Question about 2003 kawasaki KX 250

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On the side of my 86 kx 80 2 stroke there is a hole with a pluge on it do i put tranny or motor oil in it and what fuel mixture should i use(would out board oil work

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The plug on the side engine casing is for 10w40 motor oil. NEVER use synthetic lubricants or oil with 'special' additives. They can mess up your clutch. The 10w40 motor oil is shared by the gearbox and the engine because they are a single unit.

Use 4 ounces of two stroke engine oil for every gallon of gas. That will give you a 32 to 1 mixture which is the industry standard. If the outboard motor is a 2 stroke (most of them are), the engine oil is the same. Note the difference > Engine oil verses Motor oil. Motor oil in the gearbox, Engine oil in the gas.

Posted on Feb 07, 2010

  • Mista B Apr 07, 2011

    tombones49, sorry to say here that the guy is talking about a Kawasaki KX80 Motorcycle engine, not an Outboard motor.

    Your info is massivley incorrect, not to mention down right dangerous, and i mean that with no disrespect at all. However i have been reading this board for quite a while now and am horrified at some of the innacurate replies. The damage that can be done to this guys KX80, due to innacurate info could be catastrophic.

    A KX 80 engine is a highly strung very delicate piece of racing machinery, which if not cared for properly WILL detonate from the inside out. Firstly, forget all you have been told in the past, i have been racing and maintaining these bikes and newer ones since i was a child, im now 35 and my kids are racing KX's now.

    To simplify things, you should be using a mix of 125ml of two stroke, preferably Silkolene Pro 2 or the likes, mixed in 5 litres of Super Unleaded petrol. Any more premix and you will be leaving clouds of blue smoke everywhere you go, your performance will be awful and not to mention, you will be spending more money on spark plugs than you could ever imagine. NEVER PUT ENGINE OIL IN THE GAS - EVER !!! 2 Stroke Pre Mix ONLY !!!!

    As for your gearbox. Kawasaki recommends Automatic Transmission Fluid for this. Specifically ATF Type - F. I have been using this for years and have never had any problems at all. Change's should be done after every second outing. BUT if you are ragging the nuts off the bike it should be done after every outing. 600ml of fresh ATF as a rule at every available interval will keep your bike tip top.

    If in doubt google search your problems matey, dont always take the first reply as gospel. And i hope that after you followed tombones49 advice (which i pray you didnt) that you and your engine is still in one piece ?

    Best regards, and happy crossing,

    Mista B.

  • tombones Apr 07, 2011

    1> The outboard motor comment was tied to the question asked, "would out board oil work?". ......My answer was correct.
    2> Running an engine to it's limits and using "Silkolene Pro 2 or the likes" may be somehow tied to an engine detonating from the inside out.
    3> If Kawasaki recommends ATF in the crankcase, that is fine.
    4> Standard motor oil is also fine.
    5> Please refrain from personal attacks in the future.
    .
    To the client, voeltzz, you can "rag the nuts off the bike" and repair or replace the engine as needed due to riding the design limits of the engine, or you can ride sanely and have many years of riding without fear of your engine "detonating from the inside out ". It is your choice.

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I have a problem again with my 86 kx 80 it dies when i rev it too high also when i drive (im using 30-1 mix but im using two stroke outboard oil)and when i take the sparkpluge out there usualy is a brown...


is it loosing water mate and the mix is 32-1 mate and get some good oil if it loosing water the head gasket has gone if it not this ckeck the jeting on the carb good look

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Please rate this solution. Thanks!

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Hi and welcome to FixYa,

It would appear that there are 2 questions/users on this post. Still, on your bike, normally, the tank hold plain gas, not premixed. The 2-stroke oil (2T) has its own reservoir attached to the right side, on the frame. The filler would be exposed and relatively easy to access and fill up.

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