Mini dirt bike wont star!? :(

Question

Hi there folks. Bought a mini dirt bike 5 days ago unfortunatly it wont start. Choke is on, fuel valve is on, petrol is getting through as I made sure by bleeding it. I have renewed the spark plug as the other one I got with the bike was a rubbishy chinese one that didnt spark properly. The new spark plug seems to be in fine working order but yet the bike still won't start. I mixed the petrol with the 2T oil in the correct ratio 25:1 oil. It may have been a few extra ml of oil but nothing too noticable really.

I am not very good at bikes therefore do not have a clue what to do when someone says something like "Take out the carb and clean it using cleaning thingy" etc lol. I only know basic stuff and so if anyone can help me by telling me what bit of the bike is faulty or the most likely to be please describe what it looks like and what I should do to it etc.

Thanks a lot! :D

Colin.

Answer 1

My one took a lot of turning over to prime the carb with fuel. Ignore the 25:1 oil ratio and go for 50:1 using a lower grade oil for running in then move onto semi, then fully synthetic oil.

Is the air filter fitted correctly? Are there any restrictions in the exhaust? Can you feel compression when you pull the starter rope? If these are OK and you have the spark and fuel then it must be a faulty carb or carb setting. Try to raise the idle setting by s******g the left hand side s***w on the carb in a few turns, try starting it with a part throttle opening. You can contact the supplier. Beyond that, cancel the credit card transaction on grounds of faulty goods.

Good luck  

Answer 2

This isn't gonna solve any problem but it will probably get it started spray some gas into the throat of the carbeurator which if you take of the seat and number plates off and see the air filter take it off and spray some gas in their and it should start and if it does then it's your carbeurator that needs cleaning to fix that you don't have to take the carb out just get some marvel mystery oil which is sold at any auto part store and pour some into the gas tank and turn the gas on and let it sit for about a day and start it up but be careful with the throttle and the engine is gonna be turning fast and it will die a couple times you just have to start it back up let it drain out till it dies and repeat that procaess until it sounds good and stays running then you should ready to ride