Specification:
- Displacement: 43 cm3
- Bore / Stroke: 38 / 38 mm
- Power Output: 5,2 PS/6200 ot./min.
- Weight Without Ignition: 1360 g
- Ignition: electronic, microprocessor
- Ignition Weight: 185 g
- Carburetor: Walbro

MVVS 45 IRS is technical and technological improvement MVVS 58 conception. This engine is equipped by latest scavenging system used for model engines. Absolutely upheaval is serial usage of magnesium crankcase's castings. Thanks to this fact is MVVS 45 weight comparable to the lightest 40´s and performance on propeller to other 60´s engines. Intake is controlled by reed valve placed in rear cover. Exhaust system is orientated on the right side. Crankshaft fitted on 3 ball bearing and connecting rod has both holes equipped with needle bearings INA. Piston is made from aluminum composition with high contend of silicium. Piston is coated by special sliding coat, which force running in the engine and extend engine service life. Cylinder from aluminum composition has working area coated by NIKASIL. Engine is suitable for all kind of models and also has good exploitation for racing acrobatic flight.