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Ducati S2 Mille
The ultimate bevel V-twin
With Phil Aynsley
Along with its MHR Mille sibling, the S2 Mille was the ultimate model of Ducati’s well-known bevel-drive V-twin produced.
Attributable to confusion on the time of Cagiva’s takeover of Ducati (accomplished in 1985), the precise manufacturing numbers are a bit imprecise however one thing round 1100 to 1250 Milles in whole have been constructed (together with 300 S2s) throughout 1984-86.
It appears all the hassle that went into modernising the bevel-twin motor went principally to waste with such low manufacturing numbers!
Work on the brand new engine was begun in 1984 by Fabio Taglioni and assistant Massimo Bordi with an interim design getting used within the 1984 900 S2 and 900 MHR. The absolutely revised motor entered manufacturing on the finish of 1984.
The foremost change to the engine was the adoption of a excessive strain oil system and plain-bearing backside finish with one-piece crankshaft – thereby in the end eliminating the greater than sometimes problematic curler bearing big-end.
Bore and stroke have been each elevated to 88 x 80 mm leading to a capability of 973 cc moderately than the lengthy standing 864 cc of all of the earlier “square-case” 900s.
Gilnisil coated alloy cylinders and bigger (42 & 38 mm) valves have been used. A a lot smaller and lighter Nippon Denso starter motor was employed along with a brand new hydraulically operated clutch.
New engine circumstances accomplished the redesign. Most energy was 76 hp at 6700 rpm, whereas dry weight was 196 kg and high velocity 222 km/h.
Chassis, working gear (other than longer entrance fork tubes) and paint colors remained the identical because the short-lived 1984 900 variations (the 1983 900 S2 was gunmetal gray). The gear-gazer on the rear cam cowl is a non-standard addition to this 1985 bike.
Whereas initially meaning to proceed manufacturing of the bevel-drive V-twins (Massimo Tamburini was commissioned to design a brand new chassis for the Mille motor) Cagiva quickly determined to solely consider the a lot newer belt-driven Pantah motor powered bikes.
Vale the bevel-drive!
Ducati S2 Mille Specs
| Ducati S2 Mille Specs | |
| Engine | 4 stroke, 90° L-twin, SOHC, desmodromic two-valve per cylinder, bevel-gear pushed |
| Capability | 973 cc |
| Bore x Stroke | 88 x 80 mm |
| Induction | Twin 40 mm Dell’Orto PHM carbs |
| Max Energy | 76 hp @ 6700 rpm |
| Max Torque | 84 Nm at 5800 rpm |
| Gearbox | 5-speed |
| Suspension (F) | 38 mm Marzocchi fork |
| Suspension (R) | Marzocchi shocks, preload adjustable |
| Brakes | Twin 280 mm entrance rotors, two-piston calipers, 260 mm rear rotor, single-pot caliper |
| Tyres | 110/90-18, 130/90-18 |
| Size | 2200 mm |
| Width | 700 mm |
| Peak | 1250 mm |
| Wheelbase | 1500 mm |
| Seat Peak | 800 mm |
| Weight (dry) | 196 kg |
| Gasoline Capability | 18 L |
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