yz timing

5 replies to this topic
  • mdek

Posted February 22, 2001 - 06:18 PM


where would I find info on how to yz time my 2000 wr400. also do you need to change the jetting. I already tried to search but it did not come up with anything



  • Guest_Guest_*

Posted February 22, 2001 - 06:39 PM


Mark, in the technical section I believe there is a link to yz cam timing instructions that are very straight forward. I just did mine and changed from stock jetting to DVP needle #4, 180 main and kept 45 pilot. Works great so far.

  • Shane

Posted February 23, 2001 - 09:36 AM


question guys.... on this yz timing mod...iam definently going to do this... do you need any new gaskets? for this mod? or anything other than what those instructions say.... i dont want to tear my bike down and then find out on a saturday night that i cant put it back togather due to not having a gasket or some little part that was not mentioned..... once i get this answer iam going to change immediatly....

sane shane

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  • ButtonFly

Posted February 23, 2001 - 10:23 PM


You won't need any gasket parts, or engine parts, but you will probably need jets. Quite a few. I have taken the lid off the check the valve clearances, and I will be retiming mine sometime REALLY soon as well (waiting for parts in mail). I bought a DVP needle, a 100 PAJ, and a 48 PJ. I am already running a 175 main. That should get me close... if you have the jetting stuff go for it.

  • Guest_Guest_*

Posted February 23, 2001 - 10:28 PM


How does the YZ timing effect the low end?
Mid range? Top end?

  • bonez34

Posted February 23, 2001 - 07:19 PM


with my 2000 wr it opened up a whole bag of whoop-ass in the mid and upper rpm's. the low end felt about the same, maybe a little more power but nothing to write hame about. i ride mostly trails and it did make it a bit more of a handful in the tight stuff but when the trail opens up i am very glad i did it :). it definetly gives at least 3-5 hp but it felt like 5! bonez


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