Hello everyone, just recently I became the owner of a Honda CB 1300 from 2003. I am preparing the bike for complete control in preparation for the summer season. The bike has 50000km and I don't know what type of oil has been used to date on this bike. For this model Honda recommends a 10w40 oil but as I live in Sicily where temperatures above 40Â°C are easily reached in summer. I don't know the lubrication system and the mechanical tolerances of the bearings of the CB 1300 and my goal is to best preserve this fantastic engine (I love this engine). I ask you if you think a 10W60 oil can create problems or excessive wear to this engine. In my area the most used and easily available oils are Motul 7100 10W50-10W60, Petronas Sprinta 10W50, Bardahl XTS 10W50-10W60, Silkolene Pro 4 XP 10W50-10W60. What do you recommend? Thanks in advance for the advice you want to offer me.