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Mikuni HSR42
34 Reviews

Mikuni HSR42 "Easy" Carburetor Kit


Gold Club Price: $359.09

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J&P Part #:  400-584
Mfr Part #:  42-18

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Mikuni HSR42
Mikuni HSR42 "Easy" Carburetor Kit

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Mikuni HSR42

Mikuni HSR42 "Easy" Carburetor Kit

Gold Club Price: $359.09
Order in the next to ship today

Product Details


Description for Mikuni HSR42 "Easy" Carburetor Kit

The Mikuni HSR42 Easy Carburetor Kit replaces stock CV carb for better performance, more power and dependability. It features a two-piece throttle slide that rolls on stainless bearings for smoother operation, excellent throttle response, and easier starting. The 42mm carburetor smoothbore Venturi creates great airflow, while the enlarged needle and seat provide extended full-throttle operation. The adjustable accelerator pump gives you the best motorcycle performance with instant throttle response at any RPM, and the light throttle return spring makes for easy pull operation. The Easy Carbutaotr Kit works with stock manifold and throttle cables, choke cable, and air cleaner. This kit includes the carb adaptor. High-flow air filter such as 400-639 recommended for maximum performance.

• Replaces stock CV carb

• Stainless bearings

• Pre-jetted 42mm carburetor smoothbore

• Enlarged needle and seat

• Instant throttle response at any RPM

• Easy pull operation

• Works with stock manifold and throttle cases

• Includes carb adaptor

• Use with high-flow air filter

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Mikuni HSR42

Product Specs for Mikuni HSR42 "Easy" Carburetor Kit

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Fitment Questions?

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  • Harley-Davidson®

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    • Softail Deuce FXSTD : 2000–2006
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    • Softail Springer Classic FLSTSC : 2006
    • Softail Springer FXSTS : 2000–2006
    • Softail Standard FXST : 2000–2006
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    • Touring Electra Glide Standard FLHT : 1999–2006
    • Touring Electra Glide Ultra Classic FLHTCU : 2005
    • Touring Road Glide FLTR : 1999–2001
    • Touring Road King Custom FLHRS : 2004–2007
    • Touring Road King FLHR : 1999–2005
    • Touring Street Glide FLHX : 2006
Product Notes

Important Product Notes

Will not permit the use of cruise control.

Shipping Note

Due to state regulations we cannot ship this item to the state of California.

Ratings & Reviews

Help Customers Understand This Product

34 Reviews
Rating Breakdown
5 stars
4 stars
3 stars
2 stars
1 star
April 29, 2021
Carb it's self is great. However, J&P needs to note in their "Direct fit" look up, though this will "fit" a Ultra, there is no option for connecting cruise control. That is a major problem. Primo is no longer producing an adapter either. Mikuni would be wise to address this too.
April 22, 2021
Excellent carb ! What a difference between my old CV carb ! was having way to many problems and installed the Mikuni HSR 42 very pleased and happy !
April 16, 2021
Bolt on ready no adjustments had to be made
October 28, 2020
By far the easiest carburetor to tune and get running perfect right out of the box. Huge upgrade from the Harley CV carb. Great throttle response! Definitely would buy again.
September 24, 2020
Just as it says EASY it was a breeze to put on and the bike runs great
July 20, 2020
Great carb
June 25, 2020
Awesome carb. Runs perfect right out of the box. My bike never ran this good. The stock fuel line (1/4”) did not fit over the mikuni inlet. Had to buy new fuel line (5/16”) but it was good to replace the old line anyway.
April 24, 2020
Super easy, and was very close right out of the box! 04 FLSTC
January 13, 2020
This is the carb I put on my 2006 Harley Sportster 1200 Low. I really like it! The carb looked great and came with 2 helpful manuals plus 2 different sizes of main jets out of the box. The bad thing was there was a few missing parts I needed and I had to get them from the dealership. Anyway, with the missing parts bought, I was able to put the carb on the bike in one afternoon. I was able to use the stock chrome throttle cables and made sure all of the cables didn't bind up. The instructions were confusing about the vacuum hose fittings but when I figured that out, the bike fired right up on the first try. I made some minor tweaks with the mixture screw and I put in the larger main jet to be sure the carb wouldn't run lean. I took it for a test ride & it sure pulled like a freight train! Later on I pulled off the stock air cleaner and mounted on an Arlen Ness Big Sucker. It mounts easy on the Mikuni carb using the same adapter ring. Don't settle for the stock CV Carburetor that can overheat & ruin the engine like mine.
January 6, 2020
Solved my recent chugging problem with my old CV carb. Seems to have more zip too.

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Mikuni HSR42

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