The Honda PCX / Forza / ADV150 / SH Forums

Pcxdemon wrote:Must get 150 head too ideally, it has bigger valves and ports. Deff more power and less chance from overheating. Also get yourself forza 35mm TB its awesome and its a straight fit. If you chose to keep 125 head, then you must do this...In the maddies photos above you will see a photo of a 125 head water ports with a 170 head gasket aligned on the head. You will also see that the 170 or for that matter 164cc cylinder ports from the head gasket don't align properly with 125 water ports. Do the same mock up and then use a black marker and colour in the metal on the 125 head water port that doesn't align any more. After that use either a dremel tool or a small file and process those ports biggest to align properly with the head gasket. Its very easy to do. After that you shouldn't have any more troubles with overheating. Also Install the plug Yuminashi specifies as that will actually run your motor few degrees cooler. I know as i have water temp meter and it clearly shows the difference.