用手掌大的平木頭包起320號沙紙，從左到右，從上到下，來回磨，最後用上1000號沙紙細磨

所有跟帖： 

• this is why it stil overheating, the head is wraped, sand it thi -yyang3- ♂ (0 bytes) () 01/12/2019 postreply 12:59:35

• need cylinder head resurfacing -yyang3- ♂ (0 bytes) () 01/12/2019 postreply 13:00:24

• But it dose not have any check engine on . No misfire . And ru -motorcycle- ♂ (0 bytes) () 01/12/2019 postreply 14:37:12