Sounds like you are more into racing rather than enjoying the trail. Wanting more than 70mph on a trail? That's crazy! You remind me of the teen kid on a dirt bike trail up in Wayne NF. Came around a curve fast and dumped the bike to avoid me, he wasn't expecting anyone else on the trail. Twisted his ankle and minor damage to the bike. His dad arrived and said "I keep telling him to slow down but he won't listen."
It reminds me of this kid that had one of them tall mighty Brute Forces with tons of suspension, following me on my little Honda Rubicon 500 along a steep side slope trail repairing a fence line. I heard this ruckus and looked back to see the super unstable mighty beast rolling down the slope. Glad I was carrying the posts and barbed wire.