The YS96 SRX Tareq engine has been a collaboration between YS Engines of Japan, and Tareq Alsaadi. Looking to further improve on the impressive performance of the YS 91 SRX, YS and Tareq spent many hours of R&D to bring the 96 to the table. With the co-op, YS has landed with the highest power 90 sized engine to date.
- Larger Cylinder Head for Improved Cooling
- Improved Porting of Sleeve
- Counterbalanced Crankshaft for Excellent Balance at all RPM's
- Proven pressurized regulator and fuel injection system for a superior throttle response
- Steel lined back plate to reduce drag for more power
Type: 2-stroke helicopter engine
Displacement: 0.96 cu. in. (15.75 cc)
Bore: 1.06 in (27.0mm)
Stroke: 1.08 in (27.5mm)
Total Weight: 19.5 oz (565 g)
RPM Range: 2,000–17,000
So, I’ve owned two of these motors. The first one I purchased was my first ys motor I ever owned after a OS 105 I had for years. The first problem is the manual gives needle settings that are way too lean for break in. The only safe break in settings on the ys 96 or 91 is 3 complete turns open from
Closed on both needles. After you get lucky enough to find that out life with these motors is much easier. The fist 96 I purchased and broke in as normal very rich and flew it for about a month maybe 3-4 gallons and the connection rod snapped on me and it’s fragments went thru the motor and fried the motor. I was def discouraged and I called that clown “space monkey” at ys and he pretty much offered no help and offered to rebuild the motor for a price. Bottom line with YS motors don’t expect any support like that. “Space monkey” is a Moron and your better off just learning how to rebuild your own motors. After this I decided to try again and just purchase another 96 new. I did so and the second one I owned did well and lasted me a full year before it needed a rebuild. In conclusion I surmise that the fist 96 I had was the result of bad factory QC and was just my luck of the draw. One key thing With ys motors are they will not handle a lean run as well as a OS will. A momentary lean run on a YS usually at the bare minimum requires a new piston ring and head gasket usually. Ring will be shinny and head gasket will have chunks missing. Other then all that this motor Pulled like a freight train and IMO ys motors (91 and 96) rock and will actually pull a bit harder then a 105 but you need to know how to tune and understand that they don’t like even the slightest learn run. If you buy one of these motors open both needles 3 turns for break in and tune it from there and don’t run it lean and it will run hard for a long time (as long as you got A Good connection rod!)
I ran a gallon through nice and rich to be safe (2.5 turns out from closed), and then leaned a few clicks after that to a slightly leaner tune to get temps up a touch. After several heat cycles, I was ready to rock. This thing is a power house, and I’ve had zero issues starting or otherwise. Tuning is pretty involved, so if you don’t know what you’re doing get someone that does to help out.
Don’t nuke your engine by leaning it out too much. If you do, please don’t blame the engine.