My rackets are generally 100g total weight for 3U. So a 97.7g 4U TK6000 makes sense since it still has the plastic wrap on the handle which is probably ~1g, so my 4U would be about 96.7g. I use the full length of G09 RKEP along with the grip tape.
My 4U TK6000 measured 41g head weight strung with the head on the scale and the handle's edge approximately 1 inch off the table. For reference my friend's 3U VTZF bought in Beijing measured 45.3g strung head weight, but he doesn't use RKEP grips. My VT80PG measured 44.2g strung head weight and with RKEP G09.
Haha, now I have JJS too! Haven't played yet, but some first impressions: feels much head-lighter than my li-nings ) Definitely a bit head-lighter than BSLYD.
Wet BP (strung with NS95 and with 0.6 overgrip) is 296mm.
The racket is rather stiff, maybe a bit stiffer than BSLYD.
Swings fast, feels quite good, should be excellent for my doubles game.