sorry what do u mean with strong ? the flywheel is new and the magneto too

 

If they are new then they are probably ok.
I am at a loss as to why it's not producing enough power. I know of instances where over time the magnets lose their strength and the magnetic field is not strong enough to induce a current(electricity) into the coils. The other reason could be that the magnetic fields between poles is not weak enough. This would mean that the 6 magnets are acting as "one big" magnet (around the flywheel) and with no collapse of the magnetic field no current can be induced. Theoretically!!
Why don't you try the old flywheel?
I can't seem to think of any other solution.

 

It would have been nice if you could check the voltage on the red/black stripe wire to ground. But you can't check it with a voltmeter.

 

the old one give me more volt when im testing white or yellow wire . you think a bad ground or a mix of ground wit power in the connection of handler brake or head lights or starter solenoid has to so something with the no spark ?

 

with the voltage tester 48v +

 

NO!!!
The reason is that the voltage the voltage produced by that coil is not ''constant'' but comes in ''PULSES" which a voltmeter can't measure accurately. Only an oscilloscope is capable of measuring it. Personally I think it's not worth the expense and trying.
At the moment I can't think of a reason why this is happening.

 

thanks my friend for helping anyway and returning the magneto and getting another . you think voltage regulator is bad ?

 

The best way to do a good repair job is to diagnose the problem (find the faulty part and the reason that caused it) then replace that part with the same.
In your case you went and replaced "everything" without being sure that what you replaced had a problem. Now you want to replace the regulator. Why?
Earlier on I asked you if the CDI you got was AC or DC. What was the one you replaced? AC or DC?
Are you sure that there was something wrong with the wiring?
Did you fit the new wiring correctly?
Is it properly grounded?
You see there are so many questions which have to be answered before a proper repair can be done. If you just go on to buy new parts(through guessing) you may as well buy a new bike!!!

 

how i know if is ac or dc the cdi ? the new wirin is not the same from the old one the different wass in the head lights plug and tail light plug and some plugs like the starter solenoid handle brake the color of the wires dont match the colors of the other plug so i tooke out and change the position of the wire . and the ground looks ok

 

The best way to find out what kind of CDI your bike uses is from the wiring diagram or manual of your SPECIFIC model. One not so sure way is to compare the sizes because a DC CDI is usually much larger than an AC CDI.
As for your wiring, while the colours are important, it is MUCH MORE important for the circuit to be wired correctly so each wire goes to the right component in order to perform the right task. If you go ONLY by the wire colours then you may end up mixing up the wires.