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  5. Instruction Book

A.J.S. 8, 14 Instruction Book

Summary of 8, 14

  • Page 1

    Instruction book model 14 250 c.C. O.H.V. 350 c.C. O.H.V. Model 8 issued by a.J.S. Motor cycles : l o n d o n s.E.18 proprietors: associated motor cycles ltd. Www.Ajs-matchless.Info.

  • Page 2: Www.Ajs-Matchless.Info

    Www.Ajs-matchless.Info.

  • Page 3: Plumstead

    Model 14-250 c.C. O.H.V. Model 14/cs 250 c.C. O.H.V. Scrambler model 8-350 c.C. O.H.V. Factories: burrage grove and maxey road plumstead, s.E. 18 telephone: woolwich 1223 (7 lines) telegrams: "icanhopit, wol-london" cables; "icanhopit, wol-london" telex 22617 codes: a.B.C. 5th and 6th edition; bentl...

  • Page 4: Contents

    Contents carburetter controls data driving electrical equipment engine forks and frame free service guarantee information lubrication maintenance repairs and service spare parts tools and special equipment transmission wheels and brakes 22 7 4 8 40 15 30 52 55 47 10 14 49 53 54 25 37 page … … … … … ...

  • Page 5: Safety  On  The  Road

    He modern motor cycle unquestionably provides one of the most healthy, economical and pleasant means of transport. In addition, by reason of its superb braking, high power to weight ratio and ease of control it is, if used with due care, one of the safest vehicles on the road. It is our sincere desi...

  • Page 6: Data

    Data identity 350 c.C. Engine number on the crankcase near engine plate cowling frame number on right side of frame head lug cylinder bore 72 mm. Stroke 85·5 mm. Cubic capacity 347 c.C. (21·17 cu. Ins.) type 389/42 amal monobloc (12° inclination) main jet (without air filter) 220 main jet (with air ...

  • Page 7: Data

    Data 250 c.C. Identity engine number on the crankcase near engine plate cowling frame number on right side of frame head lug cylinder bore 69·85 mm. Stroke 64-84 mm. Cubic capacity 248·5 c.C. (15·2 cu. Ins.) carburetter type 376/250 amal monobloc (12° inclination) main jet (without air filter) 180 m...

  • Page 8: 250  Scrambles  Model.

    250 scrambles model. Engine capacity bore and stroke compression ratio carburetter amal monobloc choke diameter main jet no. Pilot jet no. Slide no. Needle position needle jet petrol tank capacity oil tank capacity brakes rear chain primary chain sparking plug (for running-in) sparking plug (for rac...

  • Page 9: Controls

    Controls throttle twist grip. On right handlebar. Twist inwards to open. When fully closed engine should just idle when hot. Valve lifter. Small lever on left side handlebar. Air lever. Small lever on right handlebar. Pull inwards to increase air supply to carburetter. Once set, when engine has warm...

  • Page 10: Driving

    Driving fuel although various quality fuels are again available owners are advised to use only the best. The small economy that might be considered to accrue by using the cheaper grades is more than offset by the advantages obtained by using only premium grades. Fuel supply two fuel feed taps are si...

  • Page 11: Www.Ajs-Matchless.Info

    To engage a higher gear the pedal is pressed downward with the toe and a lower gear is obtained by raising the pedal with the instep. To engage first gear from the neutral position, the pedal is therefore raised. After each pedal movement, internal springs return the pedal to its normal horizontal p...

  • Page 12: Lubrication

    Lubrication lubricants to use efficient lubrication is of vital importance and it is false economy to use cheap oils and greases. The use of multigrade oils is not recommended. We recommend the following lubricants to use in machines of our make. For engine lubrication hot above 50° f sae 50 mobiloi...

  • Page 13: Www.Ajs-Matchless.Info

    Checking oil circulation provision is made to observe the oil circulating, which is visible after removing the oil filler cap on the right side of the crankcase. Illustration 1 cut-away section of engine engine lubrication system this is by true dry sump system. The oil tank, or reservoir, is integr...

  • Page 14: Engine  Oil  Pump

    Engine oil pump (see illustration 1) if, for any reason, the crankcase is dismantled the oil pump plunger must be removed from its housing before attempting to separate the crankcase halves. It is also necessary to remove the small timing pinion. Important under no circumstances must either the pump...

  • Page 15: Gear  Box  Lubrication

    Exhaust valve stem lubrication from a drilling in the exhaust rocker axle boss in the rocker box, oil is fed to a cavity in the cylinder head. A further drilling from this cavity, through the cylinder head to an oil hole in the valve guide, provides positive lubrication for this part of the engine a...

  • Page 16: Maintenance

    Maintenance periodical maintenance regular maintenance attention to lubrication and certain adjustments must be made to ensure unfailing reliability and satisfactory service. This necessary attention is detailed below and owners are strongly recommended to carefully follow these suggestions and to m...

  • Page 17: Engine  Service

    Engine service tappet adjustment the top ends of the two long push rods have screwed extensions. These are locked in position by nuts, thereby providing tappet adjustment. The correct tappet clearances, with valves closed and engine warm (not hot) is nil. This means the push rods should be free enou...

  • Page 18: Decarbonisation

    To remove t w i n seat remove two bolts under the rear end of the seat, release the nuts securing the front portion of the seat, which now can be lifted off. To remove the petrol tank close both petrol taps, unscrew the two cap nuts securing the petrol pipe (watch for 4 fibre washers each side of th...

  • Page 19: Valve  Grinding

    Illustration 3 the valve guides and the needle adjusting screw are also shown withdrawn valve grinding the grinding is accomplished by smearing a thin layer of fine grinding paste (obtainable ready for use at any garage) on the valve face and then, after inserting the valve in the head, partially re...

  • Page 20: Refitting  The  Piston

    Removing the cylinder a n d piston with the cylinder head removed, the barrel can be raised vertically to clear the holding down studs. Before doing so, position the engine with the piston on the top of its stroke, have available a piece of clean rag. Raise the cylinder sufficiently to enable the ra...

  • Page 21: Ignition  Timing

    Refitting the cylinder barrel fit a new cylinder base gasket, after removing broken pieces of the old one. Use a little jointing compound on the base of the cylinder and stick a new gasket to it, no jointing compound should be on the crankcase face. Set the piston ring gaps at 120°, pass the cylinde...

  • Page 22: To  Check  The  Timing

    Illustration 5 automatic ignition advance mechanism (approximate ignition setting) to check the timing position the engine as detailed for tappet adjustment. Remove the sparking plug, the cover for the contact breaker and engage top gear. Obtain a short length of stiff wire or wheel spoke about 5" l...

  • Page 23: Ignition  Timing

    To reset ignition timing as the ignition advance is limited to ¼" b.T.D.C, this setting is critical and must be carefully carried out. The automatic ignition control unit is a taper fit on the camshaft, retained by a central bolt. To remove this unit take out the retaining bolt, use in its place a w...

  • Page 24: Carburetter  Service

    Carburetter service the information given in this section includes all that will normally be required by the average rider. For further details, particularly those connected with racing and the use of special fuels, we refer the enquirer to the manufacturers of the carburetter, amal ltd., holford ro...

  • Page 25: Www.Ajs-Matchless.Info

    Illustration 6 carburetter details in assembly order 23 www.Ajs-matchless.Info.

  • Page 26: Air  Filter

    Air filter in locations, such as the united kingdom, where the roads and atmosphere are particu- larly free from dust, it is not considered necessary to have an air filter fitted to the carburetter, but in countries where the atmosphere contains a very heavy dust content, an air filter is essential ...

  • Page 27: Transmission  Service

    Transmission service the gear box the gear box, cylindrical in shape, is housed in an arc machined on the crankcase, and retained by two high tensile steel straps. As the gear box mainshaft is eccentric to the gear box shell, partial movement of the gear box in its housing provides latitude for fron...

  • Page 28: Www.Ajs-Matchless.Info

    Dismantling the kickstarter when the gear box cover is removed, the kick-starter mechanism will come out with the cover. The face ratchet pinion is under tension of the ratchet spring, to remove this pinion temporarily fit the kick-starter crank and relieve the spring tension, the pinion will then b...

  • Page 29: A N D Engine Sprocket

    To remove chaincase outer cover use a tray under chain case to catch oil. Remove drain plug, remove near side footrest. Remove engine plate cowling (two screws). Remove three snap connectors on wire in black sheath, push the sheath towards the chain case a small amount. Remove six cover screws and i...

  • Page 30: Clutch  Adjustment

    To replace clutch control cable reverse the above instructions and, finally, adjust as detailed earlier. Locate the cable in front of the gear box clamp bolt. Clutch adjustment attention to the clutch is usually confined to adjustment of the operating mechanism. To avoid clutch slip or clutch drag, ...

  • Page 31: Front  Chain  Adjustment

    Clutch spring adjustment in the event of clutch slip, first ascertain that the operating mechanism is correctly adjusted (see clutch adjustment). After dismantling the clutch, when refitting the clutch spring adjusting nuts, they should be screwed on until the spring stud just protrudes through the ...

  • Page 32: 250  C.C.  Model

    Fork and frame service 250 c.C. Model steering head adjustment with the machine on the stand, need for adjustment of the steering head bearings may be detected by trying to rock the forks with hands holding the fork legs. The bearings should be tested for slackness after the first 200 miles and subs...

  • Page 33: Www.Ajs-Matchless.Info

    250 c.C. Front forks 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 043343 043245 000201 043345-6 043246 043259 043251 021579 000005 043253 043344 043347 043256 043257 043258 000203 043260 043261 000373 000011 000004 043262 043263 043235 043236 043240 00002...

  • Page 34: 350  C.C.  Model

    350 c.C. Model steering head adjustment the steering head bearing must be kept in close adjustment otherwise if movement develops which is not promptly corrected damage can occur to the ball-races. To make this adjustment the front wheel must be raised clear of the ground by using a box under the cr...

  • Page 35: Www.Ajs-Matchless.Info

    Illustration 12 350 c.C. Front forks for description see page 34 33 www.Ajs-matchless.Info.

  • Page 36: Www.Ajs-Matchless.Info

    Ref. No. Description 1. 2. 3. 4. 5 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. Washer, leather, for fork spring top seating. Buffer, rubber, for...

  • Page 37: Rear  Suspension

    Rear suspension the rear wheel is mounted in a fork which is hinged just behind the gear box. The fork works in bronze bearings and is lubricated by an oil reservoir around the bushes and this can be replenished with heavy gear oil (sae 140) by means of a grease nipple situated above the pivot on th...

  • Page 38: Centre  Stand

    Maintenance is confined to external cleaning and occasional greasing of the cam ring adjuster. Should a squeak or rubbing noise develop as the units move, remove in turn each unit, uncover the spring by removing the top split collars, grease the external diameter of the springs and reassemble. The c...

  • Page 39: Wheels  And  Brakes

    Wheels and brakes to remove the front wheel (350 c.C. Model) with the front wheel clear of the ground, disconnect the front brake cable, then remove the nut that secures the brake torque arm to the front brake cover plate. Release the four nuts (no. 31, illustration 12), unscrew the front wheel spin...

  • Page 40: Www.Ajs-Matchless.Info

    Illustration 14 front hub assembly s p in d le , f r o n t w h e e l 1 w a s h e r , fr o n t w h e e l s p in d le (3 50 c. C. O n ly ) . 2 le ve r , b r a k e s h o e e x p a n d e r . 3 n u t, b r a k e s h o e e x p a n d e r le v e r . 4 w a s h e r , b r a k e s h o e e x p a n d e r le v e r ...

  • Page 41: Www.Ajs-Matchless.Info

    Illustration 15 rear hub assembly 39 www.Ajs-matchless.Info.

  • Page 42: Electrical  Service

    Electrical service general the lighting and ignition systems are combined, using a six pole permanent magnet excited a.C. Generator, which charges the battery via a selenium rectifier. The remaining electrical units are fed from the battery in the normal manner. The alternator unit has inherent regu...

  • Page 43: Contact  Breaker  Unit

    Contact breaker unit this unit comprises the contact set, condenser and cam lubricating pad. The contacts are adjusted by releasing the locking screw and then setting the distance by a slight movement of the eccentric screw whilst the rocker arm heel is on the peak of the cam lobe, and finally tight...

  • Page 44: Www.Ajs-Matchless.Info

    Sparking plug (single or 3-point) the k.L.G. Type fe80 "corundite" plug is fitted to all models. It has a thread of 14 mm. And the reach is ¾". The point gap is ·020 to ·022°. Check the point gaps every time the engine is decarbonised and, if necessary, re-set the points. See that the plug is fitted...

  • Page 45: Bulbs  Blowing

    Temperature of filling room, battery and electrolyte should be maintained between 60° f. And 80° f. Batteries filled in this way are 90 per cent. Charged. After filling, a dry charged battery needs only the attention normally given to lead-acid type batteries. Battery ma i n t e n a n c e . Deterior...

  • Page 46: Www.Ajs-Matchless.Info

    Illustration 20 wiring diagram: 250 c.C. Scrambler 44 www.Ajs-matchless.Info.

  • Page 47: Www.Ajs-Matchless.Info

    Illustration 21 wiring diagram: 250 c.C. Scrambler (with lights removed) 45 www.Ajs-matchless.Info.

  • Page 48: Www.Ajs-Matchless.Info

    Illustration 22 wiring diagram (model 8 and 14) 46 www.Ajs-matchless.Info.

  • Page 49: Useful  Information

    Useful information tracing troubles engine fails to start, or is difficult to start, may be due to: carburetter flooded unnecessarily. Water on high-tension cable. Moisture on sparking plug. Oiled up, or fouled, sparking plug. Throttle opening too large. Pilot jet choked. Air lever in open position ...

  • Page 50: Steering  Unsatisfactory

    Excessive oil consumption excessive oil consumption may be due to: badly worn, or stuck up, piston rings. (causing high pressure in the crankcase). Worn valve stems. Excessive petrol consumption excessive petrol consumption may be due to: leaks in the petrol feed system. (damaged fibre washers, loos...

  • Page 51: Repairs  And  Service

    Repairs and service repairs the instructions regarding repairs should be clear and definite, otherwise the cost may be greater than that expected. We shall be pleased to give estimates for repairs if parts are sent to us for that purpose. If the estimate is accepted, no charge is made for the prelim...

  • Page 52: Service

    The registration book and the licence disc will bear the registration numbers that have been allotted to your machine and will also show the date the road licence expires. Your number plates must then be painted, in white upon a black background, with the registration numbers in characters of even t...

  • Page 53: Www.Ajs-Matchless.Info

    The driver a n d the law the driver of a motor cycle must be insured against third party claims and m u s t be able to produce an insurance certificate showing that such an insurance is in force. If your insurance certificate specifies you can only drive one particular machine you mus t n o t drive ...

  • Page 54: Free  Service  Scheme

    Free service scheme free service scheme all owners of new models are entitled to one free service an d inspection at 500 miles, or, at latest, three months after taking delivery. This service is arranged by the supplying dealer to whom the free service voucher must be handed. This voucher, together ...

  • Page 55: Spare  Parts

    Spare parts enuine spare parts purchased from an authorised dealer, or from the factory, are identical with the parts originally built into your motor cycle. By using them you are assured that they will fit accurately and give satisfactory service. Spares stockists for the convenience of owners spar...

  • Page 56: Tools

    1 2 1 1 1 2 1 1 1 1 1 1 1 017253 017007 017114 017249 017257 017052 017053 017252 023284 021625 042540 018667 042570 tool roll. Tyre lever. Pump. Adjustable spanner. 8 " x x " spanner. X " x 4 " spanner. C " x a " spanner. Plug spanner and tommy bar. Suspension unit spanner. 6" screwdriver. Feeler g...

  • Page 57: Guarantee

    Guarantee 1. In this guarantee the word "machine" refers to the motor cycle, scooter, motor cycle combination or sidecar as the case may be purchased by the purchaser. 2. In order to obtain the benefit of this guarantee, the purchaser must correctly complete the attached registration form and return...

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