yz400f questions


11 replies to this topic
  • Cavi

Posted March 21, 2009 - 04:35 PM

#1

Okay I got a yz400f, now a few questions, mine is a yz and it had a dual sport kit which is currently in a box, but I will be reinstalling it. Anyway it came with many extra parts. It came with an extra airbox, the one that is in it has a green electrical box with a few wires hooked to it, I am assuming this is a WR airbox? Are the yz and the WR airboxes the same size? In other words will the yz airbox fit in the subframe if it is a wr subframe?
Also it has a wr rear fender, will a yz bolt right up? I want to use a yz fender as I will be using a LED taillight.

  • Cavi

Posted March 21, 2009 - 04:48 PM

#2

also what is the stock gearing on the yz400f?

  • flyer05

Posted March 21, 2009 - 06:01 PM

#3

I have a wr400f and had a YZ rear fender on it so I would assume it would work the other way also.

  • mxdude1986

Posted March 21, 2009 - 06:40 PM

#4

14/49 stock

  • yz400fsmasher

Posted March 22, 2009 - 10:08 AM

#5

i belive the gearing is 14/59

  • grayracer513

Posted March 22, 2009 - 10:20 AM

#6

i belive the gearing is 14/59

Well, everyone has to believe something.

It's not.

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  • texanspanking12

Posted March 22, 2009 - 10:23 AM

#7

Might want to see if a WR 426 stator is in that thing or lights will be dim as crap... Should be an extra yellow wire coming out of the case. Thats why mine isnt converted cause i couldnt find a cheap stator/ flywheel.

  • grayracer513

Posted March 22, 2009 - 10:24 AM

#8

The early WR and YZF air boxes are the same except that the WR had a top cover and snorkel bolted to it and the YZ did not. If you remove the cover, it becomes a YZF air box.

  • Cavi

Posted March 22, 2009 - 03:15 PM

#9

the stator that is in there has a yellow wire and a extra white wire comming out next to the conector, my guess is they did mod a WR stator and these are the hot leeds for the DS kit

  • Birdy426

Posted March 22, 2009 - 10:03 PM

#10

the stator that is in there has a yellow wire and a extra white wire comming out next to the conector, my guess is they did mod a WR stator and these are the hot leeds for the DS kit


Sounds right. Typically, to run DC for turn signals and such you float the ground on a WR lighting coil. The green box with wires coming from it may be either a voltage regulator (4 or 5 wires) or a NiCAd battery (2 wires). If the kit was a Baja Designs kit, both the battery and regulator are located in the airbox.

  • Cavi

Posted March 24, 2009 - 07:39 PM

#11

I don't know what the wireing is because it has a Electrosport kit which is self contained, everything is in the headlight.

  • travisn

Posted March 27, 2009 - 08:53 PM

#12

The early WR and YZF air boxes are the same except that the WR had a top cover and snorkel bolted to it and the YZ did not. If you remove the cover, it becomes a YZF air box.


I was wondering about that, my box has screw holes and everything... There is a piece of rubber zip tied to the top that covers about half of the opening towards the rear of the bike... I wasnt really sure so I just left it.





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