Can I check my 2003 VMAX HPDI 250hp updates history?

[JourneyKim]

I bought Ranger 521VX with 2003 yamaha VMAX HPDI 250hp.
I live South Korea so I can't get updates history about my engine.
In this site, I found 4 updates for my engine.
I try to find in America's Most Diverse - Yamaha Motor Corporation, USA, Home with my engine serial number, but there's no place to check that.

How can I check my engine's update history?
I'm worry about blowing my powerhead.

Please give me some information.

[JourneyKim]

Serial Number

Here's my serial number :
VZ250TLRB
60X L 1000332

Please help me...

[seahorse5]

Any Yamaha dealer can look up your serial number on the factory's computer and tell you its warranty and required service bulletin history.

[JourneyKim]

Thank you for your reply.
Sadly, I can't speak english well.
So I need yamaha dealer's email address to ask engine's update history.
Do you know about that?
Thank you again.