Karrtoon

Looking to replace my sprockets and chain as they are old and need replacing as the chain is knackered. So I was wondering if anyone knows the original sprocket sizes for the 07 model. Any help would be greatly appreciated!

The speedo on my XT125x (2007) has stopped working, it will flash between saying enduro and motard even when the ignition is off. When I try to select one of the two options it simply flashes the next screen and returns to saying enduro and motard. Has anyone else had this problem? Sadly I'm no longer under warranty and was quoted £160 for a new speedo from a Yamaha dealer so if the problem is the actual speedo I'd like to be certain before I go and spend the money. Many thanks.