yzf 426 twin ignition map


9 replies to this topic
  • gixxer7500_0

Posted May 17, 2009 - 12:39 PM

#1

Is it a myth or is it true that the wr426 ignition has a gray wire shorted down to earth to retard the ignition slightly and the yzf426 does not have the wire shorted to earth ? if this is true could i put a swtch on the bars and have 2 map setings with the gray wire for wet or dry ?

  • TIG88

Posted May 17, 2009 - 01:08 PM

#2

As far as I know that wire dosent even exist of the YZ cdi, but I could be wrong. The power differences have to do with cam timing, jetting, and exhaust/intake restriction too.

  • thumpyz

Posted May 17, 2009 - 01:51 PM

#3

i dont think it is a whole different map, just a little bit higher rev before you hit the limiter. 500 rmp's or so.

  • TIG88

Posted May 17, 2009 - 01:52 PM

#4

i dont think it is a whole different map, just a little bit higher rev before you hit the limiter. 500 rmp's or so.


It is infact a different map.

  • grayracer513

Posted May 17, 2009 - 02:33 PM

#5

It's a different map, but only on the WR. The YZ426 or 450 doesn't have it.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • gixxer7500_0

Posted May 18, 2009 - 12:55 AM

#6

As far as I know that wire dosent even exist of the YZ cdi, but I could be wrong. The power differences have to do with cam timing, jetting, and exhaust/intake restriction too.


It does exist i have found it on my bike it is in a plug off the cdi that has 2 conections one is black/white and linked to another black/white and the other is a single gray on its own if i knew how to upload pictures on here i would send you a pic
cheers
chris

  • gixxer7500_0

Posted May 18, 2009 - 12:57 AM

#7

It's a different map, but only on the WR. The YZ426 or 450 doesn't have it.


so if i bought a wr426 cdi it would come with 2 maps instaled and i could use either map ?

  • grayracer513

Posted May 18, 2009 - 04:37 AM

#8

so if i bought a wr426 cdi it would come with 2 maps instaled and i could use either map ?

Yes, but no one I know who has ever disconnected the gray wire from a WR has ever wanted to put it back for any reason.

  • TIG88

Posted May 18, 2009 - 11:05 AM

#9

Do you feel you have too much power, or power comes on too quickly? Is that the reason you're wondering about this?

  • FinchFan194

Posted May 18, 2009 - 12:08 PM

#10

That would be a cool mod to have for tight single track or slimy/wet conditions.





Related Content

Forums
Photo

Is it worth it? (Cam and High compression piston) by macgi77


Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies
Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

yz250x vs 450 4t comparisons (preferably desert riding) needed by JakeNorthrupYZ450F


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 9 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Forums
Photo

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride


Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.