brake shoes, rear axle, spacers - ready to go on your early H2 (I also have a Z1 axle - this will fit early Z1, KZ900 too). Excellent choice for 45 solo - side-mounted sprocket allows wide range of gearing choices, down to 36 tooth (5 less than 45 solo sprocket, equivalent to 39 teeth from your 34 tooth motor sprocket) for very high top speed. Compare this price to a star hub wheel & 45 solo rear drum. The dark shapes are the original rubber cush drive bumpers, which are included. Click for details.

199.

H-01

Rear Wheel, 16” Complete; Honda 360 36 spoke rear wheel, used, with brakes, axle, etc.; includes new (but not perfect wide chrome H-D

Honda 360 rear wheelHonda 360 rear wheelHonda 360 rim

style 3” wide WM3.5 rim & spokes. Assembly required, excellent choice for 45 solo - side-mounted sprocket allows wide range of gearing choices, including 36 tooth for very high top speed. Slight rust inside bead area of wheel, other minor rust. Click the thumbnails to see more details.

50.

H-03

Disc Brake Front Fork; Honda 360, with 18” WM2 wire wheel, disc brake rotor, caliper, brackets, bars, speedo, master, etc., excellent used; complete except for lower tree and stem.

50.

H-04

Honda 750 Disc Brake; hub, rotor, caliper, used (individual parts also).

25.

H-05

Honda 750 Disc Brake Wheel; 19” WM2 assembled front wheel, complete with rotor, caliper, etc., used.

50.

00174

“Chrome Guard”; coating by Custom Chrome, prevents pipes from turning blue

15.

00001

“Harden-It”; special easy-to-use chemical to help you heat-treat or harden valve stem ends, lash caps, tappet screws, re-contour screwdriver blades, flat tappets, punches, knives, many other tools & gun parts, enough for 10-20 uses, complete with instructions

2.

00106

Coil Cover; fits over coil on rigid frame, used, chrome but dirty

2.

00051

PJ1 “Balance Plus”; tire sealer & balancer

4.

 

Motor Oil; H-D factory 20W50 oil, quart

4.

10002

Motor Oil, “Oilzum”; traditional H-D 60-wt. heavy oil, quart, each

2.

00113

Lubritech Racing Gear Oil; ATF grade, quart, each

1.

00114

Kal-Gard Fork Oil; Smooth Stroke SAE 10, 16 oz.

1.

00116

Flex-Stone; flexible point file, great in tool pouch for on-the-road adjustments

1.

00109

“View-All” Gas Filter; chrome & glass, for 1/4” gas line

2.

PicoSearch

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Order Form

Foreign
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Click the text to go directly to a specific part, or scroll down to see parts in H-D part number order.
 Stroker Flywheels
 British Parts
 45 Crankcases For Sale
 Knuckle & Panhead Parts
 45 “Basket Case” Motor
 Linkerts & Parts
 Order Forms
 Motor Parts, Top End
 Ignition & Charging
 Books & Manuals
 Motor Parts, Lower End
 Trans, Clutch, Sprockets
 Sale Items
 Honda & Kawasaki Parts
 Chassis, Wheels & Brakes
 K, KH & Sportster Only
 Cam & Oil Pump Parts
 Electrical & Instruments
 Indian Parts & Literature
 Intake System
 Miscellaneous
 1930-36 VL Parts
 1932-36 RL Parts
 Amazon Books

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