After a great crossing of 20 hours with the luxury ferry of the Colorline you will moor around 10:00 in the port of Oslo. So you can start the journey rested. After disembarkation you are soon on the main road and through a number of tunnels you are already out of the city before you know it.
In Norway, the main roads around Oslo are all toll roads, which were still toll-free for motorcyclists until 2019. If you are by car, you will be registered via automatic toll gates with license plate registration and after a few weeks or months, sometimes not at all, you will receive the bill at home. The costs are generally not too bad. Oslo city is certainly a city where you can stay for several days, given the old town and the various museums. Feel free to plan a few extra days here at the start or end of your tour.

After about 25 kilometers the road branches off to the south and we drive parallel to the river Nitelva. These are the last kilometers of the 37 kilometer long Nitelva, which then flows into the Glomma. This changes into a large lake called Oyeren and later you will pass the Glomma again. The river used to be used to transport logs to the sea.
After the bridge over the Glomma, there is a spacious parking lot by the river to take a break and take a look at the old bridge (Old Fossum Bru). Here are also defenses from the 2nd World War. There is also an opportunity for a cup of coffee at the parking lot.

After about 100 km you can visit the monumental church in Eidsberg. This is a 13th century church and is one of the oldest stone churches in Sweden. If the church is not open, the caretaker lives diagonally opposite and will gladly open the door for you with an old-fashioned key of 30CM long.
A little further on, before the town of Mysen, you come to the small open-air museum Folkenborg. See the link below the text for more information. The many (small) museums in Sweden and Norway are indicated by the ⌘ Looped square symbol on white signposts with brown print. Shortly after the Folkenborg museum, the route through Mysen passes a kiosk with a terrace to possibly have lunch or do some shopping for it.
The height differences in the landscape are not spectacular but enough to encounter a waterfall every now and then.
You will pass the Susebakkefossen where an old hydroelectric power station is located. There is room across the bridge to stop for a photo opportunity.
Upon entering Orje you pass an old lock complex in the Halden canal.
This is well worth a walk around and for a viewing. Here is also a museum about the history of the Halden Canal.
You pass the border between Norway and Sweden and continue between lakes and forests to the town of Arjang. There is a large statue of a troll in a parking lot.

The last part you drive through the province of Varmland to the final destination Karlstad. Varmland is one of the most beautiful nature reserves in Sweden. The beautiful nature makes your motorcycle holiday complete. The landscape of Varmland is very diverse: lakes, rivers, heather and swamps alternate with forests and green hills. More than 2/3 of Varmland consists of forests. There are more than 10,000 lakes in the area and these naturally characterize the landscape. Bears, lynxes, wolves and moose live in the many forests. So you have to watch out.

The locations to eat or drink something along the way are limited. You will often have to drive to a village center for food and drinks. At Sanda there is a campsite on the route on the water with a kiosk and terrace. Here it is pleasant to stay for a short break.
When entering Karlstad, the route goes along the Circle K to refuel so that you can immediately move forward the next day.
For camping enthusiasts, 2 poi's have also been added from campsites in the woods and on the waterfront in front of Karlstad.