Who can ID these pistons???

[focusinprogress]

I came into a huge stockpile of random vintage parts....found this pair of pistons of unknown origin....to me they look two-stroke, cast aluminum....

top has "1" and "0.50" stamped into it

Measures 60.4mm dia, assume this would mean a 61mm bore?

wrist pins are 16mm

Inside, one side is stamped "TJS" and the other "1197"

Would love to know what I have here....

 

[teazer]

0.5 and 1.0 are oversizes. They are 2 stroke pistons for sure but who know what for. Could be GT550 Suzuki but more likely a dirt bike single cylinder RM/CR/KY/YZ