Be warned - a shipping agent makes his money from shipping your cargo. He doesn't suffer at all if you can't drive it at the other end, in fact he can charge you more to try and sort it out. Worth remembering that in a way he'll tell you anything to get his sale commission.

Unless you know for certain that you can customs clear and ride a motorbike in Saudi then I'd treat his advice along those lines. You may well end up in Saudi with your bike in the port and no way to get it out, or if your successful with that, no way to drive it in Saudi, you need the correct paperwork for all of the checkpoints, so you'll have to stick it on the back of a truck and pay to be drive to your exit point, aka a RHD drive car.

At the Saudi embassy in Khartoum they assured me many times I could drive a RHD in Saudi, but in the port in Jeddah it was very firmly a no go, I spend two nights sleeping on a park bench outside customs politely trying, and but for a slice of bad luck would have wriggled my way into doing it :-)

I know some motorcyclists had snuck through after a similar tactic a few weeks before, but that was on a technicality that was closed afterwards.

So unless you can find some recent blog posts of foreigners (I'd take that as non-Muslims btw) then I'd say it's not possible.... (if you do, please post them here...)

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Kiwi, 7 years around Africa. Overlanding channel:https://www.youtube.com/c/roamingyak