Next i did the rear swing arm for the tire and fuel tank. I looked a lot over the web and im not really a fan of a spindle with the bearing and everything.
I believe its hard for it to fail since it is almost always closed but the price and work that is needed to fit the spindle does not work for me. I decided to go with a top and bottom bracket with a 1" bolt to go thru and a 2 bearing on top and bottom to make sure it turns, I actually wanted to just put bronze bushings because a bearing is a huge over kill for something that moves max 3 times a day if you really need to open and close at a speed of 0.0001 m/s. But....bearing were actually cheaper than the bushings.
as for security i found this spring loaded pin, super cheap and functional, there is one on each side of the swing arm, so one hold the arm in lock as an extra safety feature, and the other one pins into place once the arm is at 90º to keep it there.
http://www.amazon.com/Innovative-Components-AI1-2T1-5-B-TR6-included/dp/B00GAZQJ0O?tag=ihco-20
For the lock, I went with a latch, but for some reason, Slee off road and almost everyone does it wrong, I belive.
A latch only generates force in one direction, in the direction for the latch, It does so by generating presure in the form of an odd angle with the main pivot point. To the idea is to have the latch go in the direction of the arms movement.
For some reason, Slee Off Road does it in the exact opposite direction, it locks the swing arm vertically, so in theory, the latch is holding it in place with the friction of the arm and the bumper stop, this is dangerous because the latch will eventually develop play in the bushings of the pivots since its being forced to move in the direction were it has no function.
I did read several people having failure of the latch and i believe the reason is the direction.
another thing i could do was to put a U made out ouf 2 pieces of angle to hold the arm in place when its closed, so even if there is flex on the arm from weight it has stops on top and bottom so its super sturdy
If anyone has an explanation please let me know. I love to learn
here are some pics and video