BMW TM40 Flatslide Pumper Carb Kit For R100

$1,050.00 AUD$1,105.00 AUD

Kit Includes Two Carbs And Components As Described For Fitment To BMW R100.

SKU: BMWR100TM40-K Categories: ,


IMPORTANT NOTICE- This kit does require a competent level of mechanical skills for correct fitment.

Our TM non pump flatslide and VM roundslide kits have been a popular choice for decades for BMW riders, out performing stock Bings and Dellorto’s, where this Twin TM40 kit is yet another big leap in performance on all the larger BMW engines with startling results.

As we don’t have an in-house built push/pull cable kit available we at present only offer this kit with the components for you to modify your own cables, consisting of new end ferrules, barrels, two longer lengths of inner wire and cable end adjusters. In our top of menu “How to Videos” there’s one on cable soldering and another for carb synchronizing. Tuning info supplied with the kit with after sales support available if ever required.

We supply carbs either as they come with a 44mm (A in Picture) engine side outlet diameter or sleeved up to 49.5mm for the closest match for clamping down your rubbers when replacing the 52mm diameter 40 Bings. There are two universal choke cable brackets for attaching each cable.

What should be spot on jetting is supplied with fine tune details on the supplied paperwork.

These carbs are 100mm (B) front to back and on the filter side are 55mm (D) diameter. If replacing a 100mm long carb or using PODS the carb is good to go with the matching outlet determined, or otherwise we have 16mm extenders still at the 55mm that we can fit to closest match the longer carbs wishing to use the stock air pipe. If replacing the smaller Bing carbs with under 55mm intake diameters you will need to purchase elsewhere some pieces of rubber tube to clamp down onto both the carb spigot at 55mm and the outside of the OEM BMW plastic connector. Always do some air filter disconnected runs when testing the main jets to determine that the air box can supply enough air and if not modify or replace with a pod filter.

The required jets are fitted prior to shipping, with spare mains provided for a WOT tuning check. 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. The TM40-6 comes with a cable choke and bracket where you can purchase separately the optional knob choke assembly.

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.

At Mikunioz, for the last 35 plus years, we have been constantly checking and where necessary upgrading our jetting specs as fuel quality changes. Regular fuel in the USA is 85 thru 87 octane or 91 in the 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. For US and Canadian customers we jet all of our carbs accordingly to suit this. This carb as supplied from the factory will never work on this bike and requires a total re-jet which is done here before shipping.


If wishing to a different air filter rather than have the sleeve fitted you can purchase 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

Select Carb Dimensions

100mm long x 44mm outlet, 116mm long x 44mm outlet, 100mm long x 49mm outlet, 116mm long x 49mm outlet


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