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I have a two year old chinese trail bike i bought with 500 miles on the clock i have done another 500miles then had trouble starting a couple of times then it refused to start at all. no spark at plug, fitted new coil, new plug, new lead, new cdi unit checked all connections, battery ok tried battery from other bike, getting 12 volts on both connections to coil and high voltage from plug lead, kill switch seems to be working ok have disconected it and tried.
Not even a tiny spark !

would appreciate any suggestions am totally baffled, thanks

nevermind

If you're getting high voltage at the lead, and nothing at the plug then I'm totally lost. The plugs plug directly into the lead... so if it gets to the lead it should get to the plug.

Will it spark outside of the engine? Like if you ground the sparkplug to the engine case and try to kick it over do you get a spark?

Buying a Chinese knock-off bike seems to be enough to cause premature failure. Some times you get just what you paid for, and buying a Chinese bike is almost always one of those times. Sounds like you paid for a lump.

Sorry to be the bearer of bad news, but someone has to be honest about these bikes. And honestly, they are junk.... junk with little-to-no dealer support. You're better off to cut your loses and buy a decent bike.

you must have called upon your years of experience and knowledge to come up with that answer.
I have other bikes as well and they all have problems from time to time.
I will take it to my local bike shop next week to get it looked at only he is to busy fixing japanese bikes this week.

The Chinese bikes/quads I've had the dubious pleasure of working on are right and utter "poo poo".

maxiboy wrote:you must have called upon your years of experience and knowledge to come up with that answer.
I have other bikes as well and they all have problems from time to time.

Any bike can have problems. The Chinese knock-offs are very well known for dying at a relatively early age. I don't think Buzz was trying to knock you. Actually, I think when he said, "you get what you paid for", he was being generous. I have worked on many of these motorcycles and scooters for friends and acquaintences, and I'd have to say that each and everyone got less than they paid for.

I think I posted on here last year about pulling the head on a knock off and finding a head gasket that had been cut out of an aluminum soda can.

I have been fixing (or attemtping to fix) these bikes for several years and they almost never stay fixed.

For what it's worth, if you're measuring high voltage at the secondary output of the coil, then the only things left in the chain would be either a bad plug cap/wire, or a bad plug.

maxiboy wrote:you must have called upon your years of experience and knowledge to come up with that answer.
I have other bikes as well and they all have problems from time to time.
I will take it to my local bike shop next week to get it looked at only he is to busy fixing japanese bikes this week.

Why yes, that's exactly what I did. My *many* years of experience, my Master Mechanics Ticket and my Millwright Ticket. And just a shmick of common sense.

If you somehow felt I was attacking you or your judgment, I'm sorry, I was not. I was making disparaging remarks about all Chinese bikes. Remarks that I will not apologize for. The Chinese makers have a long, long way to go in terms of production quality, engineering skill, and product support before they even come close to producing a machine that equals what Japan was cranking out 30 years ago. And to be fair, I think that one day, they probably will. But not for a long time yet.

Any machine can fail at any time, for hundreds of reasons. I make my living from this fact. The fact your local Japanese dealer is booked up also proves that. So does the fact that BMW, Mercedes, Ford Chevy, Rolls Royce, Honda, Yamaha, hell even Kia and Yugo ALL have service departments.

Have you found a shop who services the brand of bike you bought? If so, you're a very lucky person and should be getting to know them very well very soon. I'm betting you haven't found a factory supported service department for your machine. This does not mean you are a fool or anything like that. But reality is a blitch. And the reality is, Chinese bikes are low quality, use inferior copies of someone else's outdated engineering, poor materials and workmanship, and enjoy little-to-no manufacturer support. If you find that insulting to you personally, there's not much I can do about that.

Now, about your problem. You have swapped out a bunch of parts that didn't help. You need to test everything in the ignition before you throw more parts at it. Start at the pick-ups, hell, maybe the trigger fell off the flywheel. Test the pick-ups and trigger and work your way out until you find the problem. A service manual would be invaluable here. It will give proper procedures and values for each test you need to perform. Where to find a service manual for your bike? Got me....

On the other hand..... at 1000 miles, that bike has gone farther than most of it's compatriots ever have....