Free Ground Shipping *| See Details

Buy Now Pay Later Rates as low as 0% *| See Details

Free Ground Shipping *| See Details

Buy Now Pay Later Rates as low as 0% *| See Details


Search Products




Don't see your motorcycle?

The item selected will only fit the motorcycles listed. Please select your bike here to see all the parts that fit your motorcycle.

Saved Motorcycles
Mikuni HSR42
Read ( 26 ) Reviews

Mikuni HSR42 "Easy" Carburetor Kit

J&P Cycles Part Number: 400-584

Manufacturer Part Number: 42-18


Gold Club Price: $359.09

Checking availability...

– Order in the next to ship today

Item Added to Wishlist. View Wishlist

  • Free Ground Shipping

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

Product Specs

Product Specs for Mikuni HSR42 "Easy" Carburetor Kit

Bore Size:
Manufacturer Part Number:
Sold in Units:
Warehouse Part Number:
Fitment Questions?

With over 750 years of experience combined, our tech staff has the answers!

Compatible Models

Harley-Davidson® Models

  • Dyna Low Rider Convertible FXDS CONV : 1999–2000
  • Dyna Low Rider FXDL : 1999–2005
  • Dyna Super Glide Custom FXDC : 2005
  • Dyna Super Glide FXD : 1999–2005
  • Dyna Super Glide Sport FXDX : 2000–2005
  • Dyna Super Glide T Sport FXDXT : 2001–2003
  • Dyna Wide Glide CVO FXDWG3 : 2002
  • Dyna Wide Glide FXDWG : 1999–2005
  • Softail Deluxe FLSTN : 2006
  • Softail Deuce CVO FXSTDSE2 : 2004
  • Softail Deuce FXSTD : 2000–2006
  • Softail Fat Boy CVO FLSTFSE : 2005
  • Softail Fat Boy FLSTF : 2000–2006
  • Softail Heritage Classic FLSTC : 2000–2006
  • Softail Heritage FLST : 2005–2006
  • Softail Heritage Springer Classic FLSTSC : 2005
  • Softail Heritage Springer FLSTS : 2000–2003
  • Softail Night Train FXSTB : 2000–2006
  • Softail Springer Classic FLSTSC : 2006
  • Softail Springer FXSTS : 2000–2006
  • Softail Standard FXST : 2000–2006
  • Touring Electra Glide Classic FLHTC : 1999–2005
  • 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
Customer Reviews

Customer Reviews for Mikuni HSR42 "Easy" Carburetor Kit

Overall Rating

5 out of 5 stars (based on 26 reviews)

5 stars (22)

4 stars (4)

3 stars (0)

2 stars (0)

1 star (0)

0 stars (0)

chrisrcromwell on 1/13/2020

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.

GEORGE on 1/6/2020

Solved my recent chugging problem with my old CV carb. Seems to have more zip too.

ROBERT on 10/10/2019

easy to replace . quick , bike runs great

clasenptg on 9/30/2019

Arrived quickly. I installed it on my 2005 Electra Glide Classic with 54000 miles on it. It was fairly simple to install. Instructions were completes and easy to understand. Fit perfect. Bike fired right up and with very minimal adjustment the bike was running like brand new.

BADGUYCHOPPER on 7/19/2019

Incredible difference, highly recommended!

JIMMY on 7/12/2019

100 percent satisfied... Works Great.

Mountainman626775 on 6/23/2019

Everything I needed for my 03 wide glide. Didnt notice much difference in overall power. But did improve response and much smoother on bottom end. Factory setting was close only had to turn in air/fuel 1 turn and ready to run! Highly recommend for a quick change and still using stock air filter setup.

MICHAEL on 6/23/2019

Works great

MARK on 4/29/2019

love this carb easy to set up and makes a lot more power

KLAUS on 4/22/2019

The carb came quickly, installed easily, and my R K never ran so good.

Instructions & Manuals
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.

Pickup in our Retail Stores
Out of Stock in Retail Center Anamosa, IA
Out of Stock in Retail Center Daytona, FL
Live Chat

Hey There.
How can we help you today?

Live Chat Icon
Live Chat Icon

Holiday Shipping Schedule

Guaranteed Delivery By The 24th
Order By 1PM EST
Shipping Option