cluch slips

[xb12r05]

my cluch slips badly.went from being normal then got stuck in traffic jam got out of traffic to find not alot of grip still changes gears ok anyone have advice?

 

[MrOrange]

When was the last time that you changed your primary case oil? I was riding in Phoenix on a really hot day, all of a sudden my clutch started slipping. My XB9s had 2K on the oil, change it which made all the difference. Now I change the oil every 2K, never had a problem since.

 

[xb12r05]

changed primary case oil every 3k except last service was 4k and was warm day,sounds famillar. im lookin for new muffler box cause where had it stored at a mates car exsaust shop reckons he knows how to bla bla bla bla n puts a striat thru car muffler on i thought he knew wot he was doing,but the worst bit is he chopped up the stock one so if anyone out there have a stock one to get rid of give me buzz