See if the manufacturer has any information on their website. Mostly I see 100 dry miles as the distance. From Avon webste

Yes, when new m/c tyres are fitted, they should not be subjected to maximum power until a reasonable 'running in' distance has been covered. 100 dry miles (160km) is the recommended minimum (discount any wet miles covered). Tyre should then be visually examined and their inflation pressure re-checked before riding.