Okay, so I got my hands on this 150cc 2-stroke engine. I’ve always been fascinated by these little powerhouses, the way they scream and deliver power is just insane. So, I decided it was time to get one and tinker around.

Getting Started
First things first, I found a used engine online. It was a bit rough around the edges, but the price was right. I picked it up and the real fun began! It was greasy, smelly, and everything I hoped for.
Tear Down Time
The next step, as for me, I took the whole thing apart. Unscrewed every bolt, took off the cylinder head, the piston, everything. I wanted to see the guts of this thing and figure out how it all worked. Plus, it was filthy, so a good cleaning was in order.
- Removed the carburetor – full of gunk.
- Took out the piston – some scoring, but nothing major.
- Pulled off the cylinder – needed a good honing.
Cleaning and Fixing
After I disassembled everything, i start to clean parts.I scrubbed everything down with degreaser and got all the old grime and carbon off. I spent hours making sure every part was spotless. It’s kind of therapeutic, you know? Seeing something go from grimy to gleaming is just satisfying.
Then I honed the cylinder to get rid of any imperfections, checked to make sure, and replaced the piston rings to make sure I had good compression. I also cleaned out the carburetor jets because they were totally clogged.

Putting It Back Together
After all the hard job, I had to reassembling. I reassembled the whole thing. This was the real test. Would it start? Would it even run?
I carefully put the piston back in, torqued the cylinder head bolts to the right spec, and reconnected everything else. It’s like building a puzzle, but with way higher stakes.
The Moment of Truth
Finally, time for the real moment, it was time to fire it up. I mixed up some fresh fuel, filled the tank, and gave the kickstarter a good, hard kick. Nothing. Another kick. Still nothing. I checked the spark plug, made sure it was getting fuel, and then… third kick, it roared to life!

That sound! That raw, two-stroke scream! It was music to my ears. I let it idle for a while, adjusted the carburetor, and then took it for a little spin. Man, the power delivery is crazy! It’s like a little rocket.
It was a total success! From a greasy pile of parts to a screaming, running engine. There’s nothing quite like the feeling of bringing something back to life like that. Now, onto the next project!