VM 210 B2-4T - Four-stroke Power!
Drawing VM 210 B2-4T Silencers for the VM 210 B2-4T SynPower2T #7294 Video VM 210 B2-4T Instruction manual VM 210
Displacement: 210 cc
Power: ca. 16 hp
Bore: 52 mm
Stroke: 50 mm
Width including valve covers: 385 mm
Length from engine mount to prop hub: 185 mm
complete with ignition,
two exhaust stacks,
prop washer and prop bolts
6125 g
Ignition voltage range: 4.8 - 9 V
Idle RPM: 800
Max RPM: 5500 

Fiala propellers 2-blade:


Static thrust with 36x14" FIALA prop:

35 kp at
4800 rpm

Fuel: 1:30
Valvoline SynPower 2T / Aral Ultimate 102

Due to the rather pungent smell of normal grades of petrol and the ethanol content, we recommend to use Aral Ultimate 102 in conjunction with the synthetic two stroke oil Valvoline SynPower 2T



We recommend the use of an intake ram tube, it will improve the throttle response of your engine and reduce fuel consumption.

Aluminium Ansaugtrichter #7480 für VM 170, VM 210 und VM R5-420

Ram Tube ...... #7480  Toni Clark Webshop
This aluminum intake ram tube is for the VM 170, VM 210 and VM R5-420. Length 60 mm, inner diameter 22 mm, weighs only 12 g.


Carbon Ansaugtrichter #7481 für VM 170, VM 210 und VM R5-420

Carbon Ram Tube #7481 Toni Clark Webshop
This noble and super light carbon intake ram tube is made by hand in our own workshop. The intake tube is fixed to the carburetor without a gasket with the delivered custom made screws. Length 60 mm, inner diameter 22 mm, weight 7g. Suitable for VM 170, VM 210 and VM R5-420.


Y-Stück #7365

Y-Fitting ......... #7365 Toni Clark Webshop

This Y-fitting makes it easy to remove the unwanted oil from the pressure tube of the carburettor. Loop-in the two "branches" into the pressure tube and extend the "trunk" about 6-12 cm to lead it to the lower side of the cowling. Place the Y-fitting underneath the carburettor and the surplus oil will be gathered into the "drainage tube" and can be dumped from time to time, without removing the cowling.

Attention: do not forget to close the tube securely with a plug!

Silencers   Valvoline Oil and HHS 5000

We reserve the right to alter prices and specifications without prior notice.         June 1st 2016


Valach Motors VM 210B2-4T Mk.2 - new crankcase, fully encapsulated valve train

Like on the VM 120 B2-4T, the valve train of the new VM 210 B2-4T Mk.2 is fully encapsulated, improving rocker arm lubrication and the valve train runs quieter. The crankcase of the VM 210 B2-4T Mk.2 is manufactured from solid aluminum and guarantees highest strength with a low weight.


The VM 210 B2-4T has been projected together with the VM 170 B2-4T, sharing the same crankcase, pistons and cylinder heads. A new, longer stroke crankshaft, longer cylinders and new steel connecting rods are responsible for the increased stroke, more torque and significantly more power output.

Just like the VM 170 B2-4T Mk.2 the VM 210 B2-4T Mk.2 is an exceptionally smooth running engine. The immediate and smooth reaction to the throttle, without the slightest surge, makes the VM 210 a first class power plant, not only for glider towing, but aerobatic models up to 25 kg AUW, without a noise problem, with well over 30 kp static thrust to catapult the model into the air. Once there was an advertisement by Curtis Pitts with the headline "going up in style", this describes very well the experience when flying my big Pitts with the 210B2-4T Mk.2.

Being a four stroke with a large capacity of 105cc per cylinder, causes a very realistic full-size aircraft sound. If required, even with a relatively small silencer the sound level is very low, rather like a small saloon car.

The Valach 210B2-4T Mk.2 is a four stroke OHV engine running on petrol/oil mixture. Valves and their seats are manufactured by Honda, ensuring a very high quality. The completely enclosed valve train reduces sound, as well as ensuring the rocker arms are well lubricated. Due to the steel cylinder liners this engine will have a long life.


Valach Motors VM210B2-4T Mk.2 rear view

Rear view of the new VM 210 B2-4T Mk.2.


The processor controlled ignition allows easy starting and a exceptionally smooth running in all throttle settings.

The recommended RPM range for the VM-210 on the ground is 4,400-5,000. Depending on the silencer, we have measured on the ground with the 36x14" Fiala propeller 4500-4800 RPM.

For the VM 210B2-4T Mk.2 installed in the Pitts Special S1-S, we use the Fiala 36x14" as this has proven to be ideal.

At 4800 RPM with the silencer #7293 we measured 35 kp static thrust. With the 2 in 1 silencer #7290 the VM 210 turns the 36x14" Fiala with 4500 RPM.

We had tried many oils, but recommend Valvoline SynPower 2T oil. Our BEL-RAY H1R although excellent for two strokes, is not ideal for four strokes, as it burns very well without deposit and not much gets past the piston, as is the case by the Valvoline SynPower 2T.

We recommend Aral Ultimate 102, as the smell is not so penetrating and it can be stored without deteriorating. It does not contain any ethanol.

The fuel consumption is approximately 50% compared to that of a two-stroke engine with the same displacement. A 1000 cc fuel tank lasts for about 15-20 minutes of flying time.