Howard Davies 75, 500 cc 1927
En förhållandevis kortslagig (kvadratisk) toppventils JAP-motor.
This picture and specifications are from the book Vincent HRD Gallery with permission from the author, Roy Harper
...Tekniska data
...Specifications
Motortyp JAP 1-cyl. OHV Standard Engine typ JAP 1-cyl. OHV Standard
Slagvolym 490 cc Capacity 490 cc
Borr x slag 85,7 x 85,0 mm Bore x stroke 85,7 x 85,0 mm
Förgasare Binks two lever eller Amal Carburettor Binks two lever or Amal
Tändsystem ML magnet Ignition ML magneto
Smörjsystem Pilgrim mekanisk pump (Castrol XL) Lubrcation Pilgrim mechanical pump (Castrol XL)
Växellåda Burman 3-växlad, utväxling 4.64, 6.87 och 9.35 Gearbox Burman 3-speed, ratios 4.64, 6.87 and 9.35
Transmission Primärkedja ½ x .305" Transmission Primary chain ½ x .305"
Sekundärkedja 5/8" x 1/4" Secondary chain 5/8" x 1/4"
Bromsar fram: 6" bak: 7" Brakes front: 6" rear: 7"
Däck, fram & bak 26 x 3,25" Dunlop TT Pattern Cords Tyres, front & rear 26 x 3,25" Dunlop TT Pattern Cords
Bränsletank 2 gallons (9 liter), lackad svart / guldrand Petrol tank 2 gallons, painted black / gold
Oljetank 2 pints (1,1 liter) Oil tank: 2 pints
Hjulbas 53½" (136 cm) Wheelbase 53½"
Ram HRD single loop, lackad svart Frame HRD single loop, painted black
Framgaffel Webb Front fork Webb
Toppfart 75 Mph (120 km/t) Top speed 75 Mph
Pris 63 Guineas (66,15 £) Price 63 Guineas (66,15 £)