I just bought a used 450r so I went to a dealership to buy some oil. The parts guy told me to use red bottle on both the tranny and motor. Is this right? It seems a little weird to use the same oil for both sides.

Little weird is right!

Red bottle for tranny side and Honda GN4 10W/40 for the motor side.

Thats what I use anyway.. I'm sure you'll get a lot of responses from others. I've never heard of anyone using the red bottle for the motor side.

I just use the honda brand on both sides..What year is your quad because the amount the tranny side takes differs depending on the year of your bike, so the manuals say...

Red in the tranny side man

No I take that back.. I use the black bottle with red label and red cap the 10w 40SJ. I use this on both sides....

Honda HP4m or Honda HP4S on the engine side.

Honda HP tranny oil (red bottle) on the trann side.

Yeah 10w 40sj is what he gave me and told me to use on both sides (black bottle red label)... it is an '05

Just run Rotella in both sides.. way cheaper and never had a problem yet or clutch slip yet..

I have ran the black bottle gn4 10w 40 in both sides forever! Team honda runs the same! Never had any problems

I run amsoil in one side and gn4 on the tranny side

that is a synthetic right. How does your quad run with the amsoil can you tell a difference?

just a fyi but you can get honda oil from rocky mountain and its alot cheaper than the dealership at least my dealership.

You have a dealership?

The honda red bottle crap is way thick.....I wouldnt use it in my tranny....I know people that have used it and swear by it and others that have used it say its crap....