99 YZ125 rear shock ?'s

My son's yz125 bounces pretty good in the rear. It has a stock spring and he weighs 150. I have the free sag at 30mm and his race sag is 98. When I have the bike off the stand I can bounce the rear really easily by hand.

Wondering if the shock needs rebuilt or if the spring might be just worn out?

Any help would be greatly appreciated.

Is there any oil on the shaft or at the base or on the bottom out cone?

I looked for that after he was done riding and I couldn't really see any. I'm going to check better tonight after work though. Obviously if there is I'll need a rebuild.

Thanks

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