Engine/Frame
Frame numbers: three digits, unsequential, no relation to engine number. Daventry bikes have four-digit engine numbers, starting 0050 – the lowest production engine number. The first engine to be used, however, was 0054. Hesleydon/Broom bikes have an engine prefix BHV1000 (British Hesketh V1000) followed by three digits, starting 501. Approximately 250 bikes were built at the Daventry factory and Hesleydon works; others have been assembled from parts. Mick Broom can usually date machines.
Service Data – Hesketh V1000
Recommended plug type - NGK DR8ES
Plug gap - 0.024-0.028in
Ignition timing - programmable advance curve, 22° @ 3000rpm, 37° @ 6000rpm
Valve clearances inlet/exhaust - 0.004in/0.006in
Engine oil type - Mobil 1 4T
Engine oil capacity - original engines: 4.5L, current engines: 3L
Oil change - 3000 miles
Recommended oil filter life - 3000 miles
Fork oil type - SAE20
Head bearing type - taper roller
Tyre pressures - 32/36psi (crossply), 36/45psi (radial)
Headlamp bulb - 12v 60/55 Halogen P43T
Air filter type - paper element, change as required
Final drive chain type - 530 HD O-ring. Chain tension 1⁄2in (13mm)
1984 Hesketh V1000 Specification
Engine Type - air-cooled, dohc, 90º four-stroke V-twin
Capacity - 992cc
Bore x stroke - 95 x 70mm
Compression ratio - 9.5:1
Carburation - 2 x 36mm DellOrto
Primary/final drive - gear/chain
Clutch/gearbox - wet multiplate/five-speed
Electrics - 12v, Lucas RITA electric ignition
Frame - tubular steel open cradle frame
Front suspension - Marzocchi telescopic forks.
Rear suspension - swingarm, twin Marzocchi shocks
Brakes front/rear - 2 x 11in discs, 1 x 11in disc, single pot calipers
Wheels - Astralite alloy
Tyres, front/rear - 110/90 19, 130/90 17
Dry weight - 550lbs/250kg
Wheelbase - 59.5in/1511mm
Seat height - 33in/838mm
Fuel capacity - 5.06 gals/23 litres
Top speed - 114.2mph *
Max power - 82bhp @ 6000rpm *
Fuel consumption - 31mpg *
* Dec 1983 (Vampire)
Further Info – Contacts
● Broom Development Engineering
01280 841842. Manufacturer of Hesketh machines and parts.
www.broom.engineering.btinternet.co.uk