Racing Notes

Here are some technical notes Alex made after three races. They may be of interest if you are technically minded or rebuilding a Douglas. The wording is exactly as he wrote in his note book, including abbreviations.

Narre Warren 18th June 1938

• very greasy conditions
• G.B. motor ratio 5.83
• Standard flywheel
• 2 Gripsters. Pressures 8lbs front and 15lbs rear
• Stanavo 87 and 3oz meth per gallon
• KLG K55 plugs
• original reamed jets 38 front 40 rear
• 20 deg camshaft
• Comprerssion ratio 7.6-1

Data from Minature T.T. - 1st January 1940

• 27 miles 5th place
• 500cc D.T. motor
• G.B. flywheel (standard)
• Gear ratio 4.42 (too high?)
• Gold Pax spirit
• C.R. gearbox
• Jets 38 rear and 40 front (over rich)
• Fuel used approx 1 gallon
• Oil used 1/3 pint
• Oil pump half open
• 20 deg camshaft
• KLG 902 plugs 14mm long reach
• Carb settings for 50/50 mix of Vac 2 and Vac 3.
• Standard jet holders (weak when cold)
• Jets approx size 52
• Needle in max high position
• Large cutaway on throttle slide

Data from Minature T.T. (Altona) 18th August 1940

• 1st in Solo Scratch 10 laps. Time 18.4
• 500cc D.T. motor
• E.W. flywheel
• Gear ratio 5.94 (18-29-16-59) C. ratio
• Fuel 1/3 vac.3 and 2/3 vac. 2
• B.R.4 Lodge plugs
• Fuel used approx 3/4 gallon for 10 laps
• Oil pump 3/4 open
• 20 deg camshaft
• Tyre pressures 11lb. front and rear
• Carb setting

Gear Ratios

• Altona 5.94
• Fisherman's Bend 6.78