Dirt bike will not start?

Why wont my Mini Dirt Bike start?

• Hello everyone. I was on my mini dirt bike about a year ago and I turned it off. I went up to my uncles to ride it a month later and it would not start. Left it for about 6 months and finally had a look at it. Not sure why it will not start. I have cleaned all the fuel out of the tank and replaced it with fresh petrol with 2 stroke oil. 25:1 ratio. I have checked the spark plug and there is a spark. I have cleaned the carb out and petrol is running through to the engine. The first time I tried to start it nothing happened. But once I had cleaned out the carb etc, you could sere some smoke coming from the exhaust. I know it's only a little 49cc chinese bike that tend to break but it should not break seeing as I have only ridden on it twice and for 10 minutes maximum each time. I was going to buy 'Easyspray' to spray on the carb and see if that helps. Any help would be greatly appreciated, thanks!

• Answer:

  I think you are on the right track. In general, if you have spark, fuel is the next major reason small engines don't start. If you try spraying starter fluid (or spray) and you get some firing, you will have further confirmation to check the fuel system.