rm250 foiling plugs like crazy

[driversix]

i just went out on it the other day went about five minutes and i foiled a plug same thing happened with another three plugs im runnin 5 to one mixture with synthentic oil what should i do

 

[KX02]

Switch to 32:1 mixture.

 

[driversix]

so how would i measure that

 

[2-Strokes 4-ever]

4 oz of oil per gallon

 

[Britt Boyette]

Buy a Ratio-Rite from your dealer for around $5. Best thing I ever bought. I run Sprectro synthentic mixed at 40:1, works fine.

 

[bike_rider250]

http://www.csgnetwork.com/oilfuelcalc.html

 

[driversix]

actually im not sure if it was five to one i was told to put 1 full bottle of bel ray 2 stroke racing oil into five gallons of 93 octane the bottle has 13 ounces in it so what is that mixture

 

[RM Deamon]

49.231 to 1

 

[driversix]

so should i run a diff mixture or a hotter plug or what

 

[FruDaddy]

Def diff mixture, I run 40:1 motul 800 in 93 octane. I don't know of anyone that runs more oils than that. 32-40 seems the range. Do get the ratio_rite and if possible get the lid. If your dealer doesn't know what a ratio rite is, consider a new dealer. These can be purchased either together or separately from Dennis Kirk, sometimes a dealer won't have the lid but it keeps the crap out so all you have to do it measure and pour.

 

[snb73]

driversix,

I have an 03 RM-250. I run a 40:1 mixture with spectro synthetic and use a NGK BR8EG or ES plug. 40:1 seems to be a good ratio for 250's. Pick a good quality synthetic oil that is available locally. I stay away from castor based oils, they seem a bit finicky for me. Don't fiddle with the gas/oil mixture in an attempt to keep a plug from fouling. Try rejetting your bike. Since rejetting my bike I haven't fouled a plug, it's been 6 months.

Hope this helps, Steve.


Here is some good reading;

http://www.dirtrider.net/forums3/showthread.php?t=42618

http://www.thumperfaq.com/mxa_jetting.htm


Here are a few sites to give you a baseline;

http://www.fmfracing.com/jetting_2002.asp

http://www.onthepiperacing.com/forum/viewtopic.php?p=300&sid=13b59d01224f05752262287028eaf11e

http://www.mx-stuff.com/jettingspecs.htm

 

[DLHamblin]

i just went out on it the other day went about five minutes and i foiled a plug same thing happened with another three plugs im runnin 5 to one mixture with synthentic oil what should i do

Did it just start doing this? Has it been running well in the past?

Is it stock or modified? This additional info can help others lend better advice.

 

[driversix]

i havent gotten a chance to try ne thing yet ive been away but am going home to try it this weekend thanks for the help everyone