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Valach VM 120 B2-4T Instructions
3
Specifications Valach VM 120 B2-4T
Design:
Four-stroke flat twin engine OHV, 2 valves per cylinder, petroil lubrication.
Capacity:
120 ccm
Power:
approx. 10 hp
Bore:
47 mm
Stroke:
35 mm
Width over valve cover:
310 mm
Length:
168 mm (engine mount to front side of prop hub)
Prop screw divided circle:
34 mm
Prop screws:
6 pieces M5 Hex socket screw
Thread prop shaft:
M10x1
Engine mount:
with four M6 Hex socket screws.
Weight:
3800 g (including ignition and prop screws)
Idle RPM:
900 RPM
Maximum RPM:
6200 RPM
Recommended RPM range:
4500 to 5000 RPM on the ground (!)
Fuel mixture:
1:30 (1:25 while breaking-in)
Gasoline:
At least 95 octane, ideal BP/Aral Ultimate 102
Oil:
Valvoline SynPower 2T
Breaking-in time:
3 hours, the first 2 hours with 1:25 mixture
Needle setting:
Low speed needle (L):
1 3/4 turns factory setting for breaking-in
1 1/4 turns later with intake RAM tube (!)
High speed needle (H):
2 turns factory setting for breaking-in
1 1/2 turns later with intake RAM tube (!)
Ignition:
Valach microprocessor ignition.
Voltage range:
4.8 - 9 Volt, ideal 7.4 V (2 Lipo cells)
Safety shut off:
automaticly after 1 minute of the prop being stationary.
Spark plug:
NGK CM-6
Spark plug gap:
0.4 mm
Valve gap:
0.1 mm
Maintenance intervall:
Checking the valve gap:
All 4-5 hours, while breaking-in after 10, 20 and then 30 minutes.
Lubricating of rocker arm bearings and valve shafts:
All 4-5 hours, while checking the
valve gap.
