2004 Yamaha YZ 125 "running rich" Questions

...running to rich or to lean which will be a carb issue.... do you foul plugs allot?or get a black oily residue leaking from exhaust?( to rich or to much fuel to engine from carb ) if not then sounds ...

2000 yz125 keeps on fouling out plugs 2000 yz125 keeps on fouling out plugs just had carb reworked.runs good for about 5 min or so then you have to putin a pulg. Fouled plugs are typically caused by ...

...running rich and my son keeps fawlling plugs on it. Also bike does not stay idle for long. Any ideas?????????????/ first off make sure the oil gas mixture is correct and mixed very well.... have the ...

running the choke n had anything to do with the bike not starting again. I catch myself miles from home and find the choke still on. Just makes it run a little rich. If anything I would check the plug

...running to rich on fuel. Put in the proper plug for that bike. It has to run in the right heat range. Then raise the clip one notch on your metering needle, thus lowering the needle and leaning the ...

rich off the bottom, so I'd recommend running a 42 pilot instead. When it's really hot out (over 90) you can run the 135 main jet. Screwwing with carbs is fact of life with these bikes - you will have

my bike is fouling plugs when i ride and race in the woods. not when i race motorcross. i tryed a hoter plug. didnt help went down 2 main jet sizes didnt help that much. the guy i had it off of boged ...

2004 yamaha yz 125,All stock,wont kick start but will pull start,then it sounds flooded and gas smell is real strong.wont idle withoutkeeping motor reved.thanks forthe help...... sounds to me like the

...running a br9eg plug with the fuel mixed at 32:1. It's likely just jetted too rich. If you pull your spark plug, it will likely be black and oily. To correct this, you need to alter your jetting. ...

running a 490 main jet on a stock motor. the plug is showing lean. Oem spec for sea level is a 410. plug looks the same with a 380 main or a 490 main. why can't i make my bike run rich? New piston,and