As far as Dutch traffic laws dictate:
License plate on the back is obligatory.
Make sure you have (and use!) an approved safety helmet.
Lights always on.
In stalling traffic on the freeway, you may pass cars between the left lane and the lane just right to it. Note that this is not a law, it is tolerated as long as the speed difference with other traffic is not exceeding, say, 20 km/h. If someone switches lanes and hits you, it's your fault.

Have a read of this
http://ec.europa.eu/transport/road_safety/going_abroad/index_en.htm

I also wonder about your license. I have read that there is a pretty stringent exam to get one in France, for example. Just a thought.

A US license should be enough to drive around most parts of Europe. You don't need to take a French exam to drive in France if you've got a US driver's license...

Three months may be OK--more maybe not without approval? Also may need to check on the French customs requirements of shipping the bike.
http://ambafrance-us.org/spip.php?article376

For 3 or 4 months a drivers license is not a problem.

Here's a site with info...

http://micapeak.com/~marcl/pages/shipbike.html

Much of the info is nearly 2 decades old but if you scroll down
you'll find an entry from 2004 describing the process and costs in detail. It's easier than I would have thought but the key seems to be you must have a European Insurance green card in hand before you can take the bike out of customs in Europe.

Get used to the idea of riding into cities... parking out in the periphery will be a major hassle... if you can ride a bike at home you can ride a bike in Europe.

three months will be OK. Four months probably not. You are only allowed to be in Schengen for 90 days w/i any 6 month period. spending 30 days in one of the non-schengen countries is possible -- but that is really only Bulgaria, Romania, or the UK/Ireland.

Insurance could be a problem. You have to have third party insurance minimum to drive in Europe.
You will need an international drivers permit if you go to some countries such as Italy. Get one fro the AAA and make sure it says you are licensed for a motorbike - it is a separate licence in Europe, don't know about the US.

Check on Schengen rules so as not to over stay your 3 month visa free period in Schengen countries. Not all European Union countries are in Schengen and some non EU countries are.

Make sure you have good locks for your bike!