Bike wont start, New cylinder
 

I have an old 2008 GZ that had a bad piston and head, smoked awfully.

Changed out the piston and cylinder with a rebuild kit, all new rings, pistons and cylinder.

Problem is I cannot get it to start. I checked the valve clearance, has spark, carb was cleaned 3 times, just will not start up.

Camshaft timing should be good and lined up.

Anyone able to help me figure out what's wrong?

did it all come as a kit, or some of the parts are different? did you check the way of the piston...how it should be mounted (front/back)?

It's been some months since last reply.
Have you tried spraying starter fluid into the air box?
That should be a quick and easy thing to try.

Fuel line could be clogged, remove the fuel line before the carb, see if fuel comes out. Or could be fuel petcock not allowing fuel through.

Remove the sparkplug and screw in a compression tester.
With fully charged battery crank it and open throttle fully get some compression readings.

If you tried the compression test and that shows as good I would (as suggested) and check your petcock for fuel flow.
Did you remember to hook the vacuum line to the back of the petcock?
Did you switch the petcock to the primary position to fill the carb up?

I know this may seem stupid for me to ask, but it is easy to forget some of the simple things. I have been there!