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INSTRUCTIONS

1. HARLEY DAVIDSON J00050 INSTRUCTIONS REV 6 24 97 Kit Number 29081 90C SCREAMIN EAGLE EVOLUTION XLH HI FLO CARB amp AIR CLEANER General This kit is designed for use on 1986 and later Evolution Sportster XLH models ACAUTION Harley Davidson motorcycles equipped with some Screamin Eagle high performance engine parts may not be used on public roads and in some cases must be restricted to closed course competition This engine related performance part is intended for racing applications and is not legal for sale or use in California on pollution controlled motor vehicles Engine related performance parts are intended FOR THE EXPERIENCED RIDER ONLY NOTE On 1988 and later models you must replace the intake manifold Use a stock replacement 1987 style manifold for proper installation of the carburetor and air cleaner kit See Figure 1 This kit contains the following components Description VOES fitting Gasket Manifold spacer Carburetor assembly Allen head bolt 5 16 18 x 2 in Washer 5 16 in Lockwasher 5 16 in Air cleaner adapter assembly Allen head bolt 1 4 20 x 2 3 4 in Nut 1 4 20 in Washer 1 4 20 in Carburetor gasket Back plate Button head screw 1 4 20 x 3 4 in Support spacer 5 16 in ID Support spacer 17 32 in ID Hex head bolt 5 16 18 x 3 1 2 in Allen head bolt 1 2 13 x 3 1 2 in Washer 5 16 in ID Washer 17 32 in ID Lockwasher 5 16 in ID L
2. and allow to air dry Do not dry with Slow beed compressed air p 27383 88 4 Oil element using air cleaner oil Apply along the full length 27302 84 of each pleat and allow to set until the element is a uniform 27329 83 color Allow excess oil to drain off Install element and 27284 85 cover 27310 85 27318 85 NOTE 27283 85 A new filter element Part No 29025 88B can be purchased 27896 79 from your Harley Davidson dealer 27894 78 27895 87 27897 78 Intermediate Air Fuel 27113 87 27109 87 27172 89 27110 87 27111 87 27112 87 27173 89 27106 85 27107 85 27149 85 27151 85 27150 85 27108 87 27119 88 27134 89 Figure 7 Air Cleaner Element and Backplate In carburetor J00050 40f6 onono dd dodo NORZUR SOW 1 Air cleaner element ou osooor aS Part No 29081 90C Date 6 97 gt Service Part UA EIVIGE ar S XLH Hi Flo Carburetor and Air Cleaner Kit Item Description Part No VOES fitting 29190 85 Gasket 27022 88 Manifold spacer 29275 88 Carburetor assembly 27001 88 Allen head bolts 3485A Washer 6702 Lockwasher 7041 Air cleaner adapter 27041 90 Allen head bolt 885A Nut 7686 Washer 6228W Carburetor gasket 27044 90 Backplate 29075 91 Button head screw 927A Support spacer small I D 6786 Support spacer large 1 D 6785 Hex head bolt 3427 Allen head bolt 3587A Washer 6333 Washer 6738 Gasket 27077 78 Lockwasher 7068 Air cleaner cover spacer 31523 88 Counter sunk allen
3. head screw 3795 Crankcase breather hose fitting 29034 85 O ring 11110 Hose clamp 9946 Venturi 29148 90 Air cleaner element 29025 88B Vacuum hose kit 26553 94 Air cleaner trim 29024 88 Screamin Eagle Throttle Cable Selection Guide 96 Screamin 96 Screamin 96 Screamin 95 OE Throt 95 Screamin 96 OE Throt Eagle Eagle Throt Eagle Idle Year Model Cable P N Eagle P N Cable P N Ass y P N Cable P N Control P N 89 95 XL 56308 88 56298 88 56308 96 56416 96 56413 96 56419 96 XLS N A N A 56308 96 56416 96 56413 96 56419 96 XLC N A N A 56381 96 56415 96 56412 96 56418 96 J00050 60f6
4. mount Tighten the frame bolts to 30 35 ft lbs Tighten the cylinder head bolts to 21 27 ft lbs 15 On 1990 and earlier models route the crankcase breather hose to the fitting on the back of the backplate Slip the hose over the fitting and tighten the hose clamp CHOKE See Figure 9 The carburetor choke knob should be pulled up for initial or cold starting Push the knob down as soon as the engine is warm enough to run without stumbling Vehicle can be driven with the knob up the first few blocks AIR FUEL MIXTURE See Figure 9 The air fuel mixture screw is set initially at one full turn outward from the full in position DO NOT set idle speed or smoothness with this screw The screw must be set within 1 8 turn of the one full turn position for optimum performance ENGINE IDLE SPEED See Figure 9 Idle speed is set with the throttle stop screw Set engine idle speed at 1000 1150 rpm with engine at normal operating temperature ACCELERATOR PUMP See Figure 9 If your vehicle has an off idle hesitation you may have to adjust the accelerator pump stroke Do this by adjusting the accelerator pump screw after all other adjustments have been made Since off idle hesitation can be caused by either a too lean or too rich pump stroke you will have to determine which way to turn the screw by experimentation Turn screw 1 4 turn at a time JETS See Figure 9 If your vehicle s engine is relatively unmodified it will run well with th
5. not visible in photo Use Loctite 271 red and tighten the air cleaner adapter bolts and nuts ACAUTION Be sure throttle plate returns to full idle position idle adjusting screw against stop when throttle grip is released Turn handlebars lock to lock to check 11 Hold spacers and backplate in position against cylinder heads and install support spacer bolts washers and lockwashers Check alignment of carburetor spacer and manifold Tighten all support spacer bolts 12 Tighten the manifold allen head bolts and nuts at the cylinder heads without changing the carburetor position 4 Allen head bolt 5 Washer 6 Lockwasher Gasket Manifold spacer Carburetor assembly Figure 2 Manifold Spacer Gaskets and Carburetor 2 of 6 3 Nut 4 Washer 1 Air cleaner adapter 2 Bolt Figure 3 Air Cleaner Adapter and Carburetor Y fitting 1 Hose long 3 2 Hose short Figure 4 VOES Connections on 1995 and Later Models 13 See Figure 7 Place air cleaner element 1 over air cleaner cover spacers Install air cleaner cover washers and screws Tighten screws J00050 1 Air cleaner adapter 2 Carburetor gasket Figure 5 Air Cleaner Adapter and Carburetor Gasket NOTE The air cleaner element is pre oiled and requires no service upon installation For service interval and procedure see Air Cleaner Element Maintenance section at end of this Instruction Sheet 14 Install top center engine
6. acuum operated fuel valve Discard hoses Disconnect choke enrichener cable and remove carburetor 6 On 1988 and later vehicles remove the intake manifold Installation Carburetor NOTE O After disconnecting the choke enrichener cable remove the top center engine mount Use a piece of wire or string and let the bracket and related parts hang from the handlebar This will allow you easier access to the manifold nuts and bolts O The right rear corner of the front cylinder head will probably interfere with the carburetor throttle pulley and cable guides You will have to grind away enough material for proper clearance Doing this will not harm the structural integrity of the cylinder head Be certain to cover manifold or ports so metal chips do not get into engine O f you grind approximately 0 33 in off the short end of the allen wrench it will make installation of the manifold allen head bolts easier 1 See Figure 1 Make VOES connection by drilling and tapping a hole for a 1 4 28 thread in manifold spacer 1 at position indicated by boss visible through slot on the 1 of 6 carburetor side of the spacer Apply Loctite Pipe Sealant with Teflon to threads on VOES fitting 2 supplied with kit and install fitting in threaded hole in spacer NOTE If you do not use the VOES with the carburetor kit you can expect poor mid range performance and reduced fuel economy 2 On 1988 and later vehicles install 1987 style intake m
7. anifold Do not tighten manifold bolts or nuts at this time NOTE The large I D gasket goes on the large I D side of the manifold spacer towards carburetor 3 See Figure 2 Assemble gaskets 1 manifold spacer 2 and carburetor assembly 3 to manifold using allen head bolts 4 washers 5 and lockwashers 6 Tighten bolts 4 Align the carburetor 4a See Figure 3 Install the air cleaner adapter 1 on the carburetor throat using bolts 2 nuts 3 and washers 4 Do not tighten nuts at this time 4b See Figure 5 Place the carburetor gasket 2 and the backplate in position on the carburetor Use two button head screws diagonally opposite each other and snug the backplate up to the carburetor NOTE O For 1986 1990 models use the 5 16 in ID spacers O For 1991 and later models use the 17 32 in ID spacers 4c Install the air cleaner support spacers on the backplate and cylinder heads using the hex head bolts or allen head bolts washers and lockwashers Do not tighten bolts at this time At this point be sure the carburetor throttle pulley and cable guides clear the cylinder head 5 Remove the two button head screws backplate and carburetor gasket Do not move the carburetor AWARNING Check for fuel leaks after installing fuel lines 6 On 1994 and Earlier Models Connect the fuel line and the VOES hose Replace original throttle cables with 1 Manifold spacer 2 VOES fitting Figure 1 Manifo
8. e jets that come in the carburetor Depending on the level of performance modifications that you have done to your vehicle your vehicle may run better with different size jets than those which are furnished in the carburetor The chart which follows lists the carburetor jets available Your Harley Davidson Dealer can order the jets listed in the chart NOTE All the carburetor jets are slightly rich If engine runs too rich just off idle use a 65 slow speed If engine is rough or jerky at 55 65 mph remove the blank intermediate speed jet and install a 80 Air Cleaner Element Maintenance 1 Remove air cleaner cover and inspect cleaner element every 5000 miles or more often under dusty conditions 3 of 6 Air cleaner cover 3 Screw allen head spacer 4 Gasket carburetor Backplate 5 Venturi 1 Carburetor choke 4 Accelerator stop screw 2 Air fuel mixture screw 5 Speed jet 3 Throttle stop screw Figure 6 Air Cleaner Cover Spacers and Backplate ACAUTION Figure 8 Carburetor Adjustments Do not let dirty air filter cleaner degreaser solution run to inside of filter 2 To clean element remove it and wash it by rolling it in a shallow pan containing a small amount of air filter cleaner degreaser no more than 3 4 the depth of filter pleats Jet Chart 3 Remove element from cleaner and allow five minutes for Jets and Part cleaner to dissolve dirt From the inside out rinse the filter with cold water Shake
9. ld Spacer Boss J00050 appropriate Screamin Eagle cables see chart on last page for selection See applicable Service Manual for detailed cable installation and routing information On 1995 and Later Models See Figure 4 Connect the fuel line Install new VOES hoses to Y fitting in the following manner a Connect new long hose 1 to Y fitting 3 in previous location noted in Step 5 of Removal section of this instruction sheet Connect remaining end of long hose 1 to vacuum operated fuel valve b Connect new short hose 2 to Y fitting 3 and remaining end to VOES fitting on manifold spacer 7 See Figure 5 Align the air cleaner adapter 1 on the carburetor throat Do not tighten bolts at this time 8 See Figure 6 Install the air cleaner cover spacers 1 on the backplate 2 using the counter sunk allen head screws 3 The screw heads fit into the counter sunk screw holes in the backplate 2 Both ends of the spacers have counter sinks one end is tapered and the other end is bored The screws 3 go in the bored end 9 On 1990 and earlier models drill a 3 8 in hole in the backplate 2 approximately 2 in from the rear and bottom edge of the backplate Install the crankcase breather hose fitting and O ring in the hole Place hose clamp on breather hose 10 See Figure 6 Assemble carburetor gasket 4 backplate 2 and venturi 5 to the air cleaner adapter using the button head screws
10. ockwasher 17 32 in ID Air cleaner cover spacer Counter sunk allen head screw 5 16 18 x 5 8 in Crankcase breather hose fitting O ring Hose clamp Venturi Air cleaner element Vacuum hose kit 9 lt See SH 2 ANNNNNNNNNN AaANDNNNNDN pNnN Removal NOTE Refer to applicable Service Manual for detailed instructions to remove necessary components Service Manuals are available from your Harley Davidson Dealer 1 Remove stock air cleaner assembly AWARNING Gasoline is extremely flammable and highly explosive Do not smoke or allow open flame or sparks anywhere in the area when servicing any part of the fuel system 2 Turn fuel valve to OFF position Disconnect fuel line at carburetor and drain any remaining gas into proper container AWARNING Use red fuel storage container only Storing gas in unapproved container could create a dangerous situation such as fuel leakage leading to explosion or fire hazard 3 Refer to applicable Service Manual and remove fuel tank 4 Disconnect the throttle cables at the throttle and carburetor and discard 5 On 1994 and Earlier Vehicles Disconnect Vacuum Operated Electrical Switch VOES and choke enrichener cable Remove carburetor On 1995 and Later Vehicles Noting position of hoses for later reinstallation of new hoses disconnect VOES by disconnecting short hose from carburetor and remove hose from plastic Y fitting Remove long hose from Y fitting and v

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