Mikuni HSR Carburetors Parts



HSR Dealer Jet Kit
(KHS-025) for HSR42
44pc in Jet Box, 2 each of 150- 170 Main Jets, 2 each of 20- 32.5 Pilot Jets, 1 each of -96, - 97, -98 needles, 2 each of #60 Accelerator Pump Nozzle, and Needle clips, and washers.
Order No. 002-983
Jet Needles
Order No. HSR42 Order No. HSR45/48
007-080 J8-8DDY01-95 007-100 J8-9CFY02-95 Richer
007-081 J8-8DDY01-96 007-101 J8-9CFY02-96 Richer
007-082 J8-8DDY01-97 007-102 J8-9CFY02-97 Standard
007-083 J8-8DDY01-98 007-103 J8-9CFY02-98 Leaner
Standard HSR42/45 Jet Needle straight diameter is 2.96mm. This portion of the
jet needle affects tuning from idle to approximately 1/4 throttle opening.



Choke Cable
Order No. Description
002-983 Choke Cable (990-662-002)




Air Box Adapter
Order No. Description
007-450 Airbox Adapter
007-453 Scerws (3 required)
007-454 O-Ring
**Sold Separate**
HSR Carburetor Rebuild Kit
Order No. Description
002-989 HSR 42/45 Rebuild Kit (KHS-016)
002-982 HSR 48 Rebuild kit (KHS-031)




Accelerator Pump Nozzle
Order No. Mikuni No. Description
007-487 TM42/11-70 Standard
007-486 TM42/11-60 Leaner
007-485 TM42/11-50 Leanest


Short Idle Screw (Optional) See item #55 in exploded view of carburetor.
007-487 Short Idle Screw (990-605-065)
NOTE: Do not modify the idle screw or any of its component pieces. If the
screw is removed, be sure it is re-installed with the components in place as illustrated.



Performance Manifolds
Order No. Mikuni No. Description
007-459 HS42/017-45 1984-Present EVO
007-457 HS42/061-45TC Twin Cam


Air Filter Mounting Bracket
Order No. Description
007-465 HS42/019




Evolution Head Breather Kit (Optional)

1991 to present Sportsters & 1993 to present 1340 Evolution.
Order No. Mikuni No. Description
002-984 KHS-020 Head Breather bolt kit
002-981 KHS-030 Twin Cam 88/ 95 Head Breather Kit




Cable Bracket (Low)
Order No. Mikuni No. Description
007-294 TM42/34A Cable Bracket
Lowers cable for large fuel tanks
For Old Style HSR only




Rubber Flanges
Order No. Mikuni NoDescription
007-460 HS42/018-42K HSR 42 to Harley Davidson® 2 bolt flange
007-461 HS42/018-45K HSR 42 to Harley Davidson® 2 bolt flange
007-467 HS42/062-48K HSR 42 to Harley Davidson® 2 bolt flange




Jetting Parts
High speed (main), low speed (pilot) jets, jet needles and
accelerator pump nozzle for the HSR42/45/48 carbcuretors
VM28-486-xxx Pilot Jets,
size range 15 to 50 (2.5 increments)
N100.604-xxx Main Jets,
size range 140 to 200 (2.5 Increments)
J8-8DDY01-xxx HSR42 Jet Needle, size -95, -96,
-97, and -98, standard in HSR42 is -97
J8-8CFY02-xxx HSR45/48 Jet Needle, size -95, -96,
-97 and -98, Standard HSR45/48 is -97
TM42/11-xxx Accelerator Pump Nozzle, size-50,
-60. and -70, standard is -70.
Replacement K&N Air Filters and
Chrome Covers
Order No. Mikuni NoDescription
007-463 HS42/012 K&N Air Filter for HSR carb kit 2-1/2" Thick
007-464 HS42/021-250 Cover used with K&N Filter without cutouts
007-466 HS42/012-300 3" thick Hi Flow air filter
007-462 HS42/006 Cover used with stock airbox with cutouts





Throttle Cables for Early HSR 42/ 45 (old style)
Order No. Ref No.Length Description
Fitment: 1970 to 1995 screw in type
007-451 HS42/028-A Standard 38" Open
007-452 (HS42/029-A) Standard 38"Close
007-550 (KHS/039) Dresser (47”) Open
007-551 (KHS/040) Dresser (47”) Close
Note: Open = Throttle Close = Idle
Fitment: 1996 to Present Push in Type
007-554 (KHS/043) Standard (38”) Open
007-555 (KHS/044) Standard (38”) Close
007-552 (KHS/041) Dresser (47”) Open
007-553 (KHS/042)Dresser (47”) Close
021-934B (01-670) Old Style HSR 42/45 Push
021-934A (01-669) Old Style HSR 42/45 Pull
Fitment: Buell
021-935 (01-716) Up to ‘98 New Carb Push/Pull
021-936 (01-715) ‘99 Old Carb Push/Pull
021-937 (01-714) ‘99 New Carb Push/Pull





Needle Valve Assemblies:
Order No. Mikuni No.Description
007-708 786-27002-1A-4.5 HSR48- STD
007-476 786-27001-4.2 HSR42/ 45- STD
007-477 786-27001-3.5 Offroad
007-478 786-27001-2.3 Fuel Pump
007-479 786-27001-1.5 Fuel Pump


Back to Mikuni Page
Old Style HSR 42, and 45 Diagram & Parts List
New Style HSR 42, 45, and 48 Diagram
New Style HSR 42, 45, and 48 Parts List