Mikuni RS40 Carb Kit- Suzuki GSXR WC Water/Liquid Cooled Models

(1 customer review)

$1,620.00 AUD$1,720.00 AUD


This Mikuni RS40 carburetor Kit is for direct fitment to most Larger GSXR Water/Liquid Cooled engines. They will breathe a whole new lease of life into your machine with an up to 25% increase in power, whilst making it perform and operate as it should with no hesitations or flat spots.

You will very quickly realize that the expense of a rebuild of your old worn OEM carbs can far exceed the cost of these new units and unfortunately as with many rebuilds now days you only have the option in many cases of gambling with very poor quality aftermarket parts. Considering this and if intending to ride and enjoy your motorcycle it makes good sense to retire your OEM carbs into the cupboard and step up to a set of RS’s.

Before rushing in and ordering please firstly check your carb spacing and carbie sizes for compatibility. These are not suited for downdraft engines.

This Mikuni kit comes with the carb  throttle port  center to center spacing’s listed below for direct fitment to Suzuki GSXR WC Liquid Cooled Engines.

A= 85mm (spacing center to center between carb 1 & 2)
B= 90mm (carb 2 & 3)
C= 85mm (carb 3 & 4)

The carb total front to back length of 100 thru 103mm replaces OEM carbs measuring 96 thru 100mm and comes with either a 55mm inlet outside diameter for use with POD filters or velocity stacks or with fitted sleeves increasing the inlet diameter to 58mm for standard air-box compatibility. The carb outlet diameter at the motor end is 44, where your engine will be 46mm making it impossible to makr a 1mm thick sleeve with indents ao all thats required is for you to tension your rubbers a bit tighter down onto the carbs. Select from the options in the purchase drop list.

On some engines the side plate is in the way of the new choke knob and needs some material removed for clearance when engaging the enrichener, as shown in the picture gallery.

All sleeves are CNC machined, silver anodized and permanently set in place using 620 Loctite. These RS carbs have been re-spaced using new stainless steel throttle and choke shafts along with plated metal upper and lower support brackets for maximum strength and rigidity.


Pilot Jet: VM28/486-17.5, Needle: 9DCHY10-99, Needle Jet: Y-6 (568 Series), Main Jet: N100.604-140

Your stock throttle cables will match to these carbs, where we also have available in the RS accessories page either our road bike throttle and cable assembly (KRS-001) or a Quick action 1/4 turn throttle and cable kit (PPQA40K)
You can also buy separately either POD filters or Velocity stacks which have no form of filter in them (15, 30,50 and 75mm long) for racing.

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 your Carb diameters

55mm Inlet For PODs, 58mm In For Air Box

1 review for Mikuni RS40 Carb Kit- Suzuki GSXR WC Water/Liquid Cooled Models

  1. Daniel Murray (verified owner)

    Hi Guys I fitted a set of these RS 40s to my 1995 GSXR 1100W water cooled GIXER What a difference they have made especially from idle thru to 1/2 throttle very responsive no bogging its turned the old girl into a beast Thanks Tom and the team at Mikunioz

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