the tyres fitted are marked not for highway service and i can‘t find any legal motorcycle tyres in these sizes anywhere in the uk tyres fitted are zhong ya 207x40x14 which measures 180 not 207 and 70/70x15 front tyre
The only thing that matter, IMO, is the rim size. Changing the Width and Profile a little typically don't upset the suspension too much. So, you do need the 14 and 15, but the rest you can get a couple number off. Maybe a 210/35x14 or a 65/65x15 ? Look at Cheng Shin Trials tires. They're DOT legal and have great stickiness and water repelling.
