VM 170 B2-4T
Displacement: 170 cc
Output: ca. 13 hp
Bore: 52 mm
Stroke: 40 mm
Width: 352 mm
Length from engine mount to prop hub: 185 mm
Engine weight: 5260 g
including ignition: 5450 g
Ignition voltage range: 4.8 - 9 V
Idle RPM: 900 rpm
Max RPM: 6200 rpm
Propeller: RPM:
Menz 2-Blade:
30×12″ 5300 rpm
32×12″ 5100 rpm
34×12″ 4700 rpm
Fiala Prop 2-Blade:
30×14″ 5650 rpm
32×12″ 5350 rpm
32×14″ 5050 rpm
34×12″ 5000 rpm
34×14″ 4700 rpm
36×14″ 4050 rpm
Fiala Prop 3-Blade:
30×14″ 4850 rpm
Fuel: 1:30
Valvoline SynPower 2T / Aral Ultimate 102 or Shell V-Power 100Due to the rather pungent smell of normal grades of petrol and the alcohol content, we recommend to use either Aral Ultimate 102 or Shell V-Power in conjunction with the synthetic two stroke oil Valvoline SynPower 2T.
  • Sensational smooth running and high torque
  • Spontaneous throttle response and smooth midrange transition
  • Extremely low vibration throughout the RPM range because of the four stroke principle
  • Honda Valves
  • Walbro Carburetor
  • Valach microprocessor controlled ignition with auto advance and retard
  • An ignition integrated voltage converter allows the use of two LiPo cells
  • VM-Motors are designed using the latest tools and techniques
  • Rapid spares delivery and repair service from Germany by Toni Clark practical scale GmbH

The Czech Valach company’s VM 170 B2-4T is a four-stroke horizontally opposed twin with overhead valves and pushrod operated valve rocker arms, the camshaft is fitted inside the crankcase.

Lubrication is by adding oil to the petrol, same as for 2 stroke engines. The single Walbro pump carburetor is mounted onto a bifurcating block fixed to the rear of the engine, a formed aluminum induction tube is fitted between the bifurcating block and both inlet valves. The crankshaft is a very rugged construction running in ballraces front and rear.

The legendary perfectionist Henry Royce of Rolls Royce always insisted that an engineering construction to be right must look right. I defy anyone to tell me the Valach Twin does not look right.

Price: £ 2,220.00