Indian Motorcycle Parts Data

This page includes a compilation of some of the most common Indian motorcycle parts, hardware and electrical data. Contact Us if you find an error or want to add information.


Tap and Die Sizes for Indian Threaded Parts
Motor PartsModelSpecialSize
Timing Inspection Plug AllYes3/4"-24
Tappet Adjusting Bolt & Nut AllYes9/32"-32
Lower Timing/Sump Plugs AllNo 1/8" NPT-27
Motor Sprocket Nut ChiefYes5/8"-24
Crank Shaft (Rod) Nuts ChiefYes3/4"-24
Flywheel Shaft Nuts (Pinion/Drive @ Flywheel) Chief Yes5/8"-24
Pinion Gear Nut (Left Hand ThreadChiefYes3/8"-24L
Cylinder Studs All No 3/8"-24
Oil Pump Gear (On Cam) All No 7/16"-20
Oil Pump/Sump Elbow Jamb Nuts AllYes7/16"-24
    
Primary Drive   
Chain Inspection/Filler Plugs All Yes 3/4"-24
Bottom Drain Plug All No 1/8" NPT-27
Clutch Arm Nut (On Worm) All Yes 1/2"-24
Lower Rear Primary Bolt (Into Transmission) Chief No 1/4"-20
Clutch Pressure Plate Nuts All No 5/16"-24
Clutch Driver Hub (Left Hand ThreadAll Yes 5/8"-24L
    
Linkert/Schebler Carburator Parts   
Parts Diagram LinkertNoHere
Adjustment Procedure LinkertNoHere
Float Bowl to Body Nut All LinkertYes3/4"-20
Needle Seat to Bowl All LinkertNo7/16"-20
Needle Seat to BowlScheblerYes13/32"-24
Needle Seat to Bowl (Shouldered Bowl Models Only)ScheblerYes3/8"-24
Fuel Line to Needle/SeatAll LinkertYes7/16"-27
Fuel Line to PetcockAll L/SYes7/16"-24
Butterfly Retaining ScrewsAllNo#6-32
Idle/Hi Speed Adjusting Needles All LinkertYes1/4"-40
Idle Passage Plug & Fixed JetsAllNo#8-32
Manifold Screws (Counter Sunk Oval Head) All Linkert No5/16"-18
Air Cleaner Screws (Fillister) All LinkertNo#12-24
Air Cleaner Screws (Air Horn)ScheblerNo#10-24
Bowl Top Plug (Over Needle & Seat) All Linkert Yes 
Bowl Top Plug (Over Needle & Seat)ScheblerYes9/16"-24
Float Pivot & Drain Plug All Linkert No1/4"-32 
Idle Body PlugAll LinkertYes5/16"-32
Idle Body PlugScheblerYes5/16"-24
    
Transmission Parts   
Bottom Drain Plug AllNo1/8" NPT-27
Transmission To Engine ChiefNo7/16"-14
Tower Bolts ChiefNo1/4"-20
Clutch Sprocket Nut (Inside Transmission) AllYes1-3/8"-24
Drive Sprocket Nut AllYes1-3/16"-24
Kick Gear Nut (On Trans Mainshaft) AllYes1/2"-24
Bellcrank Nut (Shift Arm On Tower) ChiefNo3/8"-24
    
Chassis Parts   
Grease Zerk Fittings AllYes5/16"-32
Shock Cover Set Screw ChiefNo#10-32
Rocker Clutch Pedal Castle Nut AllNo1/2"-20
Front Motor Mount Nut ChiefNo5/8"-18
Handlebar Control Sleeve Nuts AllYes1-3/8"-24 
Fuel Tank Oil Fittings (At Tank) AllNo1/4" NPT
Fuel Shutoff Valve (At Tank) AllNo1/8" NPT-27
Brake Pedal Pivot Bolt (Pre 40)ChiefYes1/2"-24
Brake Pedal Pivot bolt (40-53)ChiefNo9/16"-18
Brake Rod Pivot (Shoulder Bolt At Frame)ChiefNo7/16"-20
Tank Emblem Screws ChiefNo#2-56
Shock Nuts (Top & Bottom of shaft)ChiefYes5/8"-24
Shock Nuts (top & bottom of shaft) Scout No 7/16"-20 
Chief Main Motor Mount Bolt Chief No 5/8"-18 
    
Fork Parts   
Fork Stem (Leaf Fork) ChiefYes1-1/8"-24
Fork Stem (Girder & Telo) ChiefYes15/16"-24
Girder Chief Link Nuts ChiefNo7/16"-20
Scout Fork Link Rod Nuts ScoutNo1/2"-20
Leaf Spring Rocker Nuts (Originals Pre 1940) ChiefYes1/2"-24
Leaf Spring Rocker Nuts (Originals 1940 & Later)ChiefNo1/2"-20
    
Electrical Parts   
Generator Drive Pulley Nut (at primary)AllNo5/16"-24
Generator Drive Pulley Nut (at generator)AllNo7/16"-20
Adjustable Point Contact & Nut AllYes3.5x.6 mm
    
Wheels & Hubs(see Offset in "Misc Data")   
Front Axle Nut (Girder & Telo Models) ChiefNo5/8"-18
Front Axle Nut (Leaf Models) ChiefNo9/16"-18
Rear Axle Nut ChiefNo9/16"-18
Rear Brake Drum Brg Nut (37-53) Left Hand ThreadChiefYes 
Front Brake Drum Brg Nut (37-45) Left Hand ThreadChiefYes 
Front Brake Drum Brg Nut (46-53) Right ThreadChiefYes 
Front Hub To Drum Lugs 46-53 ChiefNo5/16"-24
Rear Hub To Drum Lugs 37-45 (also Front for 37-45) ChiefNo3/8"-24
Rear Hub To Drum (Studs & Internal Hex Nuts) 46-53ChiefNo5/16"-18/24
Rear Hollow Axle Nut ChiefYes7/8"-24
Front Brake Adjuster & Lock Nut (35-53) All Yes 1/4"-24 
Anything over 3/4", is marked as "Special Thread"
   

Parts Cross Reference
Part DescriptionPart NumberSource/Brand
Generator Drive Belt (Plunger Frame Chief)4L210Auto Store
Indian Spark Plugs (4093 is non resistor as original)4093 or 303Autolite
6 volt tail light bulb (in line pins)1158Auto Store
6 volt tail light bulb (offset pins for repro light)1154Auto Store
6 volt Corbin Speedo Bulb (Threaded)40Auto Store
12 volt Corbin Bulb (Threaded)1487Auto Store
6 volt fender lamp bulb (bayonet)63Auto Store
6 volt instrument bulb (bayonet)51Auto Store
Rotor (Chief/Scout)AL32NAPA
Points (Chief/Scout)CS709NAPA
Condenser (Chief/Scout)RR174NAPA
Distributor Cap (4 Cyl)AL31NAPA
Distributor Cap (Chief/Scout)AL143NAPA
Coil 6 volt (internal resistor)GC88Sorensen
Coil 12 volt (internal resistor)UF-3Standard
Coil 12 volt (internal resistor)IC14SBNAPA
48+ Regulator 6 volt (some mods required for indicator light)VR-755NAPA
Pre 48 6 volt cutoutCU3Echlin

Bearings and Seals
Bearing Part Number / LocationNew NumberBrand
Vertical Model Bearing List Here
SS Front Wheel Bearings (cup/cone)09194/09074Timken
SS Rear Wheel Bearings (cup/cone)1729/1779Timken
24B40 / Throw Out Bearing (no races) Balls in Retainer17J02INA
38854 / Scout lower fork stem bearing (cup/cone)08125/08231Timken
39923 / Transmission Main Shaft Bearings (Chief) 6207Fafnir
762010 / Transmission Output Seal16168 CR 
40446 / Chief Wheel Bearing 36-535205-2RS1SKF
37605 / Chief Wheel Seals CR 
44046 / Brake Drum Bearing 37-53 Chief5205SKF
189010 / Lower Fork Stem 46-53 Chief7206SKF
189005 / Upper Fork Stem 46-53 Chief7205SKF
38854 / Lower Fork Stem (Leaf Models) Chief08125/08231Timken
C18120 / Upper Fork .250 Ball Bearings (21 reqd) Pre-46 Chief Any
191017 / 46/47 Girder Needle Bearings Use Bushings 
100631 / Distributor Thrust Washer (2 Req'd)TWA815INA
102481 / Distributor Bushing (2 Req'd)  
100229 / Generator Bearing (Drive Side)6202SKF
100226 / Generator Bearing (Comm End) 6201SKF
39313 / Generator Drive (at inner primary) Needle BearingB810Torrington
Seal For Above Generator Drive BearingCR4911CR
Vertical "Off The Shelf" Parts List (see Misc Data for more Vertical info) Here

Misc. Data
Chief wheel offset from Face of Hub on non brake side, to Rim centerOffset
37-45 Chief2-15/16"
46-53 Chief2-5/16"
35/36 Chief (18") one piece drum/hub2-11/16"
Scout wheel offset from brake drum face to edge of RimOffset
40 Sport Scout & 741 with 18" rims FRONT1-1/8"
40 Sport Scout & 741 with 18" rims REAR1-1/2"
42 Sport Scout with 16" rims FRONT3/4"
42 Sport Scout with 16"rims REAR1-1/8"
  
Autolite Tag Date CodingHere
Autolite Generator Maintenance ManualHere
Drill Size To Decimal Equivalent ChartHere
Drill & Tap Hole Size GuideHere
Vard Fork DrawingsHere
Vertical Parts (Covers 149 Arrow, 249 Scout, Warrior & TT)Here
Transmission Installation and AlignmentHere
Bolt Charts By ModelHere
Edison RM Magneto Owners ManualHere
YUASA Battery ApplicationsHere
Shorai Battery SpecificationsHere
  
Wiring Diagrams in PDF Format 
1914 Hendee Special (wiring, frame & starter diagrams in one) 2.22mbHere
20-28 Models (Chief, Scout & Prince) 467kHere
1927(?) Indian Ace Four Cylinder 36kHere
1928-1931 101 Scouts (All 3 diagrams) 265kHere
1932 Models 203, 303, 403 & 503 All In One 178kHere
1938 Models (338, 438, 638) Chief, Four &Scout 61kHere
1939 Models (339, 439, 639) Chief, Four & Scout 66kHere
Sport Scout (most later model 45" Scouts) 70kHere
340/344 Military Chief With Black Out Lighting 337kHere
640/741 Military Scouts With Black Out Lighting 323kHere
841 Military Experimental Model With Blackout Lighting 673kHere
1941 & 42 Indian Four Cylinder (441/442) 73kHere
340-346 Chief Models With Cutout Charging System & Ammeter 153kHere
348-353 Chief Models With Voltage Regulator and Charge Light (48-53) 259kHere
149/249 Models (possibly Warriors too) 71kHere

Torque Specifications

Use as a general guide only. In most cases, you can use the grade 6 ratings for nut & bolt applications. Be aware of the materials you are fastening into, as this affects the safe torque range. Example: The 1/4" primary bolt that threads into the alloy transmission housing should not be torqued to 10 ft/lbs or you may strip the threads.

General SAE Bolt Torques
SAE Bolt GradeGrade 1 & 2Grade 5Grade 6Grade 8
Bolt Diameter
 1/4 5 ft/lbs7 ft/lbs 10 ft/lbs10.5 ft/lbs
 5/16 9 ft/lbs14 ft/lbs 19 ft/lbs 22 ft/lbs
 3/8 15 ft/lbs25 ft/lbs 34 ft/lbs 37 ft/lbs
 7/16 24 ft/lbs40 ft/lbs 55 ft/lbs 60 ft/lbs
 1/2 37 ft/lbs60 ft/lbs 85 ft/lbs 92 ft/lbs
 9/16 53 ft/lbs88 ft/lbs 120 ft/lbs 132 ft/lbs
 5/8 74 ft/lbs120 ft/lbs 167 ft/lbs 180 ft/lbs

Indian Specific Bolt Torques
Head Bolts 7/16"50-55 ft/lbsCylinder Base Nuts35 ft/lbs
Z Flyweel Shafts100-105 ft/lbsIron Flywheel Shafts75 ft/lbs

Linkert Nozzle Applications

Linkert 1-1/4" Carburetor Nozzle (from Victory Library)
Carb NumbersModel UseHole Pattern (top to bottom) Drill #ID
M640-64845" Scout#59 #59 #59 #48 #48#37
M340-34874" Chief#57 #57 #57 #48 #48#36
M350-35380" & Bonnie Chief#55 #55 #55 #55 #55#29
Linkert Nozzle Info From Carbs In Use (modified)
Carb ModelModel UseHole Pattern (Top to Bottom)ID
M34x74" Chief#57 #57 #57 #48 #48#36
M35x80" & Bonneville#55 #55 #55 #55 #55#29
M641Scout#52 #52 #54 #54 #54#28
M34174" Chief#57 #57 #57 #48 #44#36
M34474" ChiefN/A #57 #57 #48 #44 #27
M34474" Chief#57 #57 #57 #45 #43#36
M34474" Chief#54 #54 #54 #54 #54#28
M35080" Chief#57 #57 #57 #48 #44#36
M35080" Chief#54 #54 #54 #54 #54#28
M35280" Chief#57 #57 #57 #46 #44#36