2008 WR450F with 2006 YZ suspension and cams


219 replies to this topic
  • Parx_400

Posted June 14, 2013 - 06:38 AM


You have very nice toys,

Do you plan to rejet with the Dyna for the more advanced maps? If so how much?

  • Krannie McKranface

Posted June 14, 2013 - 04:02 PM


You have very nice toys,

Do you plan to rejet with the Dyna for the more advanced maps? If so how much?


There should be no reason to re-jet, unless it was wrong to begin with.
All you are doing is changing spark advance curve.

  • Krannie McKranface

Posted June 17, 2013 - 05:02 AM


MORE UPDATES SOON.
I NEED TO RIDE THIS THING MORE THAN ONCE EVERY TWO MONTHS!!!!

I need it to accelerate, suspend, and do other super-cool stuff, reasonably well......first....

  • gcally

Posted June 18, 2013 - 06:59 AM


What fork height above top triple did you find works best with the YZ forks?

Are they the same length as the WR forks? I thought I read that they are a couple mm shorter.

I am picking up my 07 YZ forks and WR shock from Pro-Action today.
I had them do the works I even opted for their piston in the rear shock. I figured I was already spending the cash so why not.
I am lucky that their original HQ is literally only 5 miles from my house. I can have them rework the forks and shock if I do not like the feel.

  • Krannie McKranface

Posted June 18, 2013 - 01:04 PM


What fork height above top triple did you find works best with the YZ forks?

Are they the same length as the WR forks? I thought I read that they are a couple mm shorter.

I am picking up my 07 YZ forks and WR shock from Pro-Action today.
I had them do the works I even opted for their piston in the rear shock. I figured I was already spending the cash so why not.
I am lucky that their original HQ is literally only 5 miles from my house. I can have them rework the forks and shock if I do not like the feel.


Those are questions of personal preference.
I am 6'4" 240lbs so my recommendations don't work too well for most riders.

  • Krannie McKranface

Posted June 18, 2013 - 01:07 PM


OK, so fork stiction mystery solved;

- cheap-ass no-name bushings and seals were used by the previous tuner.
Even with the oil out of the forks, you could not move the forks with one hand....

We will put in SKF seals and bushings, and that will be that, along with some minor valving changes.

Next is the front wheel repair, taller seat, Dynatex plug-in, and then, FINALLY, another test ride.

  • kawi380

Posted June 18, 2013 - 01:35 PM


Man, you really are stringing us along here. I'm not sure I believe it will ever be ready :p

  • Krannie McKranface

Posted June 18, 2013 - 03:00 PM


Man, you really are stringing us along here. I'm not sure I believe it will ever be ready :p



That's cause there really is no bike.

CGI, all of it.

  • KennyMc

Posted June 18, 2013 - 06:14 PM


Man, you really are stringing us along here. I'm not sure I believe it will ever be ready :p


It will be, but then he will sell it :p

  • gcally

Posted June 20, 2013 - 05:58 PM


Those are questions of personal preference.
I am 6'4" 240lbs so my recommendations don't work too well for most riders.


Do you know if the YZ forks are the same length as the WR forks?

I want to start with the stock WR geometry flush with the fork tube.
My WR forks are sitting at my brothers shop boxed up and ready to sell and I forgot to measure the length.

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

Posted June 20, 2013 - 06:20 PM


Do you know if the YZ forks are the same length as the WR forks?

I want to start with the stock WR geometry flush with the fork tube.
My WR forks are sitting at my brothers shop boxed up and ready to sell and I forgot to measure the length.


I'm not sure

  • Krannie McKranface

Posted June 21, 2013 - 06:35 PM


UPDATE:

As mentioned many times here, the flat spot after adding the cams was intolerable.
Bad ignition? TPS? coil? Carb?

What the Fork !!!!

Well, it turned out to be a combination of things:

- TPS: way out at full throttle; now corrected
- Ignition (stock): no working map #2, so it was slow. The Dynatek improved that problem; now it has more throttle response and very little flat spot.
- But the main culprit was the AIR CUT VALVE: it has supposedly been modified already, but it was done wrong!
I took the spring out, took out the blockage in the passage (100 air screw already in there), and Bingo.......much better running at 1/8 to 3/4 throttle

So now, I can put back the NCVS needle, and the flat spot should be GONE FOREVER.....

Oh, and there will be an update on the re-re-re-valving and re-re-springing of the suspension.
This time I had STERIC RACING do the suspension, and I am trying it out tomorrow.

MAN 'O MAN, do I not want to go through that tuning nightmare again.........

  • Krannie McKranface

Posted June 22, 2013 - 01:07 PM


Steric Racing Suspension works well.
Today's ride went well, even if the power is still not right. Still peaky.
32 miles of very fast very rough hard-as-rocks dirt.
Combined with the Bridgestone M403 90/100 front tire, this thing is sooo easy to ride.

Posted Image


After the ride I modifed air-cut valve even further: removed spring and diaphragm and made full gasket to block everything.
Still with 100 air jet, and changed to JD Red needle (#5).

Tiny bit better, but still sluggish at 1/4 throttle and up at low rpms.

Can't figure it out..........

At this point, I ready to put in the stock cams.......

Edited by Krannie, June 22, 2013 - 01:08 PM.


  • WRDL

Posted June 23, 2013 - 11:47 PM


Hey Krannie I see a lot of guys using ® and (s) diameter needles could not find any succes with these leaner needles
With more than 12 months on and off playing with the jetting changing pilot air jets ,mains pilots you name it ,Ihave come up with a great combo which might help you out.
WR450 2007
EX.cam mod
GYTR pipe
42 pilot
75 pilot air
NFPR needle 4 th clip (YZ 250 F NEEDLE)
165 Main
Coaster enrichner valve intacked and working
Tan colour spark plug
14 kms to the lite
SEA LEVEL
The (P) L1 is the same as the JD needle

  • Krannie McKranface

Posted June 24, 2013 - 05:15 AM


Hey Krannie I see a lot of guys using ® and (s) diameter needles could not find any succes with these leaner needles
With more than 12 months on and off playing with the jetting changing pilot air jets ,mains pilots you name it ,Ihave come up with a great combo which might help you out.
WR450 2007
EX.cam mod
GYTR pipe
42 pilot
75 pilot air
NFPR needle 4 th clip (YZ 250 F NEEDLE)
165 Main
Coaster enrichner valve intacked and working
Tan colour spark plug
14 kms to the lite
SEA LEVEL
The (P) L1 is the same as the JD needle


Did you keep the stock 75 pilot air jet?

Oops just saw it.

Edited by Krannie, June 24, 2013 - 05:15 AM.


  • n16ht5

Posted June 24, 2013 - 07:09 AM


don't go back to stock cams! mine pulls harder with the yz timing even down low. I wish I could remember all my jetting sizes..

That M403 looks really attractive.. have you run it before:?"

  • Krannie McKranface

Posted June 24, 2013 - 03:18 PM


Yeah, but I'm not using 'yz timing', cause you can't do that with the post 2003 motors.
I have YZ hotcams made for the WR.

The M403 went on my CRFR last weekend and I loved it so much, I ripped the MX51 off the WR and put on the 403. Fantastic tire, period.

  • Krannie McKranface

Posted June 24, 2013 - 06:20 PM


OK, tried the NFPR needle today, with positive results.
Less of a flat spot at lower rpms (3500-5000) with no change anywhere else.
It seems that if I keep the throttle to 1/2 or less, it runs quite well, and quite quick.
If I grab for more throttle, it does not change, just more intake honk, until it gets up to about 6500rpm, then it takes off.

Now I'm thinking my main is too small?

I've never had this kind of issue....

  • WRDL

Posted June 24, 2013 - 10:40 PM


Sorry Krannie I made a huge error , the needle im using is a NFPN not a NFPR will richen up the bottom and get ridof the flat spot

  • Krannie McKranface

Posted June 25, 2013 - 04:34 AM


Sorry Krannie I made a huge error , the needle im using is a NFPN not a NFPR will richen up the bottom and get ridof the flat spot


You owe me $21.00 :naughty:[size=4] [/size] :foul: :banghead: :rant: :smashpc:
[size=4] [/size]
:smashpc:
[size=4] [/size]
[size=4] :banghead:[/size]




 
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