All 2st Wheres This Leak Coming From

Its not low of coolant, the clamps are on good, I cant see any cracks in the hose.....I am sooo confused.

Is it spooge from the power valve cover? There isn't much that gets down there but it can leak.

I'm no expert, and at the risk of sounding a little strange, when I see a leak like that in my bike or car (that I am concerned about) I drag my finger through it and smell it.
Usually gives me a pretty good clue as to the kind of fluid I am dealing with. I guess I'm just weird that way.

Coolant hose. I had same thing on mine. I tried sanding the casting and had the clamp really tight, but it wouldn't stop until I replaced the hose.

I had the same with mine the casting has a ridge mark which prevents the hose from clamping down properly. Sanding smooth helps to elimate the problem. It seems to be very common I have checked many 250s and 300 in the dealers, most of them are leaking to a greater or lesser extent.

Just a thought, I put a zip tie around the down tube on the frame to hold the wires and got it around the over flow hose for the radiator. Just had put the motor back together so naturally thought I had a made a mistake on the re-assembly. The zip tie was enough to let it force the coolant out somewhere else. Thankfully figured it out before tearing it back down. Just say'in

How do you like the Magura clutch?

Flat out orgasmic. Single best upgrade I could make besides keihin and motosportz dampiner.
I have a finger on the clutch constantly so arm pump "was" an issue but no longer.

Wasnt there an aftermkt hose kit advertised for the 300 here at some point? I wouldnt mind taking this oppurtunity and upgrading these cheapy things.

I think it was DRC silicone hoses. they looked sweet too

I roll the other way. When I see a leak I start loading it up with grease and gunk in hopes it stops the leak

I wouldn't even try to fix that leak. These bikes dont even need coolant. I've done the research

Funny you say that....my friend who has a 10 ktm300 lectured me about getting an overflow tank for the radiator cus of all the switchbacks we ride. I just smiled and xplained that this bike dont need it. I have sen several posts over a couple yrs here where someone lostt a radiator or whatever and bike ran just fine.

Yeah, I remember motosapians talking about losing his coolant on a renegade ride and he had no issues. That made me feel better about climbing my bike to 11k ft on a bone dry radiator last August.
Oops....