Oil!!!!!!!

[400exMO]

What oil should I be running in my 400ex. Stock everything but pipe and filter. Should I run a synthetic?

[coryatver]

I would. Dyno oil last about 1 ride untill it needs change. The 400ex motor ruins oil.

[400exMO]

Dyno? And i've heard running synthetic screws with the clutch.

Originally posted by 400exMO
Dyno? And i've heard running synthetic screws with the clutch.

I being running synthetic in my quads for the longest and nothing wrong with my quad

i have run synthetic in my 400ex since i have had it...it is a 2000 and still on the original clutch plates.
I change the oil in it every 5 to 10 rides(depending on how hard i ride) and most of the time, it still looks like new.

[400exMO]

Well then what brand and weights of synthetic should I use?

[jsmith2232]

I run the bel-ray thumper racing 4stroke semi-synthetic oil. and have had no problems with it at all.

http://www.rockymountainatv.com/prod...0&navType=type

[MO-EX-RIDER]

i use ams oil 10w40..lil pricey

[Rip_Tear]

As long as the oil doesn't have friction modifiers it should be fine, it if says it's for a wet clutch it will be fine also.

[400exMO]

So I'm now planning on switching to synthetic. But what weight is recommended?