EAT288 are made by Denso (formly known as NipponDenso) and have the NipponDenso / Sumitomo type connector.
The ECU is by Denso so makes sense.
They are not Keihin because they would have the small K logo and different part# on body as I have seen on some 636s.
The bigger bikes have primary and secondary injectors also.
The code on my EX250K EAT288 injectors is 288086C from a 2009.
I'll have to check the other throttle bodies I have.
Looking at other similar EAT28x, and many EAT2xx, injectors and what others infer, the 28807ZF can be read to 288 07 zF where 07 might be year of production and the last two are the batch?
288 must be for nozzle design, hole count, flow, etc... and refers to the part number EAT288.
Everything I know so far:
INP-288, Kawasaki part# 49033-0013 NOZZLE-INJECTION, Denso part# EAT288
Connector: Nippon Denso style / Sumitomo? type connector
Body Color: Dark Green
Markings (stamped by connector pins): LICENSE BOSCH
High Impedance
8 hole, 60 micron atomization droplet size
200cc/min @ 43 PSI (reported in this thread)
28806YJ, 2007 ZX600P7F ZX-6R
288071S
2880725
28807ZF, B3, 2008 EX250K (greg737)
288086C, B7, 2009 EX250K (mine)