Originally Posted by DaveInDenver
The 4-digit (e.g. XXYY, week/year) date coding didn't start until 2000. Before that it was two digits for week and a year digit, so 33rd week of probably 1993.
So then, if these don't have the 4-digit code, then they're older than 2000? which means probably too old to run.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 06 TW200, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50