hi all might be a stupid question but ive heard not to use this type of oil so was looking for some advice to see if using this type of oil on my bike will be fine and wont damage it or anything any help will be great thanks

It won,t damage your engine as such. However, semi-synthetic would be a better and cheaper choice.

ah thanks mate top man

In the owner's manual should be a table what oil is suggested for your YBR. If you take the wrong (higher quality) your clutch may slip.

If you do not have your manual at hand -> yamaha is so kind to put those up on their website als .pdf.

Greetings, Martin