Z 400 air box and go fast questions - ATVConnection.com ATV Enthusiast Community



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  #1  
Old 09-13-2004, 03:41 PM
Weekend Warrior
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Default Z 400 air box and go fast questions

Ive heard of taking the air box lid off for more power. When I tried it on my stock Z400, it ran very bad. Whats the trick? Carb ajustments? I would like to beef my rig up enough to hang with my buds 450ex. What are some good mods I can do, that wont hurt my wallet too bad? What would about $500 worth of go fast goodies do for me?
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Old 09-13-2004, 03:48 PM
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Default Z 400 air box and go fast questions

you could build an intake like the one on my photo page it is cheap and adds a good amount of power.
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  #3  
Old 09-22-2004, 02:37 AM
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Default Z 400 air box and go fast questions

You need to re-jet the carb. to compensate for more air flow...........
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  #4  
Old 09-22-2004, 11:11 AM
Red Rider
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Default Z 400 air box and go fast questions

The fact that it ran bad with the lid off, just proves that it will do a lot to increase your performance, AFTER YOU GET A REJET! You increased the amount of air, now you need to increase the amount of fuel to match it!

I like this lid (http://www.ehsracing.com/), because it has an Outerwears that keeps a lot of the dirt out of your box, yet flows huge amounts of air.
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  #5  
Old 09-29-2004, 05:16 PM
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Default Z 400 air box and go fast questions

for less than $300.00 I added a White Bros. (E) series slip on, K&N with outer wear removed the air-box lid and re-jetted and it made an honest to god seat of the pants differnce especially in the low and mid range. If that can make such a diff on my ex's it should do wonders for your z.
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  #6  
Old 11-05-2004, 03:01 AM
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Join Date: Oct 2004
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Default Z 400 air box and go fast questions

Get exhaust slip-on mufler ,rejet ,get air box lid cover from outerware and twinair ,air filter , rev-limiterand youll spank that 450ex.all for around 500.oo bucks.
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  #7  
Old 11-07-2004, 02:32 PM
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Default Z 400 air box and go fast questions

Yea, you needa jet yur carb...
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  #8  
Old 11-21-2004, 07:37 PM
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Default Z 400 air box and go fast questions

Go to albaaction.com and look at their performance packages, they offer FMF and ALBA, they are jets, full exhaust k&n filter and adapter, and outerware. This for around 500(480 for the ALBA i think) I am saving up for one of these for my z400 i just dont know which one yet.
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  #9  
Old 11-24-2004, 07:49 PM
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Default Z 400 air box and go fast questions

for $500, get an HMF full exhuast or a Yoshimura slip-on pipe. Then throw the rest at a performance CDI.
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  #10  
Old 11-25-2004, 01:43 AM
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Default Z 400 air box and go fast questions

You could get a 440 kit for $260 from wiseco, if not that, get a pipe, filter, and rejet it, but I don't think you could keep up with the R, its just to fast. But if you get the 440 you may have a good chance, but you or some one has to install it profesionally.
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