If you are having trouble with your mini bike/quad whereby its difficult to start, bogging down, cutting out or overflowing then this video could help you get it running sweet.
Of course i would check firstly that there is compression, (the pull start should be difficult to pull slowly) and that there is spark. Do that by removing the spark and with it still connected to the HT lead, Place it against the cylinder and pull the starter. You should get a spark arcing across.
Carbs are pretty much the most common of all problems on these mini 47 and 49 cc engines and that can be anything from overflowing, which is caused when the float gets stuck in the bottom of the bowl or when the cut of valve gets stuck open too, to cutting out and bogging down, This is usually a blockage of the main jet. It is very important to keep the jet clean and to make sure you can see clearly through it as seen in the video. if you get dirt in here then less fuel is able to get through when on open throttle and the bike is starved, causing it to cut out or loose revs.
make sure to get the 2 stroke ratio to fuel right too. A lot of the blockage problems are generally caused by having too much 2 stroke mixed in and it turns gooey after a while.
14 авг 2011
