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Aprilia RS 125 Tuono part 5 - Engine assembly
Servus and welcome to my new video.
In this part 5 its time to assemble the prepared parts of the ROTAX 122 engine. We start with changing all seals of the water pump assembly. Afterwards the gearbox is put in the engine case and the shift parts follow. Now you can see pretty well how the shifting mechanism works and I try to explain it.
With a new gasket the second engine half can be mounted and tightened down. OF course we test every function all the time because you never know. Before the cylinder foot gasket can go on, the big middle gasket needs to be cut flush with the engine.
After that is done the clutch and other small plastic gears can be mounted in the right order and according to markings. With a new oring on the oil pump and a new shaft seal the clutch cover goes on as well. Next are the piston, cylinder and cylinder head. Every step is explained and shown in detail.
To run the machine you need electrical power so we mount the alternator. One of the last steps is to completely disassemble the power valve, clean it and throw it together with new seals and o-rings. It is very important that this part works correctly so we pay attention to it.
And because it is easy to reach at this point the last part is the sprocket.
At age 15 I bought a Honda NSR 125 - A very good bike, had a ton of fun with it. But like everybody in that age I always wanted a Aprila RS, because its the most powerful 125 2 stroke. But the prizes were higher and the cost for maintenance is also much higher, so I could not afford one.
More than 10 years later I had the chance to buy this RS cheap and now I have the skills to completely repair it.
I hope you enjoy my video and it helps you to repair your own stuff - because thats my intention!
Thank you for watching