IACV explained

[max]

Can someone tell me the part number of this very expensive IACV, please?

If it's just the item Max posted a picture of in #1 of this thread, it's surely not US$1,600. That would buy you pretty much the core of a new throttle body, wouldn't it? Or is the point that you have to replace the entire throttle body?

Here you go sir, courtesy of sportsterdoc;
http://www.2wheelpros.com/oem-parts/2014...mbly.html#

It is item # 4 motor assembly. The IACV is 16430-MJF-D01
i also believe there is a later version which is more expensive

According to what i have heard honda only sells the entire throttle body as a spare part hence the hefty price tag.