Riding the bike isnt the problem. There isnt really any obstacles or sharp turns so you can just drift around the shoreline but the damn pedestrians are just pot luck. One was right in my way and there was nothing i could and when i hit him it sent me into a spin and threw me off the bike causing me to miss the chopper. Then the chopper bit is pot luck because sometimes its just impossible to get out of the way of the rocket.
Grrrrr.
Edit: Done it. Stupid instructions ingame tell you to get in close and low so I thought you had to get close to take out the boat. All you need to do is keep a distance, stay up high and move around so the rockets dont hit you. Then eventually a rocket does hit but its scripted and you crash land.
Basically exactly the opposite of what the game makes it seem you need to do.
Anyway thats the first time ive beaten this game and I bought it on release. Its only taken me 3 years
.
Ill reload my save and replay the ending with the Deal option and then its onto the two DLC's for me.