Genuine Mikuni TM42-6 (HSR 42) 

This Kit comes with an extra Knob Choke for optional fitting. If you do not require the extra knob choke and wish to use the OEM Suzuki cable choke only, the listing can be found separately.

The Mikuni TM42-6 HSR flows 17CFM more than the TM40-6 and incorporates many upgraded features such as a roller-bearing slide. All this means going even faster has never been so easy, say goodbye to hard starting, hesitations and flat spots.  These Mikuni carburetors are correctly sized and easily fitted to your Suzuki DR650 stock air box when using the silver anodized air-box adapter. This adapter is fitted prior to delivery when purchasing complete kits. For this Mikuni carburetor to operate correctly the motorcycles air box must be opened up to allow more air flow in. Using a hole saw, a 45mm diameter hole will be a sufficient starting point where alternating between WOT runs with and without the filter access door removed will confirm if you have removed enough material. The kit also comes with throttle cables and a 1/4 turn quick action throttle. The carb comes fully re-jetted for your application with spare main jets for fine tuning. 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 fitted what we have found to be a range of jets to allow you to tune to most variables. Though the TM42-6 will accept OEM choke cables, you have the option to select the other Suzuki DR650 kit here on eBay with an additional knob choke assembly. International buyers please advise us of your fuel octane rating so we can make jetting allowances if required.

Fine tuning is generally related to exhaust system with the DR650 where the supplied setup is in most cases perfect but if you don’t get that instant “WOW I’ve got myself a crazy wheel standing machine” feeling,  it will only usually relate to main jet size and or often pump nozzle. If at all confused or in need of guidance we offer our customers, business hours phone support for any carb we sell. The TM42 for big Jap singles are now our most popular selling kits worldwide and our knowledge base for tuning to different engine configurations of all brands is extensive.

You will instantly experience way better throttle response, improved smooth acceleration, increased horsepower and torque.  Plus the bonus of better fuel economy. Dyno tests show improvements of up to and over 25% when fitted to OEM carburetored engines. To fully appreciate the potential this carburetor has you must fully read and follow the provided fitment and tuning sheets.

To clarify some commonly asked questions about this carb in regards to a comparision with the 40mm: 

In the late 80’s Mikuni American released the HS40 (TM40-6) as an amazing new carburetor for the Harley Davidson market, literally knocking all its competitors out of the park. We were at the San Jose Custom Chrome Show when it was released and become part of that buzz as Australian Mikuni distributor. This slide type fuel metering device basically made the competitors butterfly type carbs seem like lawn sprinklers.
With the huge increase in Harley Davidson sales this became a very lucrative market. Recognizing the potential of this market and being aware of the efforts of competitors to try and grab back their share of it made Mikuni realize the necessity of replacing the 40 with a carburetor to be the be all and end all of all carburettors. The target was to deliver unrivaled peak performance combined with smoother throttle operation and lighter throttle pull by replacing the metal on metal slide action with a slide running on roller bearings. Also a larger fuel bowl capacity was provided but most of all, superior venturi design and fuel atomization resulting in more precise mixture ratios to not only increased horsepower and torque but also to enable the fitment of a larger carb to smaller capacity engines without losing valuable bottom end power, where in fact instead gaining more. In 1994 the HSR42 was born and just like you will if you fit one to your bike, all we could say was WOW. Instant throttle response delivering 25% more horsepower and torque over the stock CV carb before even putting on a real high flow air-cleaner. As the badge says 20 years later” Still the best performance carburetor on the planet”.
Unfortunately, the TM42 only had limited sales in the Japanese single market due to it only appealing to the custom fitter as there had never been a cable set or air-box adapter available off the shelf. With the slowing of the Harley market due to fuel injection on new bikes, here in Australia, Mikunioz realized the opportunity to offer Mikuni’s best Carburetor to the big Jap single market and in late 2015 we released a range of ready to roar direct fit up kits with correct jetting and a few trick mods to make them work better than anything before on big Jap Thumpers.

The fuel consumption is way less but when comparing with the stock carbs, it all depends on how having a lot more power and torque effects your riding habits. If you can manage to back off and just have your bike perform at its present level you’ll be surprised by the fuel economy, but of course when the same amount of throttle twist becomes front wheel lifting, breaking traction action, well it’s hard to not want to go and play. If you have more horses in the paddock and you want them all to perform, you have to feed them more hay! 

You will enjoy this new carb but do be sure to hold on tight on your first test ride as she may try to spit you off if you nail it to hard.

Additional Information:

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.

 Australian Shipping Information:

All shipping within Australia is via Australia Post only.

Please note that we are located at Townsville North QLD and that all standard shipping “Free Freight” travels by train from us all the way down the East Coast as far as Victoria. EBay freight times are estimates only and do not take in to account our location. We have express options available for all our products also. The freight times around Australia are as follows-

Standard or eBay “Free Freight”

Townsville to Brisbane 3 days, Townsville to North/Just South and West is usually 1-2 days,

NSW ACT & VIC 4-6 days, TAS & SA 4-8 days, WA & NT 8-12 days.

Express Freight

Anywhere in QLD except some rural areas is next day delivery. NSW ACT & VIC 2 days, TAS & SA 2-3 days, WA & NT 3-4 days.

Please note that weather events such as flooding, cyclones and other natural disasters etc will delay any ground freight. This is entirely out of our control if this occurs.

 International Shipping Information:

All international shipping is done through Australia Post Express Courier EMS service.

The international service we use is generally 4-5 Business days for delivery but can be shorter or longer.

 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 contact using the provided tracking number.

 As per the eBay terms and conditions, WE ARE NOT RESPONSIBLE AS A SELLER FOR YOUR COUNTRIES IMPORT DUTIES OR TAXES, WE HAVE NOT NOR WILL WE EVER PAY YOUR IMPORT DUTIES OR TAXES, OR REFUND ANYONE FOR THEM AND THEY ARE DEFINITELY NOT INCLUDED IN THE ITEM PRICE! PLEASE CHECK YOUR COSTS BEFORE MAKING THE PURCHASE! THIS IS JUST PLAIN OLD COMMON SENSE.

 Please also note that international parcels HAVE to be signed for and all parcels whether domestic or international are fully insured.

 Returns and Refunds:

Our business Warranty or Return period is 7 days only. We do accept eBay’s 30 day return policy but please read all the information below carefully before making your purchase.

THE FOLLOWING INFORMATION IS FINAL.

Here at Mikuni OZ we do offer refunds and returns but there are strict procedures for this.

All carburettor kits that need to be returned for refund or exchange MUST be returned in the exact same way they left the warehouse. All Carburetors & Carby kits that have been opened WILL BE thoroughly stripped and inspected, in the case of any fuel being added, greases or lubricants, tampering or any form of damage to the carburettor there will be ABSOLUTELY NO refund and the kit will be returned to you at your expense! THIS IS FINAL AND NO OTHER EXCEPTIONS!

Absolutely all returns for any reason will be charged a 10% restocking fee whether it has been opened or not before it was returned and the freight for us to send you the kit originally will be deducted also before your refund is issued.