Track Day Winner
Join Date: Oct 2012
Location: south africa
Motorcycle: gsxr750 k7 gsxr1000k8 triumph675 triumph955i
Re: Clanking sound, coolant in oil.
hi there bud sounds like a big problem, from what you wrote id take it in, see a noise like that means trouble, plus coolant mixing never a good sign, blown head gasket maybe, as for the sound could be a bearing gone....
easy way to check would be drain oil check for copper pieces/shavings, thats bearings if not could be a head problem best is to get it checked.
if you no your way around the bike you could pull the sump n check, and check the valve clearance for a bent valve i hope this helps good luck