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.


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  • 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.






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