Seems like the same shocks as my buddies YFZ 1000 thingy.
Thing rode like dogshit. Fucking bucking everywhere. Gotta admit that golf cart had a decent amount of power for sure and would easily outrun the suspension ... but kind of a narrow peaky powerband.
Curious your end result. He def needs to tune his. And if his has these same shocks with weird internals... I wouldn't know where to start either!
mine is a 2016 . I put Eibach springs on it. still rode like crap most of the time. thought I had wasted money on the springs. decided to try a valving change on the rear. Thats when I found out haw messed up the shocks were. Each was about 2/3 full of oil , IFP was jammed tight into bottom of the res. , and ridiculous amounts of shims on compression. I decided that since I had to get into them I would start from scratch and use just standard FOX shim stacks. I put a 45 comp stack in front and and was impressed how much smoother it made it. 50/50 seemed good to start for the rear. Put those in and for the first time I could actually feel the rear move up and down.
My quest is to try and get it more compliant on stutter bumps in the front. If the bleed shim helps , I will do the same to rear if I can find the shims. From some of the comments on here , I guess 50/50 valving is the sign of a noob. Tomorrow rear gets changed to 50/40. Front is 45/30 plus the bleed shim added at bottom of compression stack.
Thursday / Friday going to see what I have . Will try a local area first and if that goes well , Johnson Valley
Sorry for being so long winded.