1. TM45-2, Mikuni HSR 45mm Carburetor, Natural or Polished/Chrome

(1 customer review)

$445.50 AUD$594.00 AUD

or 4 fortnightly payments from $111.38 AUD with Afterpay More info



The Mikuni TM45-2, HSR45 is supplied with the following factory jetting installed:

Pilot jet 25 (VM28/486),  Needle 8CFY2-97,  Needle Jet Y-6 (723 Series),  Main Jet 175 (N100.604),  Air Jet 0.0 Blank,  Slide Cutaway 3.0 (TM42/08),  Needle valve 4.2 (786-27001)

Dimension A= 49mm, B= 90mm, C= 176mm, D= 65mm, Total Width 100mm

Going fast has never been so easy. The number one performance carburettor flows 237 CFM and delivers a huge improvement in performance and power over stock carbs on performance engines.

This carburetor can be adapted to a number of different applications where space allows.

On Harleys they use the original 1989 and later CV carb throttle cables. Mikuni’s Big Easy Kits fit with the addition of a bigger manifold and a high flow air filter. The air-cleaner Adaptor HS42/001 and O-ring HS42/003 will need to be purchased separately to fit OEM CV and S&S air-cleaners to these carbs.

In other applications where some modifications are required for fitting, any effort and time spent is soon forgotten once you experience the better throttle response, improved acceleration, increased power and torque. Mikuni’s smoothbore, flatslide with roller bearings, and accelerator pump technology delivers peak performance from idle to Wide Open Throttle.

These carburetors are available in the standard natural finish or for show bikes and some Harley Davidson owners there’s the chrome and polished version.

NOTE:  Please be advised only polished/chrome 45mm carburetors come with the choke cable, The natural finish DOES NOT have a choke cable included.

As this carburetor has a larger spigot diameter than the stock Harley item and will not fit into your manifold, you must use a H-D Screamin’ Eagle Manifold Kit or better still either a Mikuni HS42/061-45 Evo or Hs42/061-45TC Twin Cam Manifold which are for use on all engines with stock length cylinders. When fitted along with the also purchased here separately HS42/062-45 mounting flange it will position the HSR so as not to protrude out any further than stock with the benefit of better carburetor heat isolation, more secure mounting and a 2 to 3 HP gain over the standard item.

It is always recommended to replace your manifold to head o-ring gaskets when fitting a new manifold. Sorry not available through Mikunioz

(The picture with the cables for applications other than ’89 and later Harley Davidson shows the required length of inner cable protrusion and securing fitting at the carb end on basically a minimum length adjustment. The back board is divided into 1 and 10mm increments)

All international buyers are responsible for the payment of their domestic customs duties and taxes charged on imported goods. The duty free threshold and duty/taxes payable rates differ from one country to another and we strongly advise you check your liability before ordering if unsure. Please check your tracking on all international shipments within 7 days to follow their progress and determine if it is being held by your local customs dept. or on their behalf by the Postal Service, who you will need to make contact with using the provided tracking number.

Please Note: Other than exact replacement OEM carburetors, all Mikuni Aftermarket Carburetors and Tuning Components are sold “As Is” for Off Road / Racing Use Only and are not intended or approved for use on vehicles operated on Public Roads or in locations where applicable engine tampering and anti-pollution laws apply.


Additional information

Purchase Options

Natural Finish, Polished & Chrome

1 review for 1. TM45-2, Mikuni HSR 45mm Carburetor, Natural or Polished/Chrome

  1. Grant Sanders (verified owner)

    My 111ci S&S had an S&S Super E carby and it just wasn’t performing as it should. I spoke to Mikunioz and was suggested the TM45mm. We installed the carby and ran it on the Dyno. My bike has now found the extra Grunt it was missing. More than happy with the results now having the right carby for the motor.

    Thanks for all your help.

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