SEU-CVCK-40 Suzuki Samurai Sidewinder CV Carburetor .

Instructions Created by an:Suzuki Samurai Sidewinder CV Carburetor Adapter Kit(SKU# SEU-CVCK-40 )Instructions also apply to: SEU-CVCK-44Revised 09-22-15Installation InstructionsCAUTION: Safety glasses should beworn at all times when working withvehicles and related tools andequipment.Suggested Tools: For additional copies of theseand other instructions go to:www.lowrangeoffroad and click on the“Instructions” tab.Allen Sockets: 6mm, 3/16”Sockets: 10mmRatchetStandard ScrewdriverCombination Wrench (Optional forfuel pressure regulator adjustment)Power Hand DrillDrill Bit: 5/16” Drill BitHack SawTiming LightTachometer

IntroductionSIDEWINDER CV ADAPTER KITOFF ROAD ONLYCongratulations on your purchase of the Sidewinder CV Carburetor Adapter Kit. This uniqueadapter allows you to install the popular Keihin 40mm CV (constant velocity) or theScreaming Eagle 44mm side draft carburetor on your stock or modified off-road vehicle. Theperformance and reliability of this carburetor is a matter of record, and with its float bowl belowthe venturi, the Keihin is very resistant to flooding or rough running when operating on steepinclines or angles. The constant velocity system smoothes sudden throttle changes and alsoallows the Keihin CV to automatically alter A/F ratios during elevation changes.Almost two million Keihins were used on 1988-2006 Harley Davidson motorcycles, onengines ranging in size from 74 cubic inches (1200 cc’s) to 88 cubic inches (1442 cc’s). KeihinCV’s were also used on Kawasaki 90 cubic inch (1500 cc) Vulcans ,Used Keihins are widely available, and units in good condition can be found in the 50 - 100range. The stock 40mm Keihin CV can handle engine displacements up to 1600 cc’s and alsoworks well with modified engines (special camshafts, headers, etc.). For larger displacementmotors, the 40mm Keihin can be bored out to 41mm. Another option you may want to consideris the Harley Davidson Screaming Eagle side draft carburetors in a 44mm size. ThisCarburetor can be purchased through kutterharleyonline.com.Click HERE for moreinformation. If you want to install the 44mm carburetor all that is needed is to swap the 40 mmfront adapter for a 44mm front adapter. Low Range Off-Road has the front adapters availablefor purchase or trade for the 40mm size. However, after very extensive testing on and off road(even in competition crawling events) the 40mm Keihin CV has proven to be the carburetor ofchoice for most applications.The following instructions, photographs, and diagrams demonstrate the assembly of theSidewinder CV Kit.It is recommended that you read the entire installation instructions before beginning!NOTE: Low Range Off-Road recommends usingthe intake vacuum port for the distributer vacuumadvance (See photo 2) first. If you have any issuesafter, then try the vacuum advance on the intakehousing ring (See photo 1).Almost allapplications are using the intake vacuumport. If you are using the intakeIntakevacuum port, start the engine timingHousingprocedure at 14 degrees and if youRing Portare using the intake housing ring, startthe engine timing procedure at 10degrees and then verify engineperformances. (See photo 1).IntakeVacuum PortPhoto 1

DistributerVacuumAdvancePhoto 2IntakeHousingRingFrontHoldingBracketPhoto 3The float bowl can be removed without removing the intake housing ring and the front holdingbracket if the jets need to be changed. This eliminates the need for replacing these gaskets.(See photo 3)Caution: Do not use Loctite type of adhesives on any bolts supplied with the SidewinderCV Kit.

OEM Air Cleaner AssemblyFigure A

Carburetor and Intake AssemblyCarburetorCarburetorMountingStuds (4)SpacerCarburetorMountingSurfaceFigure B

Section 1 “ASSEMBLING THE KIT”Note: If the carburetor you are using has already been modified for use with theSidewinder kit, you can begin here. If not, it is recommended that you start in Section 2,and then come back to Section 1CAUTION: Gasoline is highly flammable. Make sure your engine is cool and that thearea you are working in is well-ventilated and that you are not working near sparks orflames. You have been WARNED! Failure to follow proper basic safety precautions mayresult in severe bodily harm or DEATH to you or your vehicle.Step 1 Disconnect neg battery cable. Remove the stock or after-market air cleaner (seeFigure A), carburetor , and spacer (see Figure B). Be careful not to allow parts or material to fallinto the open manifold. (Caution: The engine should be cool beforeremoving the choke heater hoses. (See Figure D) The coolant will be hot ifthe engine is hot)Step 2 Remove the (4) carburetor mounting studs from the manifoldusing the two (2) jam nut method on each stud, or with a pair of locking pliers.(See Figure B)Step 3 Carefully clean the carburetor mounting surface (Figure B) on themanifold.Note: Porting the intake webbing is optional.Step 4 Lay the new gasket and the Sidewinder adapter on theTwo Jam Nut Methodmounting surface manifold.M8X1.25 x 80metric bolts (4)Step 5Install four the (4) M8-1.25 x 80 metric bolts into the manifold through the billet adapter. Tightenthe bolts using a 6mm allen socket in a progressively tighter criss-cross pattern until 20 ft. lbs isreached. DO NOT OVERTIGHTEN.

FrontHoldingBracketK & N AirCleanerIntakeHousingStep 6Insert the (2) carburetor inlet gaskets,one in front of the carburetor and theother in front of the holding bracket(See Figure C). Install the includedthree (3) ¼-20 x 1.5” bolts. Secure thefront holding bracket and intake housingring to the carburetor.(3) ¼-20 x 1.5”BoltsIntakeHousingRingCarburetor InletGaskets (2)FrontHoldingBracketCarburetorWill beInstalledHere LaterCarburetorIntakeBootFigure C

CarburetorIntake BootCarburetorFrontHoldingBracketStep 7Place the rubber carburetor intake boot(or Carb Seal Ring as it is sometimecalled) on the aluminum tube.Note: This boot is not supplied with thekit. But can be purchased from aHarley Davidson parts supplier. Werecommend usingkutterharleyonline.com. Click HERE fortheir website.BracketBolts (3)Step 9Install and tighten the (3) bracket boltsusing a 3/16” allen socket.Step 8Ease the carburetor and front holdingbracket assembly into the boot, makingsure that it seats fully and forms a goodseal. A small amount of lubricant (goodold-fashion saliva will get the job done)will ease the installation of thecarburetor.

Choke HeaterOutlet Hose toWater PumpChoke HeaterInlet Hose FromIntake ManifoldWater PumpManifoldHeater CoreFigure D

Choke HeaterOutlet to WaterPumpDriver SideBrass FittingPassenger SideBrass FittingChoke HeaterInlet from IntakeManifoldStep 10Connect the heated choke hoses to thebrass fittings and snug the hose clamps.The inlet hose coming from the intakemanifold connects to the passenger sidebrass fitting and the outlet hose going tothe water pump connects to the driverside brass fitting. (See Figure D)Installing the Fuel Regulator and HosesRegulatorRegulatorBracketLarge BrassOutlet FittingStep 11Step 12Connect the fuel regulator to thecarburetor bracket and tighten thescrews.Install the large brass outlet fitting to thefuel pressure regulator using an 11/16”box end wrench.Note: We recommend wrapping teflontape on the threads of the fitting beforeinstallation.

Small BrassOutlet FittingCarburetorInletStep 13Step 14Install the small brass outlet fitting andcopper tube to the large brass fitting butleave it loose for now.Connect the other end of the rubberhose to the carburetor inlet and tightenthe hose clamp.wFloStep 15Tech Tip 15ATighten the small brass fitting using a1/2” open end wrench.Insure that the fuel filter is orientedproperly as shown here. And doublecheck all the hose clamps to insure theyare secure and tight.

RegulatorLock NutRegulatorAdjusterTo thedistributervacuumadvanceTech Tip 15BThe regulator pressure is not preset.Therefore, it will likely need to beadjusted. To adjust, loosen the regulatorlock nut (5/8” wrench) and turn theadjustment screw (7/32” Allen) clockwiseto increase the pressure and counterclockwise to decrease pressure.Step 16Connect this hose between the intakemanifold and the distributor vacuumadvance diaphragm.VERY IMPORTANT: Decrease the regulatorpressure IF bowl overfills after theinstallation. (Regulated pressure shouldbe approximately 2 psi or less.)Step 17Step 17 ContinuedUnused vacuum ports must be plugged.The following vacuum cups are enclosedwith the kit: (9) 1/8”, (2) 3/16”, (2) 1/4”, and(2) 5/16”. The arrows indicate which portsto plug.These ports need to be plugged as well.

Connecting the Choke (Enrichment) CableChoke CableChoke Cable AccessoriesStep 18Step 19Mount the cable pull knob under (orthrough) the dash using the locknut andwasher. Drill a hole through the firewallor use an existing hole to pass the cablethrough to the engine compartment.Assemble these choke cablecomponents to look like the next picture.Note: The choke cable is supplied withthis kit but the accessories are notsupplied with this kit. They should comewith the carburetor or can be purchasedfrom Harley Davidson. See Appendix Dfor part numbersChokeCableStep 19 ContinuedChoke cable assembled.Step 20Connect the choke cable to thecarburetor.

Cable Adjustment(Centered)Step 21Cut off the end of the stock Samuraiaccelerator cable at the cable stop. Turn the12mm nuts on the cable adjuster to centerthem. Place the cable in the bracket andmark the cable where the new cable stopmust be installed so that the cable stop willfit into the carburetor cam. Install the newcable stop, and then cut the excess cable off.You may need to cut the cable beforeinserting it in the cable stop. DO NOT CUTTOO SHORT. There is an adjustment behindthe accelerator pedal if you need to adjust thepedal height. To prevent the accelerator cablefrom flaring or spreading out, wrap the cablewith masking tape before cutting it and usesharp wire cutters.Cable Mark to Cut

CableStopCableCamStep 22Install accelerator cable stop on the endof the cable.Step 23Note: Be sure the cable is flush with thestop and the set screw is tight.Install the throttle cable into the cablecam.Tech Tip 23If you are using an e-pump, then youmust use a Napa 3040 or FRAM G3499Fuel Filter. It installs between the fuelpump and the regulator, with the returnline going back to the tank. Fuel linerouting as follows: fuel tank, e-pumpfilter, regulator and carburetor. Thereturn check valve must be removedwhen using an e-pump. This checkvalve is located approximately 10”behind the OEM fuel filter. Only a 1-4 lbe-pump can be used.Step 24There are several methods of dealingwith the Valve Cover Breather Vent.SideWinder CV recommends installingthe small filter provided in the kit into thevent hole. This filter must be cleanedperiodically to prevent pressure built up.

Step 25Install the supplied K&N air filter on theintake housing.Note: This filter will need to be cleanedperiodically.