Hopping Up a yamaha wr450???


44 replies to this topic
  • ShadyatBest

Posted September 21, 2006 - 02:36 PM

#1

So here is the deal. My buddy has an '05 wr450 and he wants some more power. I told him a high compression piston,13:1, and a new cam should do it. Right now he has the white brothers e2 silencer and i think a powerbomb header.

So i spend all my time in the honda forum so forgive my ignorance. Over there we run je pistons and either hot cams, web cams, or ron hamp 187 cams. What will i need brand wise with these products? Will yz motor parts fit the wr?
Thanks for the help.

  • Alley Cat

Posted September 21, 2006 - 02:51 PM

#2

I don't think you will find a 13:1 comp piston for the YZ/WR's.

Big bore kit would be the most effective way of achieving more power.

  • ShadyatBest

Posted September 21, 2006 - 02:56 PM

#3

je pistons makes a 13.5:1. So any other suggestions

  • Numskull

Posted September 21, 2006 - 03:02 PM

#4

Im thinking of hopping my 426 up this winter. Hotcams, bigbore kit with 13.5:1, and port and polish the heads. :thumbsup:

  • Punisher660

Posted September 21, 2006 - 05:36 PM

#5

Assuming he has done all the free mods.....

I would swap in the hot cams and the 13:5:1 high compression piston.
I'm not sure if the HatCams have a WR cam, but if they do.....be sure to get the YZ cam.

You could also just swap in the YZ oem cam as well. My wr has all the free mods and a YZ cam.....thats it, and it has plenty of power. I'm 6'3" and 280lb - agressive intermediate, and for the most part, its all the power I can use.

The only time I have wished for more power is when riding the big sand hills.

  • Alley Cat

Posted September 21, 2006 - 06:40 PM

#6

I'm not sure if the HatCams have a WR cam, but if they do.....be sure to get the YZ cam.

Actually they make a WR specific ex cam and that's the one you want........

  • Few

Posted September 21, 2006 - 07:01 PM

#7

Oh Shady, Where the heck did you find somebody with the talent to out ride their modded WR? And here I was gonna ring the bell for school to start....
Rains are a coming, and work is a slowing. We will hook up soon bro!
PS. If she ain't leaking, don't bust her open. Ride like you stole it!

  • Alley Cat

Posted September 21, 2006 - 07:07 PM

#8

Oh Shady, Where the heck did you find somebody with the talent to out ride their modded WR? And here I was gonna ring the bell for school to start....
Rains are a coming, and work is a slowing. We will hook up soon bro!
PS. If she ain't leaking, don't bust her open. Ride like you stole it!

Just because you can't ride your stock WR450F, doesn't mean that everyone else is the same as you! :lame:

Maybe you should have got the WR250F? :thumbsup:

  • overrev

Posted September 22, 2006 - 05:19 AM

#9

the only thing that makes the hot cam "WR" specific is the decompression pin height
shorter pin for e-start
the lobe profile is the same as the YZ

  • ShadyatBest

Posted September 22, 2006 - 12:14 PM

#10

Oh Shady, Where the heck did you find somebody with the talent to out ride their modded WR? And here I was gonna ring the bell for school to start....
Rains are a coming, and work is a slowing. We will hook up soon bro!
PS. If she ain't leaking, don't bust her open. Ride like you stole it!

Seriously? The wr's are dogs. They need big time motor help.

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

Posted September 22, 2006 - 01:46 PM

#11

Go back to the honda forum :thumbsup: . If you ride an x and think the wr450's a dog, then you've ridden a very poorly tuned wr.

  • Alley Cat

Posted September 23, 2006 - 02:33 AM

#12

the only thing that makes the hot cam "WR" specific is the decompression pin height
shorter pin for e-start
the lobe profile is the same as the YZ

Yes, that's why he should get the WR specific cam, as I already said.............

  • ShadyatBest

Posted September 23, 2006 - 10:00 AM

#13

Go back to the honda forum :thumbsup: . If you ride an x and think the wr450's a dog, then you've ridden a very poorly tuned wr.

Shhhh. If you ever make it to northern cal we can trade bikes for a bit.

Anyways thanks for all the help. Do yz parts bolt onto a wr?

  • tony1970

Posted September 23, 2006 - 02:07 PM

#14

So here is the deal. My buddy has an '05 wr450 and he wants some more power. I told him a high compression piston,13:1, and a new cam should do it. Right now he has the white brothers e2 silencer and i think a powerbomb header.

So i spend all my time in the honda forum so forgive my ignorance. Over there we run je pistons and either hot cams, web cams, or ron hamp 187 cams. What will i need brand wise with these products? Will yz motor parts fit the wr?
Thanks for the help.

Is this the same Ginger Kid who took out a chunk of a tree not too long ago riding with you? :thumbsup: If it is, are you trying to knock him off and clear up the gene pool? Give the guy a break, or just shoot him outright and end the suffering. :lame:

  • tony1970

Posted September 23, 2006 - 02:12 PM

#15

Shhhh. If you ever make it to northern cal we can trade bikes for a bit.

Anyways thanks for all the help. Do yz parts bolt onto a wr?

YZ cams will make a big difference. Also some use a cams out of the YFZ 450 quad, but studies have shown that the bike will do more donuts in a staging area and the urge to drink and ride without a helmet goes up. :thumbsup:

  • MountainMax

Posted September 23, 2006 - 03:05 PM

#16

My WR is no Dog, I done the free mods and that alone was enough for me to out drag race a stock XR650 in 1/8 mile drag, and i can wheelie anytime up to 4th gear and his righ won't come up in 4'th at all and is reluctant in third, we swaped bikes and his XR felt like a dog, maybe your buddy still has the long restrictive throttle stop in there and she's only getting 1/2 throttle.......

  • tony1970

Posted September 23, 2006 - 03:20 PM

#17

My WR is no Dog, I done the free mods and that alone was enough for me to out drag race a stock XR650 in 1/8 mile drag, and i can wheelie anytime up to 4th gear and his righ won't come up in 4'th at all and is reluctant in third, we swaped bikes and his XR felt like a dog, maybe your buddy still has the long restrictive throttle stop in there and she's only getting 1/2 throttle.......

Give the Honda guys a break. They just have cam and valve envy. :thumbsup:

  • MountainMax

Posted September 23, 2006 - 05:55 PM

#18

what is this valve and cam problems everyone says about the Red Dogs???

  • ARin

Posted September 23, 2006 - 11:30 PM

#19

my wr pulls on my buddies x

hard.

  • JSanfilippo

Posted September 24, 2006 - 01:35 AM

#20

Me thinks shady's buddy's bike wasn't jetted for the mods it has.




 
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.