As a grown-up who is reasonably good with his hands I am embarrassed to raise this matter but I would appreciate some views on why my front tyre keeps losing pressure. Around 10 PSI in 10 days. The bike is a 2000 Hornet 600. The speedo claims only 35,500. The tyre is tubeless and appears to be in good shape. The rim seems to be undamaged. The valve is in snugly; there are no bubbles when I put a bit of spit on it. It should be simple, but I cannot find the prob.