Thanks for the reply guys. The bike has done 37k miles. I couldnt find a surface temperature gauge anywhere for under £100 so I just disassembled the whole cooling system, shearing a bolt on the metal piping just below the rad. Anyway, flushed the radiator and backflushed it. Put it all back together and it looks good so far. For 30 mins at idle temperature stayed at 1/2 way, when it passed this the fan kicked in and brought it back to 1/2 just like before.

I jumped on to take it for a spin and ran out of petrol somewhere remote. Good news is she never overheated. I'll try again this evening.

P.S. Thanks for all the help so far guys.

 

Good to hear. Hope it stays that way. Should be up you end of the world in sept, and plan on bringing the bike. Will let you know and maybe meet?

 

Sure Collector, sounds good m8. The CBR is running fine again. She is on EBay now as I grabbed a GSXR 1k cheap. By all means give me a shout when you head up this end.

 

I'll pm you my mob number