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Mikuni HSR45 Carburetor Total Kit

(8 reviews)

Item: 345342-356453

$507.61

Select Your Vehicle - Fitment Guaranteed

Mikuni HSR45 Carburetor Total Kit


  • Gives you everything needed for a complete installation
  • Kit includes performance intake manifold, rubber flange, HSR carb, high flow K&N filter, chrome cover, head breather kit, bolts and hardware
  • Installation instructions and hardware are included
  • Pre-jetted and ready to run
  • Includes N100.604-180 main jet for tuning
  • Use stock Harley-Davidson throttle cables
  • Made in Japan
Specification Details
Bore 45 mm
Choke Type Cable
Country of Origin Japan
Engine Type Twin Cam
Height 176 mm
Intake Bell O.D. 65 mm
Main Jet 175 (N100.604)
Manifold Type Spigot
Manifold to Manifold 90mm
Needle 8CFY2-97
Needle Jet Y-6 (723)
Needle Valve 4.2 (786-27001)
Pilot Jet 25 (VM28/486)
Spigot Mounting O.D. 49mm
Throttle Valve 3.0 (TM42/08)
Width 100 mm

Vehicle Fitment


Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.

Harley Davidson
  • FLHR Road King 1999-2006
  • FLHRS Road King Custom 2004-2006
  • FLHT Electra Glide Standard 1999-2006
  • FLHTC Electra Glide Classic 1999-2005
  • FLHTCU Ultra Classic Electra Glide 1999-2006
  • FLHX Street Glide 2006
  • FLST Heritage Softail 2006
  • FLSTC Heritage Softail Classic 2000-2006
  • FLSTF Softail Fat Boy 2000-2006
  • FLSTN Softail Deluxe 2005-2006
  • FLSTS Heritage Springer Softail 2000-2003
  • FLSTSC Softail Springer Classic 2005-2006
  • FLTR Road Glide 1999-2004
  • FXD Dyna Super Glide 1999-2005
  • FXDC Dyna Super Glide Custom 2005
  • FXDI35 35th Anniversary Dyna Super Glide 2006
  • FXDL Dyna Low Rider 1999-2005
  • FXDS-CONV Dyna Convertible 1999-2000
  • FXDWG Dyna Wide Glide 1999-2005
  • FXDX Dyna Super Glide Sport 1999-2005
  • FXDXT Dyna Super Glide T-Sport 2001-2003
  • FXST Softail Standard 2000-2006
  • FXSTB Softail Night Train 2000-2006
  • FXSTD Softail Deuce 2000-2006
  • FXSTS Springer Softail 2000-2006

Customer Reviews


Best carb

By   on  Verified Purchaser

Best carb on the market. Worked right out of the box. Bike runs perfect! Great place to buy parts!


Mikuni hsr42 total kit

By   on  Verified Purchaser

Swapped my Magnetti Marelli EFI out with this kit. Had everything I needed to get the job done other than an ignition. Worked flawlessly.


Great total kit, minus the disclaimer you at least need intake manifold flange seals if going with Mikuni manifold

By   on  Verified Purchaser

Awesome, everything I expected.


Fast

By   on  Verified Purchaser

Can't go wrong with this brand carb.


Love the carburetor

By   on  Verified Purchaser

She's getting twice the air in fuel she was with the stock carburetor but they are a pain to dial in. It just takes a quarter-turn and you're out of whack once you get that right it's still popping and farting at quarter throttle to wide open then it just takes a needle jet adjustment. Overall everything I bought from y'all in the last 3 months turn my 05 heritage into a beast. My brother has it built 128 cubic inch motor on basically a frame and nothing else and I'm right there with him in most cases ahead of me with my little hundred in.


Almost...

By   on  Verified Purchaser

Thought this kit had everything I would need, but the 2 gaskets, the round ones... I had to purchase separately... other than that seems like a good kit so far!


Great Kit

By   on  Verified Purchaser

Excellent kit! Everything I needed was in the box and my bike is running excellent with this carb.


Happy Chopper

By   on  Verified Purchaser

Im very pleased with every part.


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Questions & Answers


What would be the best carburator for my 1987 heritage Softail 80cc

That would depend on what you're after. If you want something that'll bolt straight on without having to add any additional parts to your order, then the Mikuni HSR Smoothbore Easy Carburetor Kit might be the best way to go since it doesn't require the throttle cables and intake manifold flanges from a 1990 Evolution Big Twin and it'll work with the OEM air cleaner, or an OEM-replacement air cleaner as well. With that, you'll get a great carburetor that's easy to install but with improved throttle response and, potentially, better engine power too, with a proper tuning.

By Tom

Does the manifold come tapped to the Vacuum port for the petcock?

The carburetor itself has a vacuum port on it. It can be used for either a VOES switch or petcock vacuum source. If neither are to be used on the application the vacuum port must be plugged before use.

By Staff

Which carb would be best for a 1995 super glide fxd

80" ported and polished heads , Andrews EV27 cam and new bearings , new big radius pipes, Dual fire coil and that's about it so far I am not to impressed with the performance of the S&S super E that is on it and I heard good things about the makuni carbs

The HSR42 would be the best choice for your application. The HSR45 is for larger displacement engines that need more fuel. The tunability of the 42 would be better suited to your current modifications to your 80" EVO.

By Staff

I am considering a conversion from the magnetic morelli fuel injection to a mikuni carburetor on my 99 Road King 88ci twin cam. I have plans for a big bore kit and performance cams. Im told a 45mm or a 48mm will fit my application, which do you suggest?

The HSR45 would be recommend for a bike that has a hotter cam, professional cylinder head port work, a more specialized exhaust system, high compression pistons. The HSR48 is more for highly modified heads, a displacement increase, either by way of fitting larger pistons, a stroker kit or both. This engine is more likely to be a special engine, built from the ground up to be stronger and to process more air than even a highly modified Harley motor. For your application the HSR45 would offer easier tuning for those upgrades.

By Staff

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