PRE-UNIT A SERIES QUICK IDENTIFICATION
| A7 | 1947-1950 495 cc OHV 2 cylinder 62mm x 82mm |
| 1951 on 497cc OHV. 2 cylinder 66mm x 72.6mm | |
| 1947 | A7 Twin introduced. Four speeds, rigid frame with telescopic front forks, 7" brakes 31/2 gallon tank, Speedo in tank, special centre stand, quickly detachable hubs fitted. During year special stand replaced by normal stand, oil feed to exhaust rocker. |
| 1948 | A7 Twin Speedo moved to fork top. |
| 1949 | A7 Twin Spring frame with plunger rear suspension optional extra due to two part frame construction, left front engine plate pierced for dynamo, E3L dynamo. MCR2 cvc., inlet rocker oil feed, revised front mudguard stay lugs on fork legs, one piece front hub. |
| A7 Star Twin introduced, similar to A7 twin but higher revving engine, twin carburettors, spring frame standard. | |
| 1950 | A7 Twin revised gear set, tyre pump on chainguard. |
| A7 Star Twin, valanced front mudguard. | |
| 1951 | AA7.101 Engine ZA7R.6001 Frame A7 Twin, new overhead valve twin cylinder engine with new cylinder head and rocker box, modified crankshaft, alloy connecting rods, additional positive oil supply to camshaft trough, positive earth electrics, first use of manual ignition control, rigid frame end. |
| AA7S.101Engine ZA7S.14001 Frame A7 Star Twin, as A7 Twin but with high compression pistons, single Amal carburettor, spring frame, valanced front mudguard, matt silver and chromium tank and wheels, special distinguishing badge on tank, 8" front brake. | |
| 1952 | A7 Twin, improved mechanical breather, improved 7" brakes, spring frame only, pre-focus headlight, underslung pilot light, ball ended extension to main stand. |
| A7 Star Twin, modifications as A7 twin. | |
| 1953 | BA7.101 Engine BA7S.101 Frame A7 Twin, headlamp enclosed in cowl incorporating speedometer, ammeter, and switch, boxed in rear number plate including stop and tail light and reflector, 8" front brake, finned collar on exhaust pipe, rubber mounted petrol tank. |
| BA7S.101 Engine BA7S.101 Frame A7 Star Twin, modification as A7 twin except 8" front brake previously fitted. | |
| 1954 | CA7.101 Engine CA7.101 Frame A7 Twin continued fitted with swinging arm frame, engines have re-designed cylinder barrel and head to increase fin area for cooling, one bolt petrol tank fixing, and dualseat as standard on new frame. |
| CA7S.101 Engine CA7.101 Frame A7 Star Twin modifications as A7 Twin. | |
| CA7SS.101 Engine CA7.101 Frame A7 Shooting Star introduced, as A7 Star Twin except alloy cylinder head, separate inlet manifold. | |
| July 1954 | A7 Twin plunger model discontinued. |
| BA7S.2585 Frame A7 Star Twin discontinued. | |
| CA7S.303 Engine CA7.5948 Frame A7 Star Twin swinging arm frame discontinued. | |
| September 1954 | CA7.1501 Engine CA7.7001 Frame A7 Twin, swinging arm rear suspension standard, pilot light in reflector, steering head lock, new Monobloc carb.. |
| A7 Shooting Star, modifications as A7 Twin. | |
| November 1955 | CA7.2701 Engine EA7.101 Frame A7 Twin, full width alloy hubs with 7" brakes with brake cross shaft in swinging arm pivot. |
| CA7SS.2301 EngineEA7.101 Frame A7 Shooting Star as A7 Twin with 8" brakes, integral cylinder head and manifold. | |
| October / November 1957 | CA7.5001 Engine FA7.101 Frame A7 Twin, fitted with sidecar lugs, 7" full width cast iron hubs and brakes, improved clutch and silencer, new headlamp cowl and roll on center stand, RB107 CVC, split front fork ends. |
| CA7SS.4501 Engine FA7.101 Frame A7 Shooting Star modifications as A7 Twin, front brake 8" . | |
| September 1959 | CA7.7101 Engine GA7.101 Frame A7 Twin modified rear brake, new design of mudguards, RB108 CVC, centre stand spring on left. |
| A7 Shooting Star modifications as A7 Twin. | |
| May 1962 | CA7.10020 Engine GA7.23137 Frame A7 Twin discontinued. |
| CA7SS.9343 Engine GA7.23021 Frame A7 Shooting Star discontinued. | |
| A10 | 646cc OHV 2 cylinder 70mm x 84mm |
| 1950 | A10 Golden Flash twin introduced, 4 speeds, rigid frame with telescopic front fork, plunger rear suspension optional, brakes 8" front 7" rear, 41/4 gallon tank. |
| 1951 | A10 Golden Flash, twin positive oil supply to engine camshaft trough. |
| 1952 | A10 Golden Flash, spring frame as standard, improved oil breather. |
| 1953 | A10 Golden Flash, headlamp cowl incorporates Speedo, ammeter and switch. Rear number plate incorporates stop and tail lamp and reflector. Petrol tank rubber mounted, prop stand lug welded on to frame, finned collar on exhaust. |
| 1954 | BA10.7001 Engine BA7S.8950 Frame A10 Golden Flash, redesigned cylinder head and barrel with greater fin area to aid cooling. |
| CA10.101 Engine CA7.101 Frame A10 Golden Flash, Swinging arm rear suspension optional, engine modifications as with plunger model. | |
| September 1954 | A10 Golden Flash, spring frame, pilot light in reflector, steering head lock |
| A10 Golden Flash swinging arm frame, modifications as spring frame but with Monobloc carburettor. | |
| November 1955 | EA7.101 Frame A10 Golden Flash, swinging arm frame, full width hubs. |
| June 1956 | CA10R.2001 Engine EA7.101 Frame A10 Road Rocket introduced ( previously USA only ), as A10 swinging Arm but with higher compression engine, TT carb. and different gears. |
| July 1957 | BA10.16036 Engine BA7S.20289 Frame A10 Golden Flash, spring frame model discontinued. |
| October 1957 | CA10R.5744 Engine EA7.13027 Frame A10 Road Rocket discontinued. |
| October/ November 1957 | DA10.651 Engine FA7.101 Frame A10 Golden Flash, higher compression motor with reinforced crankshaft, fitted sidecar lugs, full width hubs 8" front brake and 7" back brake. |
| CA10R.6001 Engine FA7.101 Frame A10 Super Rocket introduced, as A10 Road Rocket but with higher compression motor, with improved cylinder head and port design. Modifications to frame as A10 Golden Flash. | |
| Sept 1959 | DA10.7801 Engine GA7.101 Frame A10 Golden Flash, modified rear brake, new design of mudguards, RB108 CVC, centre stand spring on left. and larger bore carburettor. |
| DA10R.101 Engine GA7.101 Frame A10 Super Rocket, modifications as A10 | |
| September 1961 | DA10R.5958 Engine GA7.21120 Frame A10 Super Rocket changed gear ratios, floating brake shoes, new exhaust system with optional siamized exhaust. |
| January 1962 | DA10R.6762 Engine GA10.101 Frame A10 Rocket Gold Star as A10 Super Rocket but with higher compression motor 4speed close ratio gearbox, Gold Star Frame, siamezed exhaust. |
| August 1962 | DA10.17719 Engine GA7.23558 Frame A10 Golden Flash discontinued available only for export. |
| August 1963 | DA10R.10388 Engine GA7.25001 Frame A10 Super Rocket discontinued. |
| DA10R.10388 Engine GA10.1914 Frame A10 Rocket Gold Star discontinued. | |
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