The cursory of 6 days for North center:
Day 1: Hanoi - Moc chau plateau: light offroad in Old national road number 6 (40km)
Day 2: Moc chau - Ta so - Yen Chau - Son La (50km dirt road or 80km - depends your time) - Bac Yen
Day 3: Bac Yen - Tram Tau - Nghia Lo - Tu Le - Mu Cang Chai (20km dirt road)
Day 4: Mu Cang Chai - Muong La (100km dirt road - cross jungle, river, rock, mud...)
Day 5: Muong La - Sapa
Day 6: Sapa - catch overnight train to Hanoi.
It's one of extreme hard trips for you. I provide this for riding experts who come with high require of dirt road.
LastWalkman screwed with this post 04-11-2013 at 02:38 AM