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What is the purpose of the Cam Mod? Do you do it with the stock cams? I have a bone stock YFZ that almost dies when I jab the throttle and I have heard that this will fix it. Is this true? I figure that I need to check the vales for the first time it woudl be a good time to do this mod. Do most dealers keep the spacers in stock? Is there anywhere that I can get the manual for free online? Sorry for all of the questions I looked at daddog's site last night and it has a lot of helpful information but obviously I have some additional questions. The video's are great!!! Thanks daddog!!!
 

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the most likely reason the bike stumbles at the bottom is that it is usually quite lean from the factory. richen up the pilot and the main. Most people are going to around a 45 pilot and a 165 main. this is a good place to start. Also you may want to remove the filter box lid and remove the spark arrestor. Also there is some pretty good info at this site http://www.eskimo.com/~daddog/

This may be of some help also

"This is a pretty basic outline for jetting on the YFZ450. These settings are for sea level if you are anywhere from 1500ft to sea level these settings should be very close to right on. Anything above 1500ft should lean the settings accordingly. Also, as a good adjustment you should raise the idle rougly 10 steps on the knob. The dealers set the idle way too low and that is a big cause for stalling these things.

Stock YFZ off the showroom floor: 158 main 42 pilot #3 clip on needle 2 turns mixture
Stock YFZ with a much needed re-jet: 168 m 45p #4 clip 2 turns mciture
YFZ w/baffle out: same as above
YFZ w/baffle out and lid off: #5 or #6 clip same settings as above.
YFZ wpipe and lid on: 168m 45p #5 or #6 clip should be very close

Now, for this next set of jetting you will need to buy either a James Dean jet kit(www.jdjetting.com) or a GYTR jetting kit from your local dealer.

YFZ w/pipe and lid off: GYTR needle #4 clip 168m 45p 2.5 turns mixture screw.
YFZ w/pipe and lid off: JD blue needle #3 168m 45p 2.5 turns mixture screw.

The above settings are somewhat rich but this engine craves tons of fuel and tons of air to make big HP. I have yet to foul a plug running the JD Jetting settings on my YFZ with a Sparks pipe and the YZ exhaust cam. Also all the pipes out for the YFZ are going to be pretty close to the same jetting-wise so this FAQ should get you pretty close. Again, these settings cannot be a for sure thing across the board but these are VERY close guidelines that you can use to get your YFZ450 to run like it should. I hope this helps get rid of some of the jetting posts that we see everyday. If you have any questions about how to alter your jetting to dial it in exactly please ask the questions here so that we can all learn from your testing.
Thank you,
Isaac"

As for the cammod
from what I know about the cammod is, is that it basically will set your exhaust cam to the timing of the yz450 dirtbike. This gives some good increased in top end power and from what I have noticed very little change in the bottom end.
 

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Originally posted by XVIZIS@Mar 10 2004, 09:47 PM
This has helped me out as well. Thanx!
How much are the kits?
The cam mod kit?

Dude they are hella expensive.
 

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smart arse :lol
 
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