1986 YZ125 how many litres of oil does it hold?

not knowing what it is you drive and the engine, most motors hold 4 to 5 litres of oil with a new oil filter. not knowing what your car is and the year the grade of oil can be 5w30 or 10w30, check with what the manufacture requires. you have the same problem with the transmission question. most hold 5 to 7 litres of trans oil, depending on the transmission, and the oil depends on what make of car you drive as GM vehicles use a different type than say a Ford of Chrysler and even different again with the imports.

the capacity is cast into the caseing near the oil filler will look something like 800cc or 1000cc

1000 cc =1 litre

A dry engine holds 3.6 Litres Oil change with filter change 3.1 Litres and without filter 3.0 Litres

around 5 litres i would expect

Lubricants and capacities
Engine oil options
Ambient temperature range Cold climate
Engine oil grade SAE 5W/30
Engine oil classification API/ACEA CI/C3
Ambient temperature range Moderate climate
Engine oil grade SAE 5W/30
Engine oil classification API/ACEA CI/C3
Ambient temperature range Hot climate
Engine oil grade SAE 5W/30
Engine oil classification API/ACEA CI/C3
Engine with filter(s) litres 9,5

I own a small Mercury outboard so I did alittle reading in the manual and the ratio for your 86' 115 HP is 50-1. Hope it helps. Coach Theune

3, 13mm bolts hold it in.

Best is to fill about 5 litres and start the vehicle.While idling fill oil in 500 ml incriments while checking the level in between.Each vehicle seems to have a mind of its own.I have had no experience with Comma oils.Most effective would be to replace the transmission filter at the same time and there will always be a little oil left in the tourque converter hence the high volume in your manual.