Gday, I'm new to this (ATV's and dirt bikes in general) and have just bought my son a 110cc Loncin ATV. It worked a treat straight out of the crate and started first go. He rode it for about 20mins with no problem. He was only feathering the throttle. The wife hopped on and had a go. After 5 minutes of riding she opened up the throttle. In her words the bike started to take off and then just died. Haven't been able to start it since.
The fuel line to the carby is good. there is heaps of battery power and it will keep turning over but just won't fire. And I've taken the advice of the earlier responses given to Grump (tether cord etc).
I live on the other side of the country from the importer so he's no help.
Any help would be appreciated as I have a very keen future ATV Champion on my case to get it started. Has anyone had issues with spark plugs before with these Loncin's??

Cheers
Ezza
North West Oz

 

1. Check fuel
2. Check Spark
3. Check Compression

From your description, I'm guessing a sudden loss of compression. Did you follow the break-in instructions?

 

From the way that this happened, I would guess that something is clogging the jet(s) in the carb. The easiest way to check is to get a can of starter fluid (either). Spray a one to two second shot of it on the air filter (if paper type) - (if foam type, you have to remove foam, the either will 'melt' it) NO MORE THAN 1 to 2 seconds of either !!!! (more can blow the engine)

If the engine then starts and runs for 2 to 3 seconds, and then dies - you have eliminated ALL problems other than 'fuel delivery'. Some piece of 'foreign matter' stuck inside the carb is a 98% probability. The only remedy is to remove the carb, take it apart, clean it, reassemble it, and reinstall it.

Do a 'search' of the forum to learn how to do this.

 

Also, take a look at the plug condition. If it is carbon black around the electrode, you should replace it.

 

Cheers for your help. Stuck at work this week so I will have a look on the weekend and get back to you all on how this problem was sorted.
thanks again
Ezza

 

OK,

I took the carby off and pushed a small piece of wire through the jets. A small piece of black plastic came out. A discussion with my mate lead us to believe it was from the tank and was just a small piece that came away from the join during the moulding (conspircy theory, we're reallly not sure where it was from.). I also replaced the plug with a NGK one.. and yah, it started first go.
Riden for about an 90minutes with no drama's. Great little bike for the money.

Thanks for all your help.
Ezza

 

Glad to of help 'mate' - it just absolutely 'amazes' me (even though I understand the whole system of the 'World Wide Web') how easy it is to get in touch with people half way around the world. Of course, the British helped a lot with the 'colonies' speaking English spread around the whole Empire. With the 'web' having so much 'English' content - I wonder if in 15 to 25 years, the 'World' adopts 'English' as kind of a 'standard'??? Dale from New Jersey, USA.