mainly the 99 second run, I always miss a platform, really you just need to come do it 
but that'd be a challenge in itself XD
Oh, you mean the Puzzle Piece behind the turbines on the back of the ship? Okay, here's how it's done the easier way.
When doing this one, you first head to the back of the ship and on the left side is a tube to go through. Inside, you will find a few baddies and a switch. Take out the baddies and ground pound the switch. You will then get a cut scene where the propellers will slow down momentarilly.
Head back the way you came, keeping to the left until you spot a door on the right. Take out the door with Kazooie and enter the new opening. Jump down the long shaft and keep moving forward, despite taking damage. Don't worry, you'll make up some of it.
: Now, go forward and you'll come to the first spinning platform. Wait until it stops and run across while jump flying over the gap. (A twice move over the gap.) Now, here's where you need good timing. You need to flip jump on the gears to reach the top. However, when you are on the third gear, jump and peck towards the enemy to avoid getting knocked off into the acid. Grab the Honeycomb he drops.
Now, at this point, take a good look at the two spinning platforms. You'll notice one tends to stop upward, while another stops downward. Head for the one that stops upward first. You'll have to wait for the pipe to stop moving and run across with Kazooie. (Being ready ahead of time helps alot here.) After you get across, wait until a split second before the spinning platform stops. Quickly run across and jump flip to the top of the platform. Now, IMMEDIATELY jump fly across. You'll easily land on the other side. Ground pound the switch. Now, before going for the other one, note the stairs nearby. Use them to get an extra life.
Now, the main thing about hitting that switch earlier in the seperate room was to make those pipes stop and to slow down the propellers in the middle. It is recommended to time your jump carefully and go through the propellers to pick up the puzzle piece in the back of this room, but if all you have to get is the piece behind the turbines, you can take the long way around, which is alot easier for the not so advanced players. Either way, once you get to the other side, wait until the spinning platform is just about to stop. At the percise moment, ground pound the switch. If timed right, the platform will have stopped at just the right time to use Kazzoie and run and jump like mad across. Once you've hit both, you don't have to worry about the spinning pipes. Just run across, jump over the gears and run across the spinning platform quickly by jumping over the gap. Keep going and head for the ladder. Climb like mad. Once on top, keep to Banjo and use the jump-peck while moving forward technique to take out the green monster that will come out. Switch to Kazooie when you land and head out the door.
Now, here comes the tricky part. Run to the back of the ship as fast as you can. Jump off the furthest back part and when you are in the air, let go of all buttons and hit Z to dive bomb quickly into the killing water and then hit B the VERY MOMENT you are under the water to save a little extra time. If done well, you should have between 15-20 seconds left. However, considering everything, you have until your air runs out to get it most likely. Just get in those stopped turbines and grab it.
Pulling this off takes plenty of practice and a little bit of luck, but if done well, you shouldn't have too many problems when doing it this way.
Oh, and as an added bonus, if you like, I can share with you a secret of the huge Box Boss that inhabits the board, that is actually used in the Speed Run. It's a very cool glitch and highly recommended for those who dare to try to beat this game in 4 hours. :^.^:
Best of luck to ya, Tails!
