View Full Version : My 400ex mods
monkeyballs
07-01-2008, 12:28 PM
Hey I have a honda 400ex 2002. Any who these are my mods and I have a couple questions going with thoses.
My mods:
-yosh pipe full syste
-holes in air box
-k&n air filter w/ pre charger
-450r carb
I am planning on doing this:
-wisco light weight 11:1 piston
-stg 2 hot cam
-new cdi. Dyno or msd
Now I was wondering if I g2 run high test gas for the 11:1 piston
Then I was wondering if I need heavy duty head studs. (Stock boar like still 400cc's)
And in a long long long time I want 2 get a p&p job done.
Finally!!! I want 2 know how lightened fly wheels are. Im wondering if there worth it and where can u get them and if I am to do it how light should it be, and what type of riding I will have 2 do 2 makeit worth it.. lol
WEW TY first post on this site long one at that!
bets400ex
07-01-2008, 02:10 PM
how much of a difference of the 450 carb over the stocker? and did it bolt right up, any jetting? and where did you put your holes in the air box?
monkeyballs
07-01-2008, 02:26 PM
Ok first of all by air box I mean air box lid sry :-s And there is like 50 holes or so 1/2 a cm so pretty much 1/2 the air box lid is open.
Then there is enough of a diff with the carb there is 3-4 hp gain just by switching the carb (proven on a dyno) and its much more zipyer or responsive. For that I had 2 do a couple things:
-trimming the inside of the intake so the larger carb will fit
-The intake will need to be pulled foreward about a 1/2 inch
-The tps wires need to be cut off the carb
-Hotstart needs to be blocked off
All of that is pretty ez.. So no it did not bolt right up.
And for the jetting u g2 change that. I dont remember what jet im running my friend tuned it up for me so..
monkeyballs
07-02-2008, 08:58 PM
Hey one last thing I forgot 2 mention. If your going 2 up ur carb. Make sure its 2006+ 450r... since 06+ is frc much better. just make sure its frc. im upgrading 2 frc so.. :D gl
bets400ex
07-03-2008, 01:56 PM
Thanks for the help. im gonna start lookin for a carb. What if i was to get the 440 big bore kit as far as it bolting up, any idea
monkeyballs
07-03-2008, 06:31 PM
Once more np :D. Now as far as the carb just bolting up.. U g2 make a adapter. Or you can do it with out an adapter just its a REALY REALY tight fit! lol. I dont realy know how the bb will affect it.. And I forgot 2 say u need 2 also get a 450r throttle cable for that since it wont work with stock cable :-s. But u can get that for 15$ at any honda dealer. gl
bets400ex
07-03-2008, 07:50 PM
thanks buddy, sorry to bore you with this ****
monkeyballs
07-04-2008, 10:21 AM
Nah its not boring lol Makes me feel spetial :D. Dont worry I did the same thing.. lol And its siriously not boring at all. gl Here is a good plan of the adapter but thats for the 42mm one.. Not the 06+ frc. So if u dont get the frc u can use this lol. Ur going 2 have 2 get some one 2 make it thought.
bets400ex
07-04-2008, 08:10 PM
much appreciated!
monkeyballs
07-05-2008, 02:38 PM
any time :D
monkeyballs
07-06-2008, 10:31 AM
Eww I just got some info about the fcr carbs. They wont give any extra hp then the 42 mm. Unless you boar it out 2 the same sise as the 42mm. They just have way more responce.
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