|
SPECIFICATION SHEET FOR 259cc DUCATI Mark 3 1967 (narrowcase)
|
|
Description
|
Specification
|
Supplier
|
|
Rear Wheel
|
2.75 x 18 alloy spoked
|
|
|
Rear wheel sprocket spacer
|
none
|
|
|
Rear sprockets assorted
|
As per measurements - one off machined by Sprockets Unlimited in Dural
|
Sprockets Unlimited
|
|
Rear Tyre
|
Avon AM21 100/90 H18 pressure 29 psi
|
Five One Wheelbuilding
|
|
Rear Caliper
|
drum brake
|
|
|
Front Wheel
|
2.5 x 18 alloy spoked (akront rim)
|
|
|
Front Caliper
|
drum brake
|
|
|
Front Tyre
|
Avon AM20 90/90 H18 - pressure 28psi
|
Five One Wheelbuilding
|
|
Chassis
|
Ducati 250 Mach III
|
Ducati SpA
|
|
Engine
|
Ducati 250 Mach III Bore x stroke 74 x 57.8. Single cylinder SOHC. (249cc). 10:1 compression. Air cooled. (Narrowcase)
|
Ducati SpA
|
|
Cam
|
Green & white
|
|
|
Carburettor stub adaptor
|
Amal
|
Surrey Cycles
|
|
Carburettor
|
AMAL Mk II 32 or 34 mm carb. 220 Main jet, 106 needle, “A1 (5 notch) or 2C3 (3 notch) needle. 3 or 3.5 cutaway slide.
|
|
|
Front Forks
|
Hydraulic Ducati forks. Rechromed by Dynasurf Ltd.
|
Dynasurf Ltd
|
|
Rear Shock unit
|
Ducati twin shock system
|
|
|
Chain
|
0.5” x 5/16” classic chain - Regine gold with copper rollers.
|
|
|
Front Sprocket
|
15 tooth 250 front sprocket or 16 tooth 350 sprocket
|
|
|
Oil
|
Silkolene Classic R SAE 40 - however, monograde oil is recommended rather than castor
|
Main Classic suppliers
|
|
Petrol
|
Four Star
|
|
|
Points (if not using electronic ignition)
|
Ducati - gap 14 thousandths. Timing 21 degrees advance when cold, 39-41 degrees advance above 3000 revs.
|
|
|
Tappets
|
Tappet clearance - IN 6 thou, Ex 8 thou.
|
|
|
Spark Plug
|
B8HV
|
|
|
Carb jets
|
220 Main jet.
|
|
|
Seat Unit
|
Staccato products standard fibreglass
|
Staccato
|
|
Fairing
|
Aermacchi fairing
|
|
|
Screen
|
Aermacchi
|
|
|
Exhaust
|
Believed one off hand made
|
|
|
Exhaust header
|
Believed one off hand made
|
|
|
Petrol Tank
|
Original metal 250 Ducati
|
|
|
Footrests, hangers, gear level, brake lever
|
One off hand made
|
|
|
Gear lever connecting rod
|
One off hand made
|
|
|
Ignition
|
Points based
|
OE
|
|
Battery(normal)
|
6v
|
|
|
Filler cap
|
Standard Monza type - internal spring is 450 Ducati clutch spring
|
Demon Tweaks
|
|
Cables
|
Venhill engineering one off hand made to ducati pattern.
|
Venhill
|
