Year | Model | Notes |
| 1952-53 | Model 88 Dominator De-Luxe | 497cc [68 x 72.6mm] compression ration 6.7:1 engine from Model 7; iron head; pre mono-bloc carb 276; rear brake light; featherbed frame with rear subframe bolted to the main section; short roadholder forks; angular contact ball bearing steering races; top dash panel for speedo, ammeter and light switch; underslung pilot lamp; pear-shaped mufflers; tool tray beneath the seat. Tank held down by top strap with rubber pads on frame tube rails; front tyre 3.25 x 19 inch; engine sprocket 20 T |
| 1953 | | lighter front mudguard; 3.00 x 19 front tyre |
| 1954 | | 8inch front brake |
| 1955 | | alloy cylinder head; monobloc carb 376, 1-1/16in; subframe welded to main frame; full width alloy hubs; rear number plate boxed in; round plastic badges on the tank |
| 1956 | Model 99 introduced | "Model 99 engine 596cc [68 x 82mm]; monobloc carb 376, 1-1/16in; compression ration raised to 7.4:1; 21T engine sprocket so overall gearing was higher
Model 88 compression raised to 7.8:1
new oil tank with ribs and matching battery box; dash panel removed; speedo, ammeter and light switch in headlight; pilot light in headlight;" |
| 1957 | | AMC gearbox (introduced in 2nd half of 1956?); tubular silencers; round footrest rubbers; extra finning on cylinder head between exhaust ports; front brake drum cast without bolts; petrol tank painted with separate chrome side panels |
| | Model 77 introduced | single down tube brazed frame with swing arm used; same engine and gearbox as 99; long roadholder forks and half width hubs; front tyre 3.25 x 19 inch |
| 1958 | | 88 and 99 alternator and coil ignition; Lucas RM15 alternator; cover over front engine plates where dynamo was previously located; Options included :twin carbs ; 9.0:1 pistons. Model 77 ends. |
| 1959 | | new camshaft. Options: chromed mudguards |
1960 | | |
| 1960 | De-Luxe models with enclosures | slimline featherbed frame; rear enclosures on 88 De-Luxe and 99 De-Luxe, that required extra brackets on the frame. Original version known as De-Luxe since 1955 became the standard model; compression ratio increased to 8.1:1 for 88 and 7.6:1 for 99; twin carbs only available on standard model (too dificult to fit under enclosures). New dual seat for Standard and De_Luxe twins with locating pegs at the fron and spring gclip sat the rear. New silncers, new 3.6 gallon petrol tank with restyled tank badges |
| 1960 | 88 Nomad | |
| 1960 | Manxman | USA only. 646cc Manxman introduced [68 x 89mm]; twin carbs with downdraft inlet tracts; 8.3:1 compression, tacho; magneto ignition; siamesed exhaust; high handlebars 3.25 x 19 front tyre; 4.10 x 18 rear tyre; chrome plated mudguards and chaincase. |
| 92270 | 600cc Standard | Aug 1960 |
| 92460 | 600cc De-Luxe | Sep 1960 |
| 93235 | 500cc standard | October 1960 |
| 93385 | 500cc De-Luxe | October 1960 |
| 93601 | 650cc | Nov 1960 |
| | | Speedo on all but 650 120mph (150kph); 650 150mph(180kph) optional on others. Options: Worked cylinder head for non SS models, dual carbs non De-Luxe models; high compression piston for non SS models; steering dampers on all; fully enclosed rear chain case on all; chrome mudguards on all standard models, tacho on all non SS models, racing footrest on all; folding footrest on all; folding kickstart lever on all; chromed front chaincase on all, |
1961 | |
| 1961 | Manxman available in UK and Europe | compression ratio increased for 88 to 8.5:1 and 99 to 8.25:1; seat fastening at rear by quarter turn Dzus fastener. 646cc Manxman introduced [68 x 89mm]; twin carbs with downdraft inlet tracts; 8.3:1 compression, tacho; magneto ignition; siamesed exhaust; normal handlebars; same size tyres as other models; finished in two-tone grey, listed as "650". Options: chrome plated mudguards and chaincase; steering dampersl; air cleaners; fully enclosed rear chaincasel; tacho (rev counter) optional on all non SS models |
| 96496 | 99SS | March 1961 sports specials with tuned motors; twin carbs 1-1/16 inch; siamesed exhausts; ball ended levers; polished internals, hotter camshaft. Options included tacho and rear sets. Colours:two-tone grey. |
| | 88SS | March April 1961 sports specials with tuned motors; twin carbs 1-1/16 inch; siamesed exhausts; ball ended levers, polished internals, hotter camshaft, magneto ignition with manual advance. Options: tacho, rear sets, air cleaner. Colours:green or Dove grey. |
| | 650 | Oct 1961 |
| | 650SS 650 De-Luxe | 650 SS and De-Luxe; all with downdraft inlet tracts; only 650SS with twin carbs; compression raised to 8.9:1; 88SS received the new head and compression raised to 9.5:1; magneto ignition with automatic advance. 99SS retained old style head with splayed ports and coil ignition; RM19 alternator on all models. SS models use Avon rear tyres. Options: air cleaner, tacho (650SS) |
1962 | | |
| 1962 | Atlas | 745cc motor [73 x 89mm] 7.6:1 compression; single carb; magneto ignition; smaller tank; raised bars; chrome plated mudguards standard; |
| 97227 | 500cc De-Luxe ends | August 1962 |
| 103392 | 99SS ends | August 1962 |
| 103801 | 99 De-Luxe ends | August 1962 |
| 103929 | 99 standard ends | August 1962 |
| 104121 | 650 De-Luxe ends | August 1962 |
| 101918 | 500cc standard ends | Sept 1962 |
| 102911 | 500cc 88SS ends | Sept 1962 |
| 104123 | 650SS | Sept 1962 |
| 104267 | 650 Standard | |
1963 | | |
| 1963 | | De-Luxe models ends; 99 models ends; |
| | 500cc 88 standard ends | Sept 1963 |
| | 650 Standard ends | Sept 1963 |
1964 | | |
| 1964 | | Models are 88SS, 650SS, Atlas; wider fork leg spacing to fit wider tyres; 12v electrics; steering locks; Atlas - twin carbs. Options: alloy rims; rear chaincase |
| 108000 | First UK Atlas | Feb 1964 |
| 109512 | 88SS introduced | Sept 1964 |
| 110375 | 650SS | Sept 1964 |
| 111377 | Atlas | Sept 1964 |
1965 | | |
| | | wider rear chain 95/8inch x 3/8inch) all models |
| 111920 | | Oct 1965. strengthened con-rods fitted 650Ss and Atlas |
| 114870 | | Oct 1965. cylinder barrel spigot removed and new head gasket design; modified cylinde rhead to take short rockers. 650SS and Atlas |
1966 | | |
| 115871 | | |
| 116372 | | Feb 1966. 6-start oiling system, 650SS +Atlas |
| 116667 | | Mar 1966. short front fork tubes fitted C15CS |
| 116966 | | Mar 1966 twin floats monobloc carburettor |
| 117626 | | May 1966. valve insert diameter increased |
| 118151 | 500cc 88SS ends | July 1966 |
| 118252 | | June 1966. force fit studs for alternator |
| 118752 | | Sept 1966. self lock nuts for force fit studs |
1967 | | |
| 1967 | | RM21 alternator; twin AMAL Concentric 930 carbs; matching speedo and tacho on plate between top fork nuts; light switch between instruments. |
| 119760 | | 650SS +Atlas |
| 120323 | N15CS | May 1967 |
| 120572 | | Feb 1967. single dot roller bearing |
| 121007 | | Feb 1967. Concentric carbs; 650SS +Atlas |
| 121307 | | Mar 1967. capacitor ignition 650SS +Atlas |
| 121665 | P11 | May 1967 |
| 121710 | | May 1967. P11 jets 250- 270 No air cleaner
|
| 122436 | | Jun 1967. Head bolts torqued to 240 in/lbs
|
| 123164 | 650 | July 1967 |
| 123364 | | Aug 1967 |
| 123666 | Commando | Aug 1967 |
| 123672 | | Sep 1967. new rear portion front chaincase G15CS |
| 124372 | P11A | Oct 1967. All P11A models: new type contact braeaker, street fork springs and damper, modified oil tank, low exhaust pipe, dual seat, rear lamp (new type), pillion footrests |
1968 | | |
| 1968 | | capacitor ignition system, dual set with hump; Atlas ends |
| 124372 | P11A | Jan 1968 |
| 125780 | Atlas ended | Mar 1968 |
| 125871 | | Feb 1967. P11A long valves and short push rods first fitted |
| 126124 | 650 | Feb1968 |
| 126125 | Commando | Mar 1968. First Commando engine |
| 128646 | P11A Ranger | Sept 1968. P11A new type sleeve gear and layshaft pinion first fitted |
| 129147 | Mercury | Sept 1968 650SS renamed Mercury with one 930 Concentriccarb; no tacho; tacho optional. Options: stainless steel mudguards. |
| 129145 | Ranger ends | Nov 1968 |
| 129892 | P11A | Dec 1968. P11A heat treated mainshaft washer first used |
| 129897 | | Dec 1968. P11A security bolt fitted to rear wheel |
1969 | | |
| 1969 | | 650SS renamed Mercury with one 930 Concentriccarb; chromed guards; no tacho; tacho optional. Options: stainless steel mudguards. |
1970 | | |
| 1970 | | Mercury ends |
| 129894 | | Feb 1970 |
When is a Dominator not a Dominator?
The Manxman (first 650) was referred to as a Manxman and not a Dominator.
The Atlas was the Atlas 750 and not a Dominator.
