I have a 150cc sunnydongfangstg scooter and its not firing no sparks. Could it be the cdi box or what. And without the cdi box on the scooter it want come on.

SOURCE: I have a 150cc jonway scooter. When I open it up

I found that if I run 87 octane gasoline the engine accelerates up to full speed without the skipping and bogging down at any point it is running. It is worth trying. also try putting some "Sta-bil" fuel stabilizer in the gasoline - it has the ability to keep the carbureator cleaner. Not just during the time you are storing it, but rather all the time.

SOURCE: the engine is firing on one cylinder and when the

Clean the carb on the bad cylinder. It may have a plugged pilot jet. The bike has CV carbs. There is a chance that the offending carb may have a pin hole in the diaphragm causing one slide to open later than the other slide. This could also be the problem. With the air cleaner removed, look at both carb slides and see if they crack open at the same instant or if one is definitely later than the other. That will confirm or eliminate the diaphragm.

A top rating for this answer? Thanks!

SOURCE: 150CC Roketa Scooter

Hi and welcome to FixYa,

On most versions of Roketa 150cc engines, the choke is automatic and electrically driven..  It is integrated with the carburetor.

Good luck and thank you for asking FixYa.

SOURCE: I HAVE A 150CC SCOOTER WITH NEW STATOR AND COIL

change the computer box with a nother 1 it might have blown

SOURCE: cant get my 50cc scooter to fire up-no spark. any

• Do you see spark? If not, check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the side stand kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it.
• Is the handlebar kill switch on? Is it shorted out?
• Check the fuses.
• Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires?
• Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center or side casing.
• If still no spark, get CDI system and coils checked at the dealers shop.