As far as setup and running goes...the YS engines are a little more complicated to setup. They work differently than normal engines. The pressure system and the super charger are what make them what they are. Its just a different learning curve is all it is. Some guys understand what they are doing and making the changes are easy. Other guys are just turning the screws and they are the ones that have trouble. I try to explain what the symptom is and why the result is what it is...This way if something similar happens you know what to look for. Its not always the same smoking gun...but if you know its an air leak...then you can address the specific areas that could be the cause. Once you understand how things are working its usually pretty easy to see the solution or fix a problem.


YS engines are high performance machines. As such they can be a little temperamental if they are setup correctly. Once you have them correct its rare to touch them and they just run and run.

Cube for Cube they are the most powerful engines out there. Even against the 2 strokes. I personally the think the 1.20 two strokes and the YS 110 are comparable power wise. The YS 110 has a bit of an edge power wise on the saito 125.

As for the the Glow plugs the OS #F and the YS plugs are the exact same plug OS makes them for YS. These are the only plugs to use...this takes the guess work out of it.

The instructions are pretty good with the engine, and if you have questions we'll be happy to help you out.

good luck with it. One quick note on the usual first beginner mistake DON"T use any of those fuel filler valves. The ones with the probes that the probe inserted means it flow tot he tank and with the probe removed it flows tot he engine. They do not seal well enough. This combined with the YS pressure system of about 6-8-10psi in the tank...these little valves will leak I promise. This is why to use "T"s and fuel dots. Then its a closed system. Next thing always remember to release the pressure in the tank first before you try to fuel the tank back up. YOU will out of habit pull the fuel dot or the supply line off first. I can warn you 100 times and you will still do it. We have all done it. With 8psi in the tank it will shoot the fuel about 10ft away. So get ready to apologize tot he buddy pitted next to you the first time....It will happen.

Troy Newman
Team YS