32:1 if you race and 40:1 if you mostly trail ride.
You need the mixture of gas and oil mixture for 2004 YZ 125 in the ratio 1:32.
50:1
DEPENDING ON WHAT TYPE OF FUEL YOU USE , IT CAN BE EITHER 40:1 , OR 50:1 .
Yamalube it is ment for the bike.
125ml
No oil filter, the YZ125 is a 2 stroke.
1 quart
82-83 yz 100 holds 600 ml,hope that helps
no its premix but there is 4 stroke oil in the gear box
run 32:1 pre mix ratio 4oz oil to 1 gal of gass these little engines turn high rpms they need lots of lubrication
750ml - 3/4 of a quart
10w30 will be fine