WHERE IS THE FILL PLUG ON A YZ 426

The 426 has a dry sump and an oil tank in the frame. You must check the oil level after running the bike, which will scavenge all the oil from the bottom of the engine and fill up the oil tank. Get it warm first and ride it for about 5-10 minutes. Then stop the bike and check the level. It's a pain, but that's the correct way to check the oil.

Hi, here you go:

Oil capacity is the same as the 250.
1.5 ltrs at oil & filter/s change.
700mls to 1ltr without filter change.
This bike has what is called a dry sump. You fill your oil at the filler point that is located in front of the fuel tank on the frame. It uses the front frame tube as a container for the oil & pumps it back & forth to the motor. This bike has two oil filters.A cartridge type one located behind the small round cover held in place with two bolts that is located on the clutch cover.The other filter is a screen attatched to the spiggot which the hose from the frame(front bottom) slides over. Remove the hose(frame front bottom), undo the spiggot that the hose was attatched to,and as you pull it down to remove it you will see the fine wire screen that is attatched to it.
When you remove the oil filler plug(in front of the fuel tank)you'll notice it has a dipstick on it. When you fill the tank the oil level will seem high. Run the bike first(to let the oil circulate) then check the level on the dipstick. It will now be much lower. adjust the level to the correct level & away you go!
I recomend changing the the cartridge oil filter & cleaning the screen every time you change the oil. Use a high quality oil like Motul & change the oil regularly.
Also keep your air filter clean & oiled properly.

Good luck!!
EJ Kudelka

Oil capacity is the same as the 250. 1.5 ltrs at oil & filter/s change. 700mls to 1ltr without filter change. This bike has what is called a dry sump. You fill your oil at the filler point that is located in front of the fuel tank on the frame. It uses the front frame tube as a container for the...yz-maniac

my 450 holds about 1.2 qts or litres, the 426 will be similar, 1 litre without the filter change
but you when you drain it there is another drain on the frame down tube. and to test the level you need to start and idle the bike for a minute , for the oil to pump through and establish a level that you can read on the dip stick .

SHOULD EITHER BE ON THE NECK OF THE FRAME WHERE THE HANDLE BARS ATTCH OR UNDER THE FRONT OF THE FRAME JUST BELOW THE PETROL TANK

im pretty sure the 426 has a dipstick on the top of the frame just between the handlebars and the gas tank

your motorcycle is wet type clutch so you don't have to worry and it is installed at the right side of the motorcycle the left side is the magneto with the coil.

Hello phwolfe,
Did not backfire but , boged out appling fuel. Found it was flooding because
the floats were over filling the chambers. Adjusted float settings (by eye )
problem solved !! Keeping the chambers 1/2 to 3/4 full worked for me.
My Bike is a 1983 Midnight Maxim 653cc. 4 Cylinder. Maybe yours is fuel injected ?

Best of luck !!

Ron