Yesterday, i was driving on highway( about 30km trip), as i started to go out higway, sudently when i downshift to 3rd from 4 gear, Bike start to responding, luckly i was at end of highway.
I Heard one klicking noise coming from engine, i just let the bike go in neutral, until it was to stop. Call assistence and tow truck took bike to my garage.
Today i was in a hurry to see whats going on.
And What i found.... :(

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I dont know why it happened, but i could guess...I pushed engine a bit, i assume.

I'm now woundering how i wil solve it.
I have technical and pratice, since i'm studying to be motorcycle mechanical. Last month i have opened more than 10 engines. LOL (So at least i wil not pay to someone repair)
Now i have do figure it out what its the cheapest way to solve it since im jobless at moment.

Far as i know, i need(need to open all engine to confirm ):
Head(that one has no repair)
Valves
Piston/rings
Cylinder(since wil change piston, better do to) But mine looking good.

This week i wil confirm if gear box was not affected buy piston pieces, or valves remains.


So i'm open to sugestions, starting from rebuild, or just engine swaping(like Gn250 swap)