Does Syria charge $450 to go through?

[Darwin]

Hi,
I'm planning a trip from Kuwait > UK.

I'll buy a bike in Kuwait, then do the paperwork for Export, and take it overland to the UK.

My question is this:

I've read in this forum that in Syria, they charge $450 if you're taking an export vehicle through; even if it's only 12 hours or whatever. Is this correct?

My other option is to go through Iran > Turkey. But given the altitude and mountainous terrain, this would have to wait till early summer.

I'm assuming the Iranians don't impose such hefty fees (if any) for taking an export bike across.

Thanks.