Sorting and reorganizing photos on my PC... Came across some good memories and lessons.
This project was put to the way side some years ago after the piston went ker-pow(made it 2 years on that bore!) and I acquired my first Tecate. I learned a lot in those years. The majority of these alterations are not for the faint of heart, but are definitely for the empty pocket book!
On the left is a YT175 piston. On the right is a blaster. The YT has a taller dome and a thicker skirt. As you can see, The ports in the piston got opened up even more. Originally, they are smaller than the blaster. Those matched the cylinder somewhat. I didn't have the correct piston rings. I had 1 size over the piston i was using. The rings got ground down and clearanced until it met the specs from the book. This is what i believe was the downfall. The cylinder is now egged and will need bored to get it round again. My guess is the rings had to much pressure and caused it to wear faster.
2nd port job. Looking at the pictures, so much left to be desired. I have the original cylinder somewhere. I should have taken pictures of the finished results. These really make it look bad. It was cleaned up so much more than this. The intake was still to restrictive for exhaust ports that big! Upping the compression helped mitigate this quite a bit. We did weld up a few parts just to get the holes bigger.
Force fitting blaster reeds with a nasty reed spacer. All covered in honda-bond. No leaks!
My arc welded pipe. It was the fastest ugly pipe i ever seen!!! lol
I couldn't find pictures of the cylinder head. After cutting what I think was ~ 50 thousands off, compression went from 95 psi to 145 psi. This made a huge jump in power. Then the piston went pow. lol
Reply With Quote