Hi

My bike had been laid up for several months and I took her for her annual test last week, ironically I was musing to myself how little trouble she has been so far.. just a water pump seal last year. During the test she was idled for a while and afterwards she was left to sit. After chatting with the guys I went to leave and noticed coolant had leaked down the oil tank and the radiator hose above it looked damp. I rode her home and it didn't look much worse. Took her out for a couple of hours ride yesterday and it seemed OK other than what looks to be "sweating" from the strings in the hose. I've read both negative and positive reports on OEM hoses, mine bike has low mileage (15k miles) and the coolant was changed along with the water pump seal last year, by me.

I don't know if this sweating is just coolant that had tracked back into the hose from the original leak or if the hose has become porous inside, I guess I'll monitor it over the next few rides.

If it is actually doing this is it ok to ignore it or should I be looking at changing all the hoses?

What do you think of these hoses on fleabay?
https://www.ebay.co.uk/itm/KTM-950-990- ... VFWiAGFXvg

Should I go for white hoses? (I am tempted by them

I had the same if not a similar problem. Most of the issue is caused by the crappy OEM Spring type clamp. It occurred just after a service and I couldn't get it to stop no matter where I positioned the hose and clamp.
I instead put on screw type clamps and fitted a new OEM hose for the duration (until I can source some silicone hoses that aren't orange. AS3 havent had any in stock for ages).
Its been fine ever since viewtopic.php?f=5&t=27709&p=335609#p335609

Yes, your thread was one of the ones I looked at when I searched.
I'm gonna ride some more later this week and see if it leaks or 'sweats' from the strings anymore. If not then I'll just gradually ignore it.

If it doesn't leak again then, like you did, I'll try a different style of clamp. I like the look of those crimp on style ones but fear that would mean disassembly to install them.

Yeah, while it was worrying initially, over a few rides I could tell it was a very slow leak luckily.
Its up to you, but you could easily swap out the clamp closest the radiator very easily (with minimal coolant loss).