206 mph (331 km/h) and beyond! achievement in TT Isle of Man Ride on the Edge

Not a difficult achievement but may take a couple of tries to get the timing right.

Settings Amateur handling model, all assists on including the racing line, all HUD on
Mode Solo - Time Attack (can be done on quick race but time attack removes AI drivers)
Track Snaefell Mountain Course - Sections - Starting Section 7 - End Section 12 - Noon
Bike - Superbike - Norton V4 RR (the bike all the way to the right)

Now you start at section 7 which will cut out a lot of time (and also mean an easier restart if you fail)

Start driving and get used to the bikes controls. The first "corner" section you come to will be called BALLAUGH BRIDGE, you can use this section as a little practice of the bikes handling.
Keep on driving and you'll get another slight left turn and slight right.

Then after around 1 minute 10 seconds (depending on how much you crashed) you'll get a section with a right, left, right, left right called the SULBY STRAIGHT. You need to control your bike through here keeping an okay speed (keeping on the bike is more important than being super fast here).

Once the road starts to straighten up hit the acceleration as much as possible.
Just one final hurdle in your way is a slight left turn but you can take this as fast as possible, just give yourself a good line (right hand side to keep the turn less sharp).
Once that is done with you need to continue on straight until you hit the target speed, as soon as you do the achievement will unlock.

If you didnt quite hit the speed then just pause and restart, this will restart you at the beginning of section 7 thus saving you about 10 minutes of riding.