Super strong two stroke 90ccm class gas engine with procesor controlled ignition unit.
This engine is based on famous 90RV-J/180B2RV-J family , but it has many changes:

CNC milled crankcase bringing more rigid core of the engine and lowering vibrations.  

CNC milled backplate, 

strengthened crankshaft,

redesigned piston and cylinder

ZDZ 97RV-JCH brings the best power you can get in its class and very easily can replace any 120ccm boxer while saving weight on engine as well as on exhaust system. 

This way your plane will have very light weight and powerfull beaast under cowl. 

 

Fuel intake of this engine is managed by rotary valve which contrary to the usual reed valve system allows much more precise controll over the timing and same time brings much longer lifetime without need to change reed valves.

 

 

 

 

HERE you can download 97RV-J (ENGINE WITHOUT STARTER)  3D PDF file where you can play with 3D model and measure whatever dimmension you would need. 

 

 

 

 

 

 

Here you can download PDF with backplate installation pattern. 

Displacement:	97 ccm
Weight:	2190g (3380g with electric starter)
Bore:	52 mm
Stroke:	46 mm
RPM range:	1000-8500RPM
Ignition unit:	Processor controlled 4,8-7V
Fuel mixture(N95+oil):	1:40
Recommended twinblade propellers:	27x12, 28x10, 28x12
Recommended three blade propellers:	25x12, 26x12

 PDF file with ZDZ 97RV-J installation dimmensions.