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No it has not run since the install and I've triple checked everything. I've tore it down and reassembled it 3 times. The piston is running up and down just fine. If the crank was broken then the piston wouldn't move at all right?

UPDATE/// Well I talked to my mechanic and he immediately told me my crank bearing needed to be replaced and that he wouldn't even mess with it because after paying him I might as well have bought a new motor for $369 and have him install it for $100. And then that was only a $100 if the wiring and carburetor would go on without a problem.

So I guess I might as well order the crank bearing AND a new scooter to get around on while I screw around fixing this motor. Again.

How hard is replacing the crank bearing??? Are there special tools needed?

--- end update////

Okay. If you have been following my threads, you know that I have have had more than my share of problems with this install.
I called TaoTaoUSA and asked them if they could tell me why my scooter would not start after installing the BBK. Their first thought was that I still didn't have any compression, which I dismissed at the time. Alfredo, the mechanic at TaoTaoUSA told me to recheck the spark by leaving the spark plug in the block and just pulling the boot and putting in a new spark plug into the boot and holding it against the valve cover. The spark was strong and so my heart sank, but I pulled the plug out of the block and did the "finger-the-hole" test ;D
What I found was that the engine had NO compression at all. As a matter of fact the engine had more compression before when I still had the bad piston in it. I mean I have nothing now.

Perhaps you might remember when I had first assembled the top end with the BBK and for some reason it was binding on something. I was turning the magneto by hand and and it would only go a half turn and then became obstructed by something. I took it apart and made sure that the chain was not bound up inside, then put it back together. Some how it was still bound inside and I tried the magneto by hand again. When it reached the point of resistance, I used a little more force than I should have and I heard a snap. It bothered me at the time so I took it apart again and inspected the parts, which seemed to be fine. When I reassembled the motor AGAIN, I noticed that the valve springs were dragging on the lash of the rocker arms and when they would compress in the revolution they would suddenly slip and make a horrible crack sound, but I figured it was the same thing that happens when you snap your fingers, if you follow the analogy.

Anyways I was able to fix the dragging problem and also put in the correct rocker arms, and the motor no longer bound, so I forgot all about the horrible crack snap sound that I had heard.

Does anyone know if there is something inside the valve inside the cylinder that may be broke? Or inside the block itself? Why would I have NO compression at all? the exhaust valve is set really tight but I can do nothing about that .0025) It seems to have a lot of compression (there is a good amount of resistance when kick starting it and turning the magneto by hand, where as before with the bad piston it had none).
Any ideas at all why it doesn't have compression would be welcome, as I am going to tear it down one more time and then just buy a new scooter.

Thanks.

Yeah I put a bolt in it and clamped it off. It does look a lot less complex without the stupid spaceship. I'll take the big black hose of the carb tomorrow and spray some in there if thats a good idea.

Okay I got the diagram posted. just wanted to make sure you saw it.

Xing thank you for posting the video. After taking off all that crap at least I can see what I'm doing. As you can see, I have a cheap little fuel diaphragm that doesn't look like yours. Trying to follow the simile Water flows down hill" did not work work in this case. It made no sense at all where the lines were going and how the fuel got to the carb. Anyways I have taken a bunch mor pics and yet another videobecause I am still thouroughly confused about which ports are which, especially on the fuel pump.

I've looked for a diagram but can't find one.









and finally the video...



Once again I appreciate all of your help.

cdoublejj- at this point I would love to waste fuel lol. I just want it to finally start. This has been going on for 2 months. I still haven't got to the part where I know how to adjust the carb's air or what ever. I can't believe I haven't just said screw it and paid somebody to fix it. I've considered buying a new fuel pump just so it looks like everyone elses and I can follow along easier.

Okay this is where I was but now Iv'e moved on to the oil pump. All the roller weights are in, and the crank case is put back together.