I have unique 70cc, its been a month now i am feeling my engine is getting over heated. showed to the mechanic he said head is ok, tapid are working fine. we will have to open head to check piston/ring. i want to ask if anyone have idea about what is causing the over heating.
I called my friend and showed him the bike, he said problem is with carburetor, head and carburetor are not matching. You rejetted it in hot weather it was fine as now weather is cold its not matching with head and causing heating. On other hand head is also weak and losing its performance.
His advice is not to do anything and run it till it completely goes down then repair complete engine at zero with new piston, new head and carb.
1 question do hot/cold weather matter's?
Your friend is wrong hot or cold weather it does matter much for carb to head fitting