Question about 2003 kawasaki KX 250

1 Answer

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

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 3,567 Answers

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.



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers


the mixture ratio is 50 parts gas to 1 part oil. Use only a good quailty stroke oil, never use motor oil

Nov 01, 2011 | Quad 47 cc / 49 cc Pocket Mini Bike...

1 Answer

What kind of gasoline?

  1. Check your manual for the proper gas-and-oil mixture. For almost all modern two-stroke engines, a 50-to-1 mixture is recommended. That requires about 2 1/2 oz. oil for every gallon of gasoline.

  2. Use only two-cycle oil for your mixture. This oil is made especially for these engines and can be purchased at gas stations, hardware stores or any other place where you buy regular motor oil.

  3. Pour the proper amounts of gas and oil into a fuel can. Shake the can well to mix it.

  4. Label your gas can with the mixture ratio. You can use the same mixture for other two-stroke engines.

  5. Shake your fuel can thoroughly every time you refuel. After a while, the oil will settle out of the gas, and shaking it up ensures that the oil and gas are properly mixed again before you put the fuel into your chainsaw.

Mar 06, 2011 | Garden

1 Answer

Confused a little

A 4 stroke motor does NOT have Oil in the Fuel. There is NO fuel mixture. Just use regular gas. The only place you need oil is in the sump, and regular 20/30 motor oil will be fine.This only needs to be replaced when low on dipstick in crankcase.

Mar 08, 2010 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

2 Answers

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

Feb 10, 2010 | 2003 kawasaki KX 125

1 Answer

What is the oil mixture ratio for a 2005 kawasaki 250

Use TWO STROKE ENGINE OIL in the pump. If not using an automatic oil pump, then mix the gas and oil 32 to 1. That equals 4 ounces of TWO STROKE ENGINE OIL to one gallon of gas. NEVER use motor oil in the gas. Only two stroke engine oil.

Aug 31, 2009 | 2005 kawasaki KX 250

3 Answers

I just bought a 1984 suzuki rm 250, this is my first 2 stroke, what mixture should I use?


Aug 25, 2009 | 2003 Suzuki RM 250

1 Answer

Kx 125 2003

im pretty sure that the bike is a all in one menin that oil in tranny is same that flows in motor

Jul 22, 2009 | 2003 kawasaki KX 125

1 Answer

Engine problems on a kx 250 2 stroke

On a 2 stroke bike cause of smoke is due to excess oil in the fuel oil mixture, incomplete combustion in the cylinder or the engine oil finding it way in through the piston rings into the firing chamber. Check the oil levels and clean the plugs, which must be black in color by now, so replace if possible and if engine oil is low, the change the piston rings. Also look up the carburetor jets/nozzles are clean and the engine gets the correct fuel/air mixture by adjusting both fuel and air jets(turns)...sodeep

Jun 30, 2009 | kawasaki KX 250 Motorcycles

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

Unsure about gas setup

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.

On the Gearbox oil for 2-stroke engines with a wet clutch, SAE 10W40 is the standard.

Good luck and Thank you for using FixYa.

Jan 05, 2009 | 1986 Honda NS 250 R

Not finding what you are looking for?
2003 kawasaki KX 250 Logo

450 people viewed this question

Ask a Question

Usually answered in minutes!

Top kawasaki Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers


Level 3 Expert

76691 Answers


Level 2 Expert

342 Answers

Are you a kawasaki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides