BSA Bantam Sports D14/4S Instruction Manual Download Page 4 | Manualshive

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The controls of the Bantam Sports. Note: Bushman models are not fitted with an
ignition switch, main beam warning light, or parking light, but are otherwise
similar.

Fig. 1. The Controls

The lower illustration shows the controls for the Bantam Supreme.

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Summary of Contents for Bantam Sports D14/4S

Page 1: ...175 c c Bantam Supreme Model D14 4 175 c c Bantam Sports Model D14 4S 175 c c Bushman Model D14 4B INSTRUCTION MANUAL www ClassicCycles org...

Page 2: ...AND Telephone Birmingham VICtoria 2381 Telegrams and Cables SELMOTO Birmingham B S A Motor Cycles Ltd Reserve the right to alter the designs or any constructional details of their manufacture at any t...

Page 3: ...pping for major overhauls but if any owner feels competent to carry out this type of work a service manual and an illustrated spares catalogue for this machine can be obtained from his B S A spares st...

Page 4: ...tam Sports Note Bushman models are not fitted with an ignition switch main beam warning light or parking light but are otherwise similar Fig 1 The Controls The lower illustration shows the controls fo...

Page 5: ...ORKS GEARBOX HUBS IGNITION TIMING LUBRICATION CHART LUBRICATION ENGINE ROUTINE MAINTENANCE REAR SUSPENSION RUNNING IN SPARKING PLUG STEERING HEAD TECHNICAL DATA TRANSMISSION WHEEL REMOVAL FRONT WHEEL...

Page 6: ...N4 020 in 025 in 012 in 18 degrees before T D C Transmission Gear ratios top third second first Supreme Sports 6 58 8 55 12 04 18 68 Bushman 8 1 10 5 14 8 23 0 Clutch friction plates 4 4 Chain size an...

Page 7: ...50 in 6 in 31 in 36 in 27 in Sports 77 in 50 in 6 in 30 in 36 in 23 in Bushman 78 in 50 in 10 in 30 in 40 in 27 in The recommended tyre pressures are based on a rider s weight of 154 lbs If the rider...

Page 8: ...e carburetter end The rotary stiffness of the twist grip can be varied by means of the adjuster screw and locknut It is set for average requirements when leaving the factory but can be readjusted to s...

Page 9: ...s one of which projects forward this being the gearchange pedal It affects the change from one gear to another The lever is of the positive stop type and returns to the central position after each cha...

Page 10: ...he clutch lever part way until the clutch can be felt to take up the drive and the machine tends to move forward Open the throttle a little more to prevent the possibility of stalling the engine and s...

Page 11: ...btain best results in all round performance especially with regard to acceleration and hill climbing capabilities It is not always appreciated that the power developed by an I C engine depends upon th...

Page 12: ...y have found its way into the crankcase during the running in process Make certain on replacing the plug that it is made really tight in order to prevent loss of crankcase compression During the runni...

Page 13: ...f petrol and oil required The correct proportion of oil to petrol is given on page 22 and the grades of oil recommended should be used as lighter grades may prove unsuitable For correct running of the...

Page 14: ...s are kept free from lubricant otherwise mis firing and difficult starting may occur Cleaning If the contact points are burnt or blackened clean with a fine carborundum stone or very fine emery cloth...

Page 15: ...piston which is difficult to detect If the cylinder head is removed a straight edge can be laid across the top of the barrel to act as a stop for the piston Bring the piston gently up to the straight...

Page 16: ...not be disturbed Next disconnect the air cleaner hose and remove the carburetter from the cylinder flange still attached to its cables and tie back out of the way The exhaust pipe must also be disconn...

Page 17: ...oloured patches they should be replaced by new rings and in this case particular attention should be paid to the fit of the ends of the rings on their locating pegs in the piston ring grooves and they...

Page 18: ...le or not you should seek expert advice This point is not likely to give trouble however provided that the machine has been carefully used and adequately lubricated for the big end bearing is of ample...

Page 19: ...mportant that the gap should be re set to specification 025 ins Gap adjustment should be made by bending the side wire The threads of the plug and the gasket seat should be wiped clean before refittin...

Page 20: ...the carburetter when the throttle is opened When the proper adjustment has been determined the engine may be running too fast and in this case the throttle stop should be unscrewed If considerable al...

Page 21: ...cleaning Remove the seat and then the right side panel when the filter fixing bolts and hose dips become accessible and the complete filter assembly can be withdrawn Removal of the clip screws allows...

Page 22: ...EDLE 10 AIR SLIDE 11 THROTTLE SLIDE 14 PILOT JET 15 NEEDLE JET 16 NEEDLE JET HOLDER 17 MAIN JET 18 FLOAT NEEDLE 19 FLOAT 26 THROTTLE STOP SCREW 27 PILOT AIR SCREW Fig 5 The Amal concentric carburetter...

Page 23: ...OF RECOMMENDED LUBRICANTS All the engine oils listed below are self mixing and must be used in the proportion of 1 part oil to 24 parts petrol i e 4 mixture given by the following 3 filler cap measure...

Page 24: ...age 22 No Item Page 1 2 12 10 Petroil Mixture Gearbox and Primary Drive Front Forks 12 22 12 26 12 28 GREASE No Part Page 3 4 5 6 11 Clutch Control Contact Breaker Cam Pad Swinging Fork Pivot Brake Ca...

Page 25: ...ment is about in 2 cm Primary Chain Lubrication This has a common oil supply with the gearbox and therefore does not require separate attention beyond the instructions for the gearbox Fig 6 Primary dr...

Page 26: ...val of the complete outer cover The adjusting pin presses against the clutch withdrawal rod with a steel ball interposed and the withdrawal mechanism must at all times be so adjusted that there is a s...

Page 27: ...of special clutch spring compressing tool 61 3191 When the spring pressure plate is removed the four plates carrying friction pads can be withdrawn together with their mating plain plates If the pads...

Page 28: ...engaged when the wheel is replaced Rear Wheel Removal Disconnect the speedometer cable from the drive unit and unscrew the adjuster from the brake rod The rear chain should be disconnected at its spri...

Page 29: ...contact when the brake is applied The brakes must not be adjusted so closely however that they are continually in contact with the drum otherwise excessive heat may be generated resulting in deterior...

Page 30: ...until any slackness has been taken up Do not over tighten or steering will be stiff and the ball races may be damaged Finally retighten the steering head clip bolt followed by those on the bottom yoke...

Page 31: ...starting system which when the ignition switch is moved to the emergency position connects all six coils together and providing that the lighting switch is in the Off position gives full output in ord...

Page 32: ...lean no service or adjustment should be required Since the rectifier is air cooled it is important to ensure that the air flow created whilst the machine is in motion is not obstructed Contact Breaker...

Page 33: ...ng and ignition systems are fed by a simple 6 pole alternator generating set supplying the ignition system which incorporates an ignition coil designed especially to operate on the energy transfer pri...

Page 34: ...ary slacken the two screws on the lamp side and move the lamp until with the main driving light switched on the beam is projected straight ahead and parallel with the ground With the lamp in this posi...

Page 35: ...Fig 10 Wiring Diagram Supreme and Sports models 34 www ClassicCycles org...

Page 36: ...Fig 11 Wiring Diagram Bushman model 35...

Page 37: ...PARTS ACCESSORIES Click on links below OEM parts online schematics EU OEM parts online schematics US Shop Revzilla for the latest in Motorcycle Accessories Save Up to 45 on Motorcycle Tires J P Cycle...

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