The valve specs are 0.06-0.08 on the intake and 0.10-0.12 on the exhaust, the Speedo gear on that bike is prone to failure, so is the cable. The parts are different and the XF is F47A-17 and the XP is F47-17A….that would be 17”and 21” respectively.

Check the gear for smooth operation the speedometer should be accurate across all speeds if it is generous then it would be showing mph as it comes to a stop. Not spinning freely can cause false readings it has to be taken of and inspected.

If they are not accurate then it would be that the actual gauge is not metered to match it but it should be consistently off on all of them or it is then a mechanical failure and if its the gearing and or the cable it can be progressive and with variability.