Hi i have a yamaha dt 125 lc 1982,
The engine has just been totally rebuilt, i got it back yesterday and put it in today but its over heating, the needle just sits by the h red mark but it does go on the red same times but the engine doesnt feel that hot when i undo the radiator cap, i can see the water pump flowing the water through the top of the rad so it cant be that
The engine has a 180cc big bore kit on it but all the sensors are all the same from a 125
While the engine was gone i had another engine and that was doing the same thing, iv changed the rad and it stil does it..!
I cant work it out any help will be great
Thanks