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Valach Motors VM 85 B2-FS


Valach Motors VM 85B2-FS

  • Sensational smooth running and high torque 
  • Spontaneous throttle response and smooth mid-range transition 
  • Extremely low vibration throughout the RPM range because of the four stroke principle 
  • Nickel-Silicon plated cylinder surfaces 
  • 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

With the Valach VM 85B2-FS the legendary Valach "voice" and smooth running characteristics are now available also for your smaller sized models. The VM 85B2-FS is the perfect engine for our Sopwith Pup, our 33% scale Pitts Special S1-S, the 33% scale Piper L4 Grasshopper and the quarter scale Bücker Jungmeister from Paolo Severin. The VM 85B2-FS sounds just like the famous VM 120B2-4T, pleasing but powerful, and at a warm low frequency.

Due to being a four stroke boxer twin, the low vibration is nothing but sensational, and torque is really high. The response to the throttle being opened is so smooth without the slightest attempt to surge, making the Valach VM 85B2-FS absolutely ideal not only for scale models but also for aerobatic models and glider towing.

The VM 85B2-FS is also available with a starter. With the current version of the VM 85B2-FS the starter can be retrofitted anytime.


  • Displacement: 85 cc 
  • Bore: 42 mm 
  • Stroke: 32 mm 
  • Width including valve covers:  280 mm 
  • Length from engine mount to prop hub:  167 mm 
  • Engine weight: 2940 g 
  • including ignition:  3120 g 
  • Ignition voltage range:  4,8 - 9 V 
  • Propeller:   Fiala Prop 2-blade, 26x12", 26x14", 27x10"
Valach Motors

Valach Motors

Company Fiala prop s.r.o., division Fiala Motors -  from year 2013 started also with four stroke motors as continuing not still existing company Valach Motors. Gradually began to expand  range of motors and in 2015 the motors are renamed to Fiala Motors. Valach Motors is still used for german company Toni Clark.
Now the range of motors contains one cylinder motors ( 60 and 70 ccm), two cylinder boxer motors ( 85,120, 140, 170 and 210), two cylinder inline motor 120 ccm, four cylinder 280 ccm,  five cylinder radial motor ( 250 and 420 ccm) and top is seven cylinder radial motor 800 ccm. Outside model use company Fiala Prop s.r.o. developed and put to market special UAV motors. It is 4-stroke boxer with electronic ignitron, electronic injection, electric generator and regulator. The power of generator  could be another  due to customer  order. This motor has  excelent suitability for a given application instance for example, that his ceiling is 5000 m above sea level and has an extremely low fuel consumption, allowing the device driven by this motor  lasted very long in the air without refueling .

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