Airbox modded but still splash resistant - Suzuki Z400 Forum : Z400 Forums
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post #1 of 5 (permalink) Old 08-25-2015, 09:48 AM Thread Starter
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Airbox modded but still splash resistant

I wanted better intake airflow but didn't want to have to go around every tiny puddle on the trail. I ended up cutting the lid above the water baffle and removing the snorkel end cap. Any incoming water still hits the back of the airbox and runs out the bottom instead of drenching the filter. There is also a 150 main jet and an FMF Ti4 slip on installed. The end result is great, the bike is much quicker revving and feels stronger compared to the sedated stock setup. I still need to grab an adjustable needle and fine tune a bit.

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2007 Z400
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post #2 of 5 (permalink) Old 08-26-2015, 03:12 PM
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if you find an adjustable needle source without buying a complete jetting kit, let me know where.
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post #3 of 5 (permalink) Old 08-27-2015, 10:27 AM
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If your carb is jetted right you will notice a nice difference with the hole in the lid.

Another option would be to buy a pro design pro-flow and install it to your airbox. You can then use a 400ex air boot and a clamp on style air filter either K& N or a foam UNI.

There are also a few options for the airbox lid. 1) no airbox lid and use a Outerwear on the filter. 2) buy a EHS Racing lid that is a modified stock lid with a outerwear on it. 3) You can use a K&N power lid (with outerwear on top).

03' Z400 -Full Ti Yoshimura TRS, FCR39, GP3 +2 stem, Elka stage 3's & link, Hermann swing arm, LSR axle, AC nerfs w/IMS healguards & pegs, DG bumper, OMF beadlocks, Maxxis I-Razars, Flexx Bars, QuadTech Shrouds

03' KFX400 - xc to mx rebuild going on here --->
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post #4 of 5 (permalink) Old 10-02-2015, 01:07 PM
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Is there a big difference between a BSR and BST?

Stumbled across this while researching intake adapters.

2005 KFX400

Last edited by phaze1todd; 10-02-2015 at 01:11 PM. Reason: Kindle Fire sux
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post #5 of 5 (permalink) Old 10-05-2015, 01:46 PM
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im not sure. I've never looked into the BST at all. I use a motion pro FCR fuel screw tool. its a short stubby flat head screwdriver that fits under the carb.
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