Technical data of the Estafette 500
Motor
- 77 mm bore
- 105 mm stroke
- 489 cc
- 14 hp @ 4200 rpm
- 5.5 : 1 compression ratio
- 2.5 litres lube oil tank
- gastank 17 litres
- 0.15 mm inletvalve play
- 0.20 mm exhaustvalve play
- inlet opens : 0.5-1mm before TDC
- inlet sluit: 20-21 mm after BDC
- exhaust opens: 25-25 mm before BDC
- exhaust closes: 4-5 mm after TDC
...One day, one day I will convert stroke-mm to crank degrees..
- magneto to be set with maximum retard, at TDC, or 0.5 mm BTDC
- breakerpoints: 0.3-0.4 mm play
- plug: 0.4-0.5 mm between the electrodes
- 24 mm Amal carburettor, 140-150 main jet, 6,3 slide, and the needle should be in the third groove
- 6V, 40 W DC dynamo
Gears and end drive
- 12.8 : 1 -first gear
- 8.25 : 1 -second gear
- 5.9 : 1 -third gear
- 4.57 : 1 -fourth gear
- rear wheel chain 5/8" x 3/8"
- chain sprockets 19 and 38 teeth
- rims 19" x 3", size 9
- tires 26" x 3.5"
- wheelbase 1.38 m
