Question about 2005 kawasaki KX 125

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My spark plugs on my kawasaki kx 125 keep fouling

My spark plugs on my 2005 kawasaki kx 125 keep fouling and when i take it out its black and oily it seems like. any answers???

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  • Danny
    Danny Sep 12, 2010

    what fuel mix ratio are you running??

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6ya6ya
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Posted on Jan 02, 2017

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rselvy
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SOURCE: kawasaki kx 250 fouls spark plug in 30 minutes

You definitely need to change the oil mixture to at least 40:1, use a good grade of 2 stroke oil. You do NOT need to return the bike. I'd highly recommend using an NGK B7EV spark plug. A hotter plug will stop the premature fouling. I would not recommend you decrease the oil to 50:1 because you are essentially robbing the engine from adequate oiling for the piston, KIPPS valves and the bearings. The hotter plug will make a huge difference but remember if he gets to the point where he is able to ride the bike to it's potential he will need to run the cooler plug, B8EV or B9EV. You can also use a cheaper plug in the same heat range, B7ES or B8ES. Those plugs should cost about $1.25 ea. and are an affordable cost of running the bike. It's not uncommon to replace a spark plug frequently, it's the nature of the 2 stroke engine.

Posted on Dec 08, 2008

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SOURCE: Top speed

no you **** going bigger in the back is more accel, smaller is more top end. a 48-46 would put you somewhere between 80-100 mph depending on the engine but result is **** low end. If your kx is 6 spd you would benefit from going up a tooth or 2 for lowend because it has topend already.

Posted on Dec 12, 2008

SOURCE: i have 2003 kawasaki kx 125 when you put it in

Hi cbloom,
You will have to probabley adjust the clutch either from the end of the cable at the side cover or from the above at the handle lever.

Good Luck .


Knight. ( Yamaha Seca XJ750A 1981)

Posted on Feb 18, 2009

  • 3567 Answers

SOURCE: Fouling plugs

Get a new NGK spark plug one heat range hotter than stock. Be sure the fuel mix is 32/1 using two stroke engine oil ( not motor oil ). A 32/1 mixture equals 4 ounces oil to 1 gallon of gas. Remove the cylinder head and de-carbon the top of the piston and head.

Please rate this solution. Thanks!

Posted on Apr 07, 2009

  • 2 Answers

SOURCE: need to know what year model my kawasaki kx 125 is

check on the logbook??

Posted on Apr 25, 2009

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1 Answer

2005 Kawasaki KX 125 wiring diagram


Hi, Ruben for this scenario you will need your service, parts fiche, and owners manual if you can't find the best tool you ever bought for your Kawasaki, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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Mar 28, 2015 | 2005 kawasaki KX 125

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I have a 2003 kx 125 and I cant seem to get the jetting right. I keep fouling plugs. My current carb settings are # 35 pilot jet, # 410 main , 2nd clip position from the top of my jett needle and air...


if your still fouling plugs then you still need to go with smaller # on main jet...are you spooging allot out of pipe and muffler? then your to rich still,smaller jet size!!!! 32:1 is a good mix ratio

Sep 04, 2010 | 2003 kawasaki KX 125

1 Answer

Need gas-oil ratio on 2004 kawasaki kx 125 2 stroke bike


32:1--40:1 any less than 40:1 And you take risk of damaging engine(crank and top end),Any more than 32:1 and it will smoke real bad and foul spark plugs alot.....

Aug 01, 2010 | 2004 kawasaki KX 125

2 Answers

2 stroke ratio


differnt brands of oil, suggest different ratios. The oil packaging will give recommended mixes
starting at 25-1 for the cheaper mineral oils, to 50-1 for the more expensive synthetics.

Apr 23, 2010 | 2005 kawasaki KX 125

1 Answer

Spark plug keeps oil fouling. What band of oil shoul use? Is 40:1 gas mix good? also wat spark plug? BR9ES, BR8EG, or R7376-9?


32 to 1 is the standard mix. That is 4 ounces two stroke ENGINE oil per gallon. The brand doesn't really matter. Don't use MOTOR oil in the gas. The stock plug is NGK brand, R6918B-9. I would suggest a hotter plug, R7376-8. The last digit is the heat range. The lower the number, the hotter the plug.

Feb 11, 2010 | 2004 kawasaki KX 125

2 Answers

Bike keeps fowling plugs could it be the


usually 2 strokes foul plugs when the oil is two strong in my old bike i mixed the gas 40:1 try that and if it dosent work i would take it to your nearest dealer and get them to check it out

Feb 08, 2010 | 2003 kawasaki KX 125

1 Answer

Fouling plugs


Get a new NGK spark plug one heat range hotter than stock. Be sure the fuel mix is 32/1 using two stroke engine oil ( not motor oil ). A 32/1 mixture equals 4 ounces oil to 1 gallon of gas. Remove the cylinder head and de-carbon the top of the piston and head.

Please rate this solution. Thanks!

Apr 07, 2009 | 2003 kawasaki KX 125

1 Answer

Spark keeps fouling but no clue why


Are you losing gear oil.
When the crankshaft seal leaks, oil from the gearbox is sucked into the crankcase, and this can foul the plug.
Also check the plug gap, most guys set the gap too small. It should be 0,7mmto 0,8mm. The plug should be a B9 EG, or equivilant.
Now, you can also change the plug cap to a type that has a built in resistor, this also helps with plug life.
Note that 2 strokes use plugs way more than 4 strokes, and you should replace the plug every 15-20 hours to keep your riding pleasant.
Good Bike you have there
Cheers
Jon

Feb 15, 2009 | 2005 Honda CR 125 R

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