What type of motor oil should i put in my 2005 rm 250?

underneath on the bottom of your motor...there is a drain screw right wwhere your bike sits on its stand..very easy to see

20w40 or 20w50 motor oil is just fine. Please, rate my answer. Thanks.

You can use 10W 40 motor oil.
I've seen some people put Lucas oil in them.

32 to 1. That means 4 ounces of two stroke engine oil per gallon of gas. NEVER use motor oil.

The engine doesn't use oil,the only oil it gets is from the 2 cycle oil mix in the gas,the transmission uses 85\90 transmission oil such as bel-ray or others. I would NOT reccomend running 10\40 in the trans...

hi,drop the oil, remove the right hand casing. undo the water pump casing. remove the impeller (10mm bolt) dont lose the copper/ally washer. draw the drive shaft from the inside of the casing. remove the bearing. remove the seals, keep note which way round the seals are. they should be opposite. one keeps oil in and the other keeps the water out of the oil. if there are any score marks on the drive shaft,replace it , as it will only leak again. to put it back together, just reverse process. hope this helps. kev.

you can use the expensive oil such as silkolene light gear oil or you can use 10w40 semi synthetic car oil. we have used this for 15 years of racing. never had a problem with it. never even had to change a clutch.hope this helps.

Its the head gasket ,you will have to replace it.

Castrol Syntec motorcycle 10-40wt is what i woul recommend and you have a dipstick. So if you have drained the old fluid start by pouring in 1 qt. then check the dipstick w/ bike level on level ground. Then add a little oil at a time until full..If you have a sightglass instead of a dipstick then fill half to 3/4 up the sightglass. Buy 2qts while your at the store...good Luck to you friend...Tim

use decent two-stroke oil at 50 to 1. don't ever buy oil from a gas station without sealed container; who knows what the oil really is