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My son has a 150cc Jonway scooter. One day it suddenly wouldn't start but cranks well. There is no voltage on the coil and likewise no spark. I replaced both the CDI unit and coil with the same result...no spark and won't start. The CDI unit is a 5 pin unit. The single fuse from the battery checks OK. The kill switch fuctions as it won't crank when in the off position and either front brake must be depressed to get the bike to crank. This I understand is normal operation.Mervyn Crofton email add.... MervynJohn.Crofton@capetown.co.za

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  • 85 Answers

Http://www.scooterfocus.com/scooter_troubleshooting.html
Read the article , I hope you'll find a solution .

Posted on Apr 30, 2017

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Posted on Jan 02, 2017

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SOURCE: 2000 V-STAR 650 YAMAHA CRUISER

1. #1 test. Obtain a 12 volt circuit tester, the type that looks like an ice pick with a wire coming out of the handle. With ignition on, hold the tip of the circuit test against the post of the coil, the post that is marked with a + The light in the tester should light up, meaning you have battery power. If you don't have electrical power there, trace back to battery to find out why. If you do have power at that point
2. Moving the the opposite side of the coil and place the tip of the tester again the post marked with a minus. With the key on, crank the engine. The light in the tester should flash. These 2 test have just tested your battery and ignition system. Bill

Posted on Nov 19, 2008

  • 3567 Answers

SOURCE: No spark

Check the side stand kill switch if your bike has one. 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 kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it. Check the fuses. How good is the battery? Try a jump start from your car battery. Is the handlebar kill switch on? Check the operation of the ignition switch and all kill switches with a volt ohmmeter. Install new spark plug.

If that doesn't do it, 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 casing. If still no spark, get CDI system and coils checked at the dealers shop. You can screw up a CDI unit checking it yourself.

Posted on Jun 18, 2009

pippall
  • 1486 Answers

SOURCE: YY 150 Jonway cranks good but no start. Hits every

Yes the coil seems to be your problem.

Posted on Aug 01, 2009

  • 1 Answer

SOURCE: Sunl 150cc Won't start

sounds like the CDI module. I've had it go out on a couple scoots I've owned. Take it to a shop and have them check it

Posted on Dec 31, 2009

  • 2 Answers

SOURCE: I have a sunl 150cc

Sounds simple, but do you have a kill switch on your scooter? Be sure it is not in the kill position.

Posted on Sep 07, 2010

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