Yamaha XT350 and XT250 Mikuni TM34 Flatslide Single Carb Conversion Kit

Description

This kit is for Yamaha XT250 and XT350 models as defined by the air-box:   The OEM air-box on the XT has a one piece poly front section with a recess that cups around the shock and a single round hole each side, as per the first pictures  in the library.  Please physically identify the air box as motors and other components can often be mixed and matched on older motorcycles.  Note that the air-box on the other separately listed TT kit is very different and has a flat forward facing section with a large removable flat, oval metal plate (6 screws) which accommodates both of the OEM twin carb air box connection boots.

This Mikuni TM34 Non Pump type TM Flatslide single carburetor conversion kit is for replacement of the OEM Yamaha twin carbs fitted to XT350’s and 250 models with matching air-boxes. The TM34 though a budget option carb still delivers great performance improvements over OEM and Mikuni VM carbs, where unfortunately available space doesn’t allow for using a pumper carb. This is an easy solution to non repairable, worn out stock units. These have for decades been the economical replacement performance carb of choice for Honda XR riders who have worn out their OEM carbs or are just over some of their inherent problems. All this means getting the full enjoyment out of your motorcycle has never been so easy, say goodbye to hard starting, hesitations, flat spots and hold on, she’ll pull a lot harder and deliver an overall speed improvement. You will have no problem finding racers and enthusiasts alike singing this kits praises on the owners forums.

XT350 and XT250 FRAME FITMENT Modifications: This frame variant requires removal of some material above the carb for clearance where to best determine and only remove the bare minimum of material, mount the carb to the manifold sliding it up from underneath to check whilst slowly grinding away till satisfied you have a couple of mm clearance. A very small amount of material from the plate on the RH frame upright also needs removing for better clearance for the silicon elbow to connect back to the air box.

Yamaha XT kit components: This kit comes with a Mikuni TM34-2 carb, an aluminium two into one manifold with gaskets, washers and new stainless steel socket head screws, a specially made heavy duty rubber sleeve and clamps, this one not having an internal separator block allowing the carb to sit 4mm closer to the motor. A fitted 46mm diameter air-box adapter for connection with the  angled silicon hose  back to the black anodised aluminium air-box RH side adapter, a matching blanking off disc is supplied for the LH air box port. Two hose clamps are supplied. A 1/4 turn quick action throttle and a nylon lined cable with a 45 degree lower fitting which screws directly into the carburetor top for clearance . There are what should be correctly sized  jets fitted as well as spares for fine tuning. The carb comes with a rarely ever required knob choke where if in colder climates you find you do need to use the choke and access to the knob is an issue if using a larger than stock tank, we sell separately either a cable choke adapter kit ( MK-412 ) or a complete kit with universal bracket and 310mm long cable ( MK-412-310C ).

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, besides the set up that should be spot on, we have included spares to allow you to tune to most variables worldwide.

You will instantly experience better throttle response, improved acceleration and performance.

IF NOT WANTING TO PURCHASE THE KIT IN ITS ADVERTISED FORM PLEASE FOLLOW THE DIRECTIONS BELOW.

If wishing to modify or use your existing cables or mounting flange to suit the Mikuni TM34  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 (non Pump) and then select TM34 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 (TM38-86) 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.