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S&S Cycle Motorcycle Accessories - page 1
1 Instruction Sheet #51-1 160 04-28-04 Copyright®, 2003 by S&S Cycle, Inc. All rights reserved. Printed in the U.S.A. Because e v ery industry has a leader S&S T win Cam Style Engine Assembly and Installation Instructions S & S Cycle , I nc. 14025 County Highway G Box 215 V iola, W isconsin 54664 Phone: 608-627-2080 • Fax: 608-627-14 ...
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S&S Cycle Motorcycle Accessories - page 2
2 SAFE INST ALLA TION AND OPERA TION RULES: Before installing any S&S engine part, it is your responsibility to read and follow all instructions. The rules below are for your personal safety , and must be kept in mind at all times. ● Gasoline is extremely flammable and explosive under certain conditions, and toxic when inhaled. Do not smoke a ...
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S&S Cycle Motorcycle Accessories - page 3
S&S Basic T win Cam Style Engines for Evolution Style Chassis * Displacement Bore Stroke Fuel System Finish Assembled Part Number Natural 31-9340 124" 4 1 ⁄ 8 "4 5 ⁄ 8 " Carburetor 1 Black 31-9341 Natural 31-9343 124" 4 1 ⁄ 8 "4 5 ⁄ 8 " S&S VFI 2 Black 31-9344 S&S Basic T win Cam Style Engines f o r ...
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S&S Cycle Motorcycle Accessories - page 4
B. Additional Features: ● Greater overall strength than stock crankcases, especially in the front motor mount, an important consideration in high performance applications. ● All oil passages between the crankcase and cam support plate are o-ring sealed. ● Compatible with stock components. Use stock oil pump, cam support plate, gear cover , et ...
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S&S Cycle Motorcycle Accessories - page 5
5 C. Modification Notes S&S Cycle cautions against modifying these crankcases due to the possibility of damaging or weakening them. Modifying S&S crankcases in any fashion voids all manufacturer warranties. Should the customer elect to modify the crankcases regardless, it is imperative that they and the information tag attached to them be i ...
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S&S Cycle Motorcycle Accessories - page 6
6 CAUTION - Improper alignment of engine and frame mounts may cause abnormal stresses resulting in damage to crankcases or other parts. 2. T est-fit instructions for T win Cam style cases with Evo Style motor mounts. 1. Assemble case halves using case bolts. T ighten to snug. T orquing bolts to final specification is not necessary . 2. Clean frame ...
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S&S Cycle Motorcycle Accessories - page 7
CAUTION - Failure to observe the above may result in engine damage not covered under warranty . 1. Crankcase preparation before assembly . NOTES - S&S crankcases are sold in matched sets only . Individual case halves are not available. S&S T win Cam style engines are shipped with cylinder studs installed Before assembling engine, verify tha ...
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S&S Cycle Motorcycle Accessories - page 8
3. Coat right main bearing and race with assembly lube. , then join left and right crankcase halves. 4. T ighten 5⁄16" case bolts to 18 ft-lbs, tighten 1⁄4" center bolt to 120 in-lbs. in the sequence shown. See Figure 1. 5. Install drive sprocket spacer and sprocket shaft oil seal in main bearing race of left case. Spring side of seal ...
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S&S Cycle Motorcycle Accessories - page 9
9 Use tool to guide bearing rollers onto inner race Picture E9 Picture E12 Picture E10 Picture E13 Picture E1 1 Figure 1 Picture E7 1 2 3 4 5 6 7 8 9 Picture E8 ...
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S&S Cycle Motorcycle Accessories - page 10
10 2. Inspect pistons, especially areas around machined surfaces such as ring grooves and wristpin holes. De-burr as necessary , taking care to remove particles that could become dislodged inside engine. 3. Measure ring end gaps and adjust as necessary . See Pictures E13 and E14 a. Compression ring end-gaps should be between .017” to .025”. b. ...
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S&S Cycle Motorcycle Accessories - page 11
11 5. Install cylinder heads 1. Place head gasket on top of cylinder . Locate on dowels installed in cylinder . NOTE - Head gaskets should be installed clean and dry . 2. Before installing heads spin each head bolt down on its respective stud to be sure threads are clean and free of contamination. Place a drop or two of oil on threads and under hea ...
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S&S Cycle Motorcycle Accessories - page 12
9. Compression releases and rocker cover installation. Refer to the included instructions to install the compression releases and rocker covers NOTES: ● If S&S compression releases will be installed, it is much easier to install them before the rocker covers are installed and the engine is installed in the frame. S&S die-cast T win Cam st ...
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S&S Cycle Motorcycle Accessories - page 13
H. Fuel system installation and tuning NOTES - S&S Engine assemblies are available with either carbureted or fuel injected systems. Assembled Engines are shipped with the carburetor or fuel injection system installed. Refer to the included instructions for operation and tuning . Unassembled Engines are shipped with the fuel system packaged sepa ...
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S&S Cycle Motorcycle Accessories - page 14
NOTE - S&S oil line, oil tank fittings, and oil conduit block fittings have a larger diameter than OEM components. CAUTION - Do not use the existing OEM oil tank fittings with S&S oil line #50-8157. The OEM fittings are not large enough diameter for the S&S oil line. NOTES: ● lnstallations must use supplied S&S oil tank fittings i ...
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S&S Cycle Motorcycle Accessories - page 15
NOTES: ● If oil fails to appear at oil sender hole within 30 seconds of starter operation, allow the starter to cool. verify that oil line routing is correct and that the oil tank is full to the proper level ● Oil pressure indicator lamp should light when ignition is turned on. Lamp will go out after engine is started and there is oil pressure ...
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S&S Cycle Motorcycle Accessories - page 16
2. Engine break-in 1. Closely monitor engine for excessive heat build-up. Do not allow the engine to idle for long periods of time. Be especially watchful when air temperatures exceed 90 degrees. Slow speed operation in urban areas during the summertime is especially hard on engines.. T emperature for engine oil should be between 180º - 240º F . ...
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S&S Cycle Motorcycle Accessories - page 17
17 Displacement Bore Stroke Compression Ratio 124” 4-1⁄8” 4-5⁄8” 10.8:1 Cylinder Heads Specification V alve guide in head (tight) .0015”-.003” V alve seat in head (tight) .005”-.0075” V alves Specification Service (Fit in guide.) Wear Limit Intake .0012”-.0015” .0025” Exhaust .0018”-.0023” .0035” Seat Width .040”-.06 ...
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S&S Cycle Motorcycle Accessories - page 18
18 S&S Recommended Regular Service Intervals Item Interval Engine Oil & Filter ...........................................Change at 50, 500, 2,500 miles, every 2,500 ........................................................................ miles thereafter . 1 Air Cleaner .......................................................Inspect at 50 a ...
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S&S Cycle Motorcycle Accessories - page 19
19 1 2 6 4 5 33 31 18 14 12 11 16 17 12 14 10 7 19 25 27 24 26 13 15 30 29 28 20 25 32 21 23 22 3 9 8 7 1. Bolt, stator 10-24 x1" SHC - 4 required (HD#2720) (10 Pack) . ..................... 50-0194 2. Seal, sprocket shaft (HD#12068) ................................... 31-4035 3. Bearing, T imken (HD#9028) .......... 31-4013 4. Bolt, case 5/16 ...
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S&S Cycle Motorcycle Accessories - page 20
Because e v ery industry has a leader ...
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