In the 1986 to 1993 the Kawasaki Spec is 355 mm / 13.97" with the fork extended, spring removed.
In the 1994 to 2007 the Kawasaki Spec is 171 mm / 6.73" with the fork compressed, spring removed.
NOTE: The earlier specs were done with the fork extended because of the location of the "crossover tube".
ie; At 355mm / 13.97" the crossover is above the oil level.
I've found that the later model {1994 to 2007} Kawasaki Spec works fine on all models and is easier to measure.
Because (at 171 mm / 6.73") the crossover is below the oil level, it will allow oil to flow between the 2 tubes as you set the level.
To overcome the issue. Allow the oil time to settle after you set each fork, and then re-check the level a second time.
(As Mercer said) RaceTech uses the Later model method to service the forks.
Using that method, they decreased the Oil Level from 171 mm / 6.73" to 150 mm / 5.90" with the fork compressed, spring removed.
(The Oil Level is higher to prevent Brake Dive).
If you prefer to use the earlier method, (My guess is) the (Race tech) oil level would be 334 mm/ 13.15" with the fork extended, spring removed.
I suggest (after servicing) you confirm the Oil Level is approx. 150 mm / 5.90" with the fork compressed, spring removed.
Ride safe, Ted