Piston clearances?

Is there any Husqvarna motorcycle specs listed for piston clearances?

Old pistons from back in the day, yes. Modern pistons are slightly different. Go by the piston manufacturers specified clearance ...... it's on the box !

As grouty said, it depends on the piston, they all have specs in/on the box.

There are also clearance differences between cast and forged pistons. My father found out the expensive way back in 1973 when he replaced the piston in his 72 Puch 175. He had it bored to the Puch specs with a Wiseco replacement. He seized 2 pistons before he called Wiseco and was told the stock piston was cast and the Wiseco piston because it was forged require more clearance than OEM specs. They did not put the clearances in the box back then,

Slack is always better than tight! Don't forget - when they are worn out it is is usually by .2-.3mm worn, so an extra 10 microns wont make a lot of difference....

Andy