HSR48 AKA TM48-2 Data Set
| Position | Part Number | Description |
| 1 | C5=410-B C5=410-B |
Screw: Carb Top |
| 2 | CW2=0414 CW2=0414-B |
Screw: Carb Top |
| 3 | 776-39005 | Carburettor Top (TM42, TM45) |
| 3a | 111-776-001 | Carburettor Top (TM48) |
| 4 | TM42/04 | Gasket: Carb Top |
| 5 | TM32/90 | E-clip: Jet Needle |
| 6 | 826-03002 | Washer: Jet Needle |
| 7 | J8-##### | Jet Needle |
| 8 | TM42/03 | Throttle Valve Link |
| 8a | TM42/08-1A | Throttle Valve Link |
| 9 | B40I/56 | E-clip: Throttle Valve Link |
| 10 | B40I/10 | Shim: Throttle Valve Link |
| 11 | 834-23041 | Pivot: Throttle Valve Link |
| 12 | TM42/08 | Throttle Valve |
| 13 | 739-13002 | Screw: Jet Needle Retainer |
| 14 | TM42/16 | Retainer: Jet Needle |
| 15 | TM42/13 | Seal Ring (TM42, TM45) |
| 15a | TM42/08-1A | Seal Ring (TM48) |
| 16 | TM42/10 | Seal: Throttle Plate |
| 17 | 925-98006 | Jockey Wheel: Throttle Cable |
| 18 | 53974 | E-clip: Jockey Wheel |
| 19 | TM42/51 | Bracket: Throttle Cable |
| 20 | B3=0520-B | Screw: Bracket |
| 21 | VM28/204 | Spacer: Bracket |
| 22 | TM42/38 | Locking plate |
| 23 | C2=0514-B | Screw: Carb Body |
| 24 | 640-12001 | Retainer: Cold Start |
| 25 | VM14/241 | Spring: Cold Start |
| 26 | N189192 | Plunger: Cold Start |
| 27 | TM42/06 | Carburettor Body: TM42 Front |
| 27a | TM45/06 | Carburettor Body: TM45 Front |
| 27b | TM48/06 | Carburettor Body: TM48 Front |
| 28 | 616-94029 | Seal: Carb Body |
| 29 | 925-19011 | Spring Seating Ring |
| 30 | TM42/43 | Cam: Pump Rod |
| 31 | N138019 | Roll Pin: Throttle Bellcrank |
| 32 | TM42/48 | Throttle Bellcrank |
| 33 | M12F/46-BB | Spring: Pump Stop |
| 34 | MC-0316-B | Stop Screw: Pump |
| 35 | TM42/47 | Spring: Pump |
| 36 | N/A | Carburettor Body |
| 37 | B36/95 | Shim: Throttle Valve Link |
| 38 | TM42/36 | Screw: Adjust Pump |
| 39 | B30/205 | O-ring: Pump Adjuster |
| 40 | TM40/89 | Lifting Arm Screw |
| 40a | TM42/17 | Locking plate |
| 41 | BN38/43 | Roll Pin: |
| 42 | TM42/46 | Crank: Throttle Return |
| 43 | B30/1069 | Spring: Throttle Stop |
| 44 | N3=04 | Nut: Throttle Stop |
| 45 | TM42/19 | Spring: Throttle Valve Return |
| 46 | 700-15012 | Throttle Shaft |
| 47 | TM42/15 | Retaining Plate: Fuel Pipe |
| 48 | C2=0410-B | Screw: Retainer for Fuel Pipe |
| 49 | 604-26014 | Pilot Air Screw |
| 50 | N133206 | Spring: Pilot Air Screw |
| 51 | VM12/205 | Washer: Pilot Air Screw |
| 52 | N1333037 | O-ring: Pilot Air Screw |
| 53 | TM40/27 | Fuel Pipe |
| 54 | KV/10 | O-ring: Fuel Pipe |
| 55 | B30/398 | Shim: Tickover Screw |
| 56 | VM22/138 | Washer: Tickover Screw |
| 57 | 730-09018 | Spring: Tickover Screw |
| 58 | 925-15001 | Spring Seat: Tickover Screw |
| 59 | TM42/32 | Tickover Screw (Long) |
| 59a | 990-605-065 | Tickover Screw (Short) |
| 60 | BS30/97-0.0 | Air Jet |
| 61 | 784-430000-size | Needle Jet |
| 62 | TM42/11-size | Pump Nozzle |
| 63 | N124063 | O-ring: Pump Nozzle |
| 64 | VM28/486-size | Pilot Jet |
| 65 | TM42/12 | Spacer: Main Jet (TM42, TM45) |
| 65a | TM42/12-1A | Spacer: Main Jet (TM48) |
| 66 | N100604-size | Main Jet |
| 67 | 616-33003 | O-ring: Float Valve Seat |
| 68 | VM13/216 | Screw: Retaining Float Valve Seat |
| 69 69A |
786-27001-size 786-27001-1A-Size |
Float Valve Assy (TM42-6,TM45-2) Float Valve Assy (TM48-2) |
| 70 | 859-32027 | Floats |
| 71 | NV26/22 | Pivot: Floats |
| 72 | C2=0410 | Screw: Retaining Float Pivot Pin |
| 73 | 616-94028 | Seal: Float Bowl |
| 74 | TM42/05 | Float Bowl |
| 75 | N122028 | Hose: Overflow |
| 76 | VM28/254 | O-ring: Drain Screw |
| 77 | TM32/41 | Drain Screw |
| 78 | C2=0412-B | Screw: Float Bowl |
| 79 | TM36/44-1A | Pump Rod |
| 80 | TM36/64 | Dust Cover: Pump Rod |
| 81 | TM36/60 | Piston: Pump |
| 82 | VM14SC13/89 | Spring: Pump Piston |
| 83 | N198063 | Cap: Vacuum Fitting |
| 84 | TM29/31 | Cold Start Assy (Knob Type) |
| 85 | 990-662-002 | Cold Start Assy (Cable Type) |
| 86 | VM12/43 | Dust Cover: Cold Start |
HSR48 Notes
Mikuni recommend that engines producing more than 120 hp should use an electric fuel pump at less than 4psi with the 2.3mm float valve assy
The carb can be mounted using the HS42/062-48 manifold. This should fit an S&S ‘G’ manifold but it will add a little extra to the total length of the installation.
| MOUNT TYPE | Spigot | MAIN JET | N100604-Size | 190 |
| TICKOVER POSITION | Left | PILOT JET | VM28/486-Size | 25 |
| COLD START POSITION | Right | NEEDLE JET | 784-430000-Size (723) | Y-6 |
| COLD START TYPE | Cable | JET NEEDLE | 8CFY2-97 | Clip groove #3 |
| AIR SCREW POSITION | Left | STARTER JET | Fixed | — |
| FLANGE PITCH (MM) | — | PILOT AIR JET | — | — |
| CLAMP DIA (MM) | — | PILOT AIR SCREW | VM20/584-Size | — |
| FRONT SPIGOT DIAMETER (MM) | — | MAIN AIR JET | BS30/97-Size | 0 |
| REAR SPIGOT DIAMETER (MM) | — | POWER JET | — | — |
| LENGTH (MM) | — | THROTTLE VALVE | — | — |
| HEIGHT OVER BORE CENTRELINE (MM) | — | FLOAT VALVE | 786-27001-1A-Size | 4.5 |
| HEIGHT UNDER BORE CENTRELINE (MM) | — | PUMP NOZZLE | TM42/11-Size | 0.70 |
| FUEL INLET POSITION | Left | — | — | — |
| FLOAT HEIGHT (MM) | 18 | — | — | — |
| FUEL SPIGOT (MM) | 8 |