SE Racing P.K. Ripper frame ID breakdown
'79-'84 = Loop tail
'85 on = built in seat clamp, non loop tail mid
'85 = straight chain stays (only one year before the change)
'86 on = curved chain stays
'87-'92 = lower Pitbull brake mount with lower brake cable guides
'93 only = upper and lower brake cable guides
'94 on = canti or v brake mounts
'95 on = 1 1/8 threadless stem/headset
'98 on = 'SE' downtube decal instead of 'P.K. Ripper'
'99 = last year for US made products before sale to Another company.