2003 Yamaha YZ 250 F "running rich" Questions

I have a yz250f 2001, and it splutters at low-mid rpm. Once you get the revs up, you can keep them there if you nail it ?? It runs fine?? Assuming your valves have been checked, and the air filter is ...

...running to rich.With new reed valves etc.it may need to be set back to the original manu. specs.With older parts it may have been retuned to make it run with the old parts.(carby jetting etc.)3 make ...

...running great and now we can't get it to kick start. He is new to this bike so I am wondering if the bike ran rich and fouled the plug. Pull the plug and then kick it over if there is a spark then ...

...rich on idle the pipes WILL get very hot,very quickly without some sort of air flow over the front of the motor and radiator.At the very least,have a strong fan blowing directly on the front of the ...

...running your bike. A lean condition is when you have too much air for the fuel, this makes HEAT. A rich condition is too much fuel for the air, this FOULS plugs. An easy way to adjust this is to ...

MY YZ250 WONT REV PAST 3/8 THROTTLE. I NEED HELP!! My 96 yz-250 will run fine in lower rpm's but once you go past 3/8 throttle it acts like its bouncing of a rev limiter. It bounces back and forth ...

...rich but not horrible. Is there a common problem with the yz I bought it new and it has very few hours on it. any help would be great! Its not common with YZ but is very common with not starting the ...

...rich mix, and it will eat the oil off the cylinder wall and you can burn the rings and cylinder wall. try this. at the bottom of the carb is a fuel screw(small standard flat head screw) turn it all ...