32:1
32 to 1 hi i have an 04 yz125 and i use motoul 800 and i mix 10L of fuel to 330 ml of oil
If its a 2-stroke I believe its 750ml
750cc's on a ratio cup.
36 parts fuel to 1 part oil..........
24:1 or 32:1 the richer the longer the life i like 24:1 for my 1993 yz250
the oil mix is 32 to 1 or 50 to 1 for synthetic oil the oil mix is 32 to 1 or 50 to 1 for synthetic oil
DEPENDING ON WHAT TYPE OF FUEL YOU USE , IT CAN BE EITHER 40:1 , OR 50:1 .
Fuel /oil mix is 50:1
it is recommended for all fuel oil mix to be 50:1
The mix of fuel to oil ratio is 16:1
The YZ250 only needs about three quarters of a liter of oil. This equates to about .79 quarts, or a little over 3 cups.
Umm a 1987 YZ250 was a 2 stroke not a 4 stroke, but you should go to any local Yamaha dealer and get the oils for your bike, and depending on the oil you want wether it is transmission oil, or fuel mix oil, if you have a old bike I would use Yamaha's reccomended oil which is yamalube if it is a newer bike I would suggest synthetics if your bike is brand new. For the gears, use an 80 or 85 weight motorcycle gear oil. Honda sells a good one. On the '87 it tells you how much gear oil to use on the side of the case. For mix, its a 24:1 ratio. Go buy a Clymer repair book from your shop or online.