TM40-6 Mikuni Flatslide Pumper Carb Basic Kit Yamaha SR TT XT 500

(1 customer review)

$610.00 AUD

SKU: TM40-6YAM500BK Categories: ,


Going fast has never been so easy, say goodbye to hard starting, hesitations and flatspots.  This Mikuni TM40-6 carburetor is suited for high performance Yamaha 500cc SR, TT and XT models. This Mikuni TM40-6 Pumper carburetor fits as a direct replacement to the Yamaha SR, Yamaha TT and Yamaha XT inlet snorkel and with the fitment of the provided outlet mounting flange, which moves the carb slightly forward, enables it to properly clear the frame. Most Yamaha OEM Push/Pull throttle cables will fit this carb but Mikunioz does also offer an optional set of new throttle cables and a 1/4 turn quick action throttle. There is a hose tail on the carb for connection to vacuum operated fuel taps.

The jets and pump nozzel required to make this carb operate on Yamaha 500cc singles have been fitted and there are spares for fine tuning the main jet circuit doing WOT tests. Climate, altitude and fuel density from different octane fuels all have varying effects on final fine tuning as does cam, exhaust and cylinder head porting etc. For this reason, we have included what we have found to be a range of jets to allow you to tune to most variables using Australian fuels.

At Mikunioz, for the last 30 years, we have been constantly checking and where necessary upgrading our jetting specs as fuel quality changes. Regular fuel in the USA is 85 octane or 91 in their premium brands which have numerous additives and blends added (basically smells and drys like wood varnish) which results in a totally different jetting spec and product performance. This carb as supplied from the factory will never work on this bike and requires a total re-jet as supplied loose with your carb.

You will instantly experience better throttle response, improved acceleration, increased horsepower and torque.  In a number of instances Dyno tests have shown improvements of up to and over 25%  when fitted to OEM carburetored engines.



The carburetor, tuner jet kit and or what ever other components you want individually by following the directions below.

On the main menu to the left of the page, hover over the carb listing for TM Carbs with Accel Pump and then select TM40-6 from the drop down list. When clicking on any individual size Mikuni carb from the drop down list it will put you into a page showing not only the Mikuni carb itself but also any items relevant to that carb, being Mikuni jets, Mikuni flanges, Mikuni carb tuner kits, Mikuni cables , Mikuni throttles, Mikuni air-cleaners and a range of Mikuni carb to OEM air box adaptors etc to also suit. This also makes alternate jet selection easy for you if you have your own spec as only the type jets for that particular carb are shown.
Click on the carb itself if wanting to view the full details and or to make your purchase. Then back arrow back in the carbs main page and go into the tuner kits, which show in the sales drop down list the jetting kits we have for confirmed suitable engines for that particular carb. Again thoroughly read the tuner kit description.
If you’re comfortable with making a purchase of the carb, tuner kit any or other associated components, order it on line or otherwise please call us to further discuss your needs on 0747712677.

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

Choose Engine Size

Yamaha 400cc, Yamaha 500cc

1 review for TM40-6 Mikuni Flatslide Pumper Carb Basic Kit Yamaha SR TT XT 500

  1. admin

    Sam Panettieri – October 22, 2018

    I just put one of these Mikunioz TM40-6 pumper kits on my SR500 last week only with a KRS-001 throttle. WOW what a difference to the VM36 I had fitted about 3 years ago. She pulls like a freight train now & I am really surprised to see my fuel economy increased from 16Km/lt with the VM to 22Km/lt with the TM and that’s while riding it like I stole it. Don’t be a tight arse and buy the VM as this TM makes it feel like a totally different bike, and you will recoup the added cost in fuel savings.

Add a review

Your email address will not be published. Required fields are marked *