You will see a line that goes to the front oil tank remove that and the remove the screen and clean it also under that tank is the drain plug.

The stock 400ex motor is set up to run 91 octane and above only as per the owners manual and shop
manual

 

D/L the shop manual thats free .. Google it

i printed it out and took about 45 minutes as its over 300 pages

 

How does a 8.2:1 engine require 91 octane? it is a waste of money, ran reg 87 octane for years in both my 300 and 400ex with not one problem, unless saving money is a problem.

 

[QUOTE=95wolv;3064503]How does a 8.2:1 engine require 91 octane?

That is something only Honda knows but is what the owners manual says to run.

 

and if the manual said to run golden fairy dust, you would be running through the woods looking under toadstools? Not everything in the manual is necessarily correct, of course they would recommend 91 octane, they want you to run top grade fuel to keep fuel related problems at a minimum, that does not mean the engine requires it.

 

87-89 regular fuel if perfectly fine for a stock 400ex-




manual also says to use only honda oil- at around $10 qt- I don't think so....

 

Wow didnt think this was going to be a pissing contest. Well since you know best then run 87. I was just stating Honda says to run 91+. Since the OP was a novice wouldnt using a higher octane give him less fuel related problems as you stated?

As for Beergut Honda manual says not to use an energy conserving oil or an oil with additives not to run only Hondalube

 

thanks guys, y a i found the oil tank, so when i go to put oil in, is the same hole that contains the dipstick the same place u would fill engine or is there another fill cap im not seeing?

 

also how many quarts shall i get?

 

yes fill through dipstick hole.
Best thing to do is go to walmart and get a gear oil pump. Its about 12 bux in the oil section. Its used to pump gear oil in stern drives for boats.it looks like a soap dispenser pump. It fits on the quart oil bottles...no mess
I might be proven wrong but I use about 2 quarts when changing the oil and filter. I pump 1 and a half in then fill to second line on dipstick. I start it up let it warm up then shut it off wait a few min then check again.