Have riden the big Loop several times and am now looking on a map that indicates a road running west from Khun Yuam over the mountain (Route 1263). There's a T-Junction with Route 1088 which runs North/South. And here is where I need some help: My map shows a non numbered road in small line over the big mountain (Doi Inthanon) to Samoeng. Is this road viable for a 400cc Honda Steed? (Or any bike for that matter). -When You Come to a Fork in the Road, Take It.