CG Road to 250CC

[ego]

Hello Folks

After following, reading around the forum, I decided to create this thread in order to benefit from your useful advices.

So, a few months ago, I just bought my first chinese cg clone. Did a few customizations on it matching my favor “cafe racer/scrambler look”.

Here you got some photos of it.
https://photos.app.goo.gl/TDpf1RcSpMT71uHJ6

It is based on a Loncin block 125cc. As I know, the cylinder length is 69mm. I don’t really know the wight but the piston pin is 15mm.

My plan is to bore it up to 67mm on stock block. I found a 250cc head and a piston, cylinder set 67mm with 69mm length. Can I get this work on my stock crank? Will it handle it? Did some research but wasn’t able to find examples like that. What do you guys think would this be lasting on stock block? What do I have to upgrade next to make it safe? What size of carb would feed it?

Thanks in advance for your help.

Ride safe
ego