My 09 yamaha zuma 50 wont start

SOURCE: 1994 yamaha fzr 600 spark plugs foul after about

Really...strange what you need to do is see if the bike is running too fat. So...warm her up witha fresh set of NGK! spark plugs. After the bike is warm take it down the street and back. When your on the way back get on the throttle and accelerate then shut er down and coast it into the garage. This will give an acuurate read on the spark plugs at operating temperature and under a load. Pull all the plugs. If they are brown like coffee with cream that means carbs are adjusted correctly. If they are black and wet too rich and if they are white or very light brown too lean. Other problems may be oil soaked plugs from loose top end parts. Maybe valves or guides.

SOURCE: wr25of yamaha spark plug location

The spark plug is in the center of the cylinder head you will have to remove the gas tank to get to it. When you change the plug put a little gas down the hole that should help it start after sitting for so long.

SOURCE: 94 yamaha 535 virago sounds fine, just wont start

Check to make sure your getting gas by pulling off the hose, if no gas comes out your petcock is clogged. If this is the case blow air up into the hose, and if gas comes out now your tank has to be cleaned out.

SOURCE: I need to know what the proper spark plug and gap

Set it at .030.

SOURCE: my 02 yamaha yzf 426

I have had the same problem with my bike, but found out that the jets were wrong and had to down size two times and now i have had no problems starting up or if i have stalled the bike it only takes about kicks to get it running again.