Yz400f ignition timing


6 replies to this topic
  • Yammer-Hammer

Posted January 14, 2014 - 09:31 PM

#1

I have a 1998 yz400f motor im using for a special project and need to advance the timing about 5 - 10 degrees and am wondering if there is any way to change it without a programable CDI. Like is there a pickup somewhere that can be adjusted or moved with a special bracket?

  • peaceofwork

Posted January 14, 2014 - 09:36 PM

#2

could you not rotate the stator plate? may have to enlarge the mounting bolt holes



  • Yammer-Hammer

Posted January 14, 2014 - 09:40 PM

#3

Is there a magnetic pickup on the stator? And yea that could work, just elongate the stator plate mounting holes in the mill

Edited by Yammer-Hammer, January 14, 2014 - 09:41 PM.


Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • jojo1224

Posted January 14, 2014 - 11:10 PM

#4

Yes there is a pickup mounted on the stator plate, elongate the holes and rotate the stator plate. What is the project?



  • Yammer-Hammer

Posted January 14, 2014 - 11:23 PM

#5

Getting a 16:1 high compression piston made by the engine builder at work for it, or whatever to get the most highest CR and still maintain safe PTV and PTH clearances. And going to be running it on methanol but need to advance timing because methanol has a slower burn rate so need to advance to really get the full power potential.

Edited by Yammer-Hammer, January 14, 2014 - 11:58 PM.


  • jojo1224

Posted January 14, 2014 - 11:54 PM

#6

Sounds fun, Stock bore and stroke? It won't be easy to get the compression ratio that high.

  • Yammer-Hammer

Posted January 15, 2014 - 12:00 AM

#7

jojo1224, on Yesterday, 11:54 PM, said:
Sounds fun, Stock bore and stroke? It won't be easy to get the compression ratio that high.

Stock stroke, but has a 95mm bore (426 cylinder) so basically its a 426. And no it wont, because we gotta keep safe PTV and PTH clearances. But it should flat out rippppp when its done

Edited by Yammer-Hammer, January 15, 2014 - 12:02 AM.






Related Content

Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 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
 
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.