42-18 Mikuni HSR Easy Kit, Harley ’90up Evo/TwinCam Bigtwins

(1 customer review)

$590.00 AUD

(Please note that the new adapter now bolts to S&S air-cleaners as well as stock CV)

In stock

SKU: 42-18 Categories: , ,


42-18 Mikuni HSR Easy Kit-1990 to present Harley Davidson Evo & Twin Cam Models. For the maximum available increase in all round performance and power available, this kit will instantly impress.

Mikuni’s HSR Easy Kit dramatically improves the performance of Harley-Davidson’s new Twin Cam engine and delivers unmatched throttle response and acceleration! Used with a Screamin’ Eagle Air Filter and an aftermarket exhaust system like the optional Screamin’ Eagle Mufflers, the HSR42 Easy Kit adds 25% more horsepower to the output of Harley’s Twin Cam engines. In the 88 CUI motor, maximum horsepower is increased from 57.8 to 72.2 hp, and Max torque from 71.4 to 80.7 ft/lbs.
These kits are designed to work with your original Harley-Davidson intake manifold, choke cable, air cleaner and throttle cables. You can run S&S Shorty or other high performance air filters designed for the CV type carb. by using the special adapter included in the kit.

For the fitment of some versions of the S&S Shorty air-cleaner to a Mikuni HSR carburetor, the breather on the backing plate may need to have some material removed with some others requiring material to be ground off the outer edge of the S&S backing plate to allow for clearance giving total unimpeded movement of the return arm on the carburetor. See the picture showing this required modification.

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.


1 review for 42-18 Mikuni HSR Easy Kit, Harley ’90up Evo/TwinCam Bigtwins

  1. admin (verified owner)

    Thanks for the carb, its superb.
    I was sold a fake one by a reputable UK dealer that did not work properly.
    I have just put a TC88 1450 in my old FXR.
    Thanks again,

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