Question about 2005 kawasaki KX 250
I have tryed diffent plugs br8 br9s and tryed diffent mixs with the fule and 2 stroke am goin to try cleanin tank and fule lines and then try a new plug but if ne one has ne idears plz message me thanxs dan
NGK brand spark plug BR8ECMVX is the stock plug for the bike. The proper gas / oil mix is 32 to 1. That means 4 ounces of 2 stroke oil per gallon of gas. The posting was not clear as to just what the problem is. If you are burning up plugs there may be a air leak in the intake system making the bike run lean. A lean fuel mix runs hot.
Posted on Jun 25, 2009
Hey dan, I own a 2005 kx250 also , had a heck of a time jetting the bike to not foul plugs but here's what I did ,lower the pilot or low speed jet to a #48 (stock is #50 ) this will clean up the bottom end and make it a little snappier , If you're going to ride the bike wide open alot like in sand riding you could leave the stock #160 main jet in , If trail riding you'll want to drop to a #158 main jet this is all for sea level to approximately 1500 feet and 60 to 75 degrees, if you ride in 55 degrees and below you'll want to richen up the mixture to stock specs or more ,I'll use a #50 pilot and #162 main jet for 50 degrees and if it gets hot like 90 to 100 you'll probably want to raise your jet needle clip up one clip position (2nd from top is stock) to the notch on top of needle , all of these suggestions are what I use here in Oregon just make sure you're watching the plug color all the time especially when leaning the engine out it should be a light to medium dark brown in color, If it gets leaning towards a white color on the ceramic under the electrode you're in danger of seazing the engine, the last thing is run your premix 32 to 1 with a 50/50 race gas to pump premium ( if you can afford to) and that will help both keep plugs from fouling and prevent pinging of the engine , Also you need to use a old plug that has color on it when you're jetting , that will make it easier to see if your running lean. I'll bet this sounds like quite a hassle but once you get it sorted out you won't be eating $11.00 spark plugs anymore .I hope this helps , I haven't fouled a plug now for 2 years.
Posted on Jun 27, 2009
You don't always run 32:1. It depends on what king of oil running. If using racing oil most require 50:1. It says it on the back. 32:1 is to much oil and will foul plugs expecially if you do not run it hard. The plugs I always ran were br8es and br9es. Both ngk
Posted on May 24, 2012
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Posted on Jan 02, 2017
With a bike that is 35 years old lots of things could be the problem. I will list what to look for in a "most likely" sequence but with a mind to some of the easy things to check first.
Let me know what you find out.
Please rate this answer. Thanks Brandon!
Posted on Apr 02, 2009
sounds like your coil is packing in try the coil on another bike buddy if this works on another nike get back to me
Posted on Sep 06, 2009
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