Hi,
I did it this summer. We were 4, me and 3 russian guys I met by chance in Magadan. We started in Magadan. We left Kadykchan around 5pm when we started the route and had to camp twice before reaching Tomtor in the evening.
We were not fast, we drown 2 bikes and had a clutch issue on the 3rd one. The guys with me needed an enormous time to pack their stuff in the morning ,and were taking smoke breaks quite often. We were really lucky with the weather, no rain, the rivers were not high.
I spent one week in Magadan waiting for the weather to improve.
It's very unpredictable, every year can be different. I know people there which whom I have often contact.
After us, the was another group of irish (the BAM riders)/english/german, 5 bikes and 1 landcruiser. They managed as well.
I heard about a group of kiwis that did it in late august. They sent a bunch of 250 Yamaha's to Yakutsk by plane and they had a truck following to carry the bikes during the river crossing. According to the information I had, they had to load the bikes in the trucks for most of the crossing, water was already too high.
There were 2 Chinese guys as well, they hired a truck driver but they couldn't make it and had to go back, water was too high even for the trucks.
So I would say that the most important factor to ride the OSR is.... LUCK
It was my second attempt, first attempt in 2014, mid August (same year as Lyndon did it), was out of question, there was even flooding on the new federal road, we were stuck 2 days in Ust Nera. When Lyndon did it, according to the videos I've seen, most people wouldn't make it. Already the first river was too deep for most motorcycle. Him and Lukas had Rally Replica, with the super high air intake, and don't forget that they are exceptional riders.
I would not go alone on the OSR. Some have done it, we found a kawasaki GPZ 140km from Tomtor, stuck in mud. The guy walked the 90km to the road near kadykchan and hitchhiked to magadan... but that's crazy...WE had many situations were we needed to help each other. One of the guys felt down during half of the river crossing, and we were often stuck in bogs.
Absolutely no one goes there! We were first this year and there was no tracks of cars or truck up to 80km before Tomtor.
You can read my detailed report and see the pictures on my blog here:
www.facebook.com/zimiontheloose
In the january 2017 issue of Adventure Bike Rider magasine (UK), you can ready a short very of my story as well.
About the route, starting from Kadykchan, the first part is ok, the first river crossing was the most difficult. Then until the hunters camp it's easy. It start then to get harder up to approx 140km from tomtor. The last 100km, the track is quiet good, no bogs (when we were) and several river crossing, but not that bad.
The second half from Tomtor to the federal road is now a piece of cake. There are only 2 river crossing left, one of them was a little bit tricky.