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
Use stock Harley-Davidson throttle cables
Product Note:
Specification
Details
Bore
Varies (make selection above)
Choke Type
Cable
Country of Origin
Japan
Engine Type
Varies (make selection above)
Height
176 mm
Intake Bell O.D.
65 mm
Main Jet
Varies (make selection above)
Manifold Type
Spigot
Manifold to Manifold
90mm
Needle
Varies (make selection above)
Needle Jet
Y-6 (723)
Needle Valve
Varies (make selection above)
Pilot Jet
25 (VM28/486)
Spigot Mounting O.D.
Varies (make selection above)
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.
Best carb on the market. Worked right out of the box. Bike runs perfect! Great place to buy parts!
Mikuni hsr42 total kit
By Bombproof 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 Jeremy N. on
Verified Purchaser
Awesome, everything I expected.
Fast
By Glen B. on
Verified Purchaser
Can't go wrong with this brand carb.
Love the carburetor
By John H. 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 Bryan H. 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 KF on
Verified Purchaser
Excellent kit! Everything I needed was in the box and my bike is running excellent with this carb.
Happy Chopper
By Todd N. on
Verified Purchaser
Im very pleased with every part.
How many stars would you give this product? Write a review.
What would be the best carburator for my 1987 heritage Softail 80cc
By Anon.
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.
I am doing a carb conversion on my 99 Ultra Classic, 88 Twin Cam, with S&S 510G cams. Which Mikuni would you recommend? Or would the S&S E be a better choice ?
For the Twin Cam variant, the 42mm bore carburetor would be correct choice if you're keeping the engine at stock bore. The bigger carb is really best suited for applications with a big bore kit.
Does the manifold come tapped to the Vacuum port for the petcock?
By Anon.
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.
Which carb would be best for a 1995 super glide fxd
By Anon.
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.
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?
By Randy P
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.
Verified Purchaser
