help with 99 yz250

[yzjock]

my 99 yz250 will start when plug is took out and cleaned but once started cuts out and will not start again untill plug is took out and cleaned again.just keeps cutting out.I am a novice when it comes to fixing bikes,can anyone help.

[yz250guy]

Have you tried a brand new plug with proper gap? That's the first place I would start, and make sure you have fresh fuel/premix too. Welcome to ATM

[Henry]

Originally Posted by yz250guy

Have you tried a brand new plug with proper gap? That's the first place I would start, and make sure you have fresh fuel/premix too. Welcome to ATM

YES! when i put in a plug without the plug gap set and with it set, it was like night and day. set the gap, if you are still having problems get some jets and try some different jetting...good luck!

[Florida 393]

Set the float level and spend time jetting the scoot correctly.

Bill

[joseph13]

What does the plug look like when you take it? Is wet, caked w/ oil, dry, etc.?

[redfabkustomz]

my bike run like crap too. but just the oppiset. first ride on a new cheep ngk plug run great one i stop and it cools off. hard to start? i moved up to a ngk race comp plug and have had no problems! so??? try that? or sounds like a lack off gas or bad gas. remove all the gas in the tank and the carb. befor trying a
new plug!

[MotoMan]

Originally Posted by redfabkustomz

my bike run like crap too. but just the oppiset. first ride on a new cheep ngk plug run great one i stop

^^^^^^^^^^What???^^^^^^^^^^^^







YZJock...try a new plug as the others have recommended, I am almost sure that will cure your issue.

[yzjock]

Thanks a lot guys will try new plug.What is the correct gap size for me to set.Have cleaned out fuel tank and put new mix in and cleaned air filter.When i take the plug out it is wet and a little oil.
Thanks again

[Henry]

Originally Posted by yzjock

Thanks a lot guys will try new plug.What is the correct gap size for me to set.Have cleaned out fuel tank and put new mix in and cleaned air filter.When i take the plug out it is wet and a little oil.
Thanks again

get a correct service manuel, and that will tell you it will tell you a lot of answers to other questions you may have.

[The Baron]

You might want to try a hotter plug since you are buying a new one anyway.

[yzjock]

which plug is best for the yz 250 not for racing ,just for fun ?

[joseph13]

The best think you can put in the bike until you get her dialed in is the factory recommended plug. Their is no reason, unless you have done alot of upgrades, that it shouldn't run great on the factory recommended plug. From what you described " a little wet with some oil". Sounds normal to a bit rich possible (without seeing the plug). After you cleaned the air filter and remixed the gas is it still doing the same thing? How long have you had the bike? Is it a new-used bike? Was it running great then just all the suddenly started having problems? What ratio are you running your fuel? Don't just jump in and start putting different plugs in. The factory recommends a certain plug for a reason. Mainly due to resistance issues in your ignition. Do like some of the others said and double check your plug gap and make sure you have the correct plug. After you have done that pull your carb and check the float level and inspect the jets for crud. It's not rocket science pulling one apart. Pretty simple! Let me know what you find.

Good Luck!

[yzjock]

Thanks a lot guys.Pulled the carb and cleaned out.put in a new plug and started first kick.
Thanks again.

[MotoMan]

Originally Posted by yzjock

Thanks a lot guys.Pulled the carb and cleaned out.put in a new plug and started first kick.
Thanks again.

glad to hear you got er goin man.

[joseph13]

Awesome! Happy trails!

[yz250guy]