My dealer called and said he had opened the case up (where variator and clutch live) and found a leaking seal. He said there was oil on the belts and clutch assembly as well. Ordered some parts and hopefully I get her back next week). So far so good.
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Did you read the thread I posted?
I had EXACTLY the same issue. The mechanic ordered that very seal, replaced it and there was a leak again.
The problem was not in that seal, but in broken engine casing due to fabrication error. The oil was leaking inside the variator, over the seal, giving the impression that the shaft seal is leaking.
Everything ended after two months, a few more visits and replaced engine casing.
Advice: after he changes the seal, you should go to him again in 500-1000 kms to check the variator, and if there is again the leakage, print out my message and show it to him, along with the pictures of cracked casing I posted on the forum.
Kymco has accepted all parts and work related costs without hesitation.
I hope it will work in the best possible way for you...