What does a WR motor rev to?


12 replies to this topic
  • marcoma

Posted January 10, 2007 - 11:01 PM

#1

Hey All

I just bought a Vapor trail computer for my WR and I need to set the upper rpm warning light. Does anyone know what a free modded WR revs to? I dont even know if it has a rev limiter and what its set at......

One more Vapor related question - what should I set the PPR to? The manual says it should be 1 for four stroke and 1 for a two stroke......that dont sound right!

Cheers

  • hondacrf150f1

Posted January 11, 2007 - 06:14 AM

#2

11K RPM redline...All the WR's come with rev limiters im pritty sure...

  • marcoma

Posted January 11, 2007 - 08:50 AM

#3

Kewl - thanks

MM:applause:

  • MountainMax

Posted January 13, 2007 - 07:26 AM

#4

That's one of the reasons I bought a Vapor, to get a tach, I like knowing what rpm's my bike is at, but yeah they do limit themselves using the cdi, but it's still nice to get a warning just before.......

  • steve lemley

Posted January 13, 2007 - 01:53 PM

#5

If I could just find a store that carries the vapor internal battery, I could see my tach again to confirm the 11k ;(

  • BIG HAL

Posted January 14, 2007 - 06:03 AM

#6

That's one of the reasons I bought a Vapor, to get a tach, I like knowing what rpm's my bike is at, but yeah they do limit themselves using the cdi, but it's still nice to get a warning just before.......


How in the world do you have time to watch your tach while your racin???

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  • Sun

Posted January 14, 2007 - 06:10 AM

#7

11K RPM redline...All the WR's come with rev limiters im pritty sure...

MY FRIEND JSUT GOT THE 07 WR450. AND IT SEEMS LIKE THERE IS A GOVENOR ON THE THROTTLE. IS THAT POSSIBLE? IT DOESNT TURN NEAR AS FAR AS HIS OTHER BIKE (OLD KX), OR MY HONDA.

  • Fullbore4

Posted January 14, 2007 - 06:19 AM

#8

Hey All

I just bought a Vapor trail computer for my WR and I need to set the upper rpm warning light. Does anyone know what a free modded WR revs to? I dont even know if it has a rev limiter and what its set at......

One more Vapor related question - what should I set the PPR to? The manual says it should be 1 for four stroke and 1 for a two stroke......that dont sound right!

Cheers


Is PPR suppose to be set to 1.0? I'm wondering too if that is a misprint in the book.

Sun, WR's come with a throttle stop that cuts throttle movement to about 1/2 that of a yz. Most cut that stop down first thing.

  • Andy - j

Posted January 14, 2007 - 09:06 AM

#9

MY FRIEND JSUT GOT THE 07 WR450. AND IT SEEMS LIKE THERE IS A GOVENOR ON THE THROTTLE. IS THAT POSSIBLE? IT DOESNT TURN NEAR AS FAR AS HIS OTHER BIKE (OLD KX), OR MY HONDA.

My wr450 f 04 came with a small packet containg carb jets and a shorter throtle stop screw with alan key head, remove the long stop screw and replace it with shorter one or cut it down. My bike was a Spanish import
whitch i was not told at the time of purchase, all bikes 250 and over are restricted for the Spanish market. I had to carry out the mods my self
whitch included rejetting as the bike was so weak it would not tick over
and ran very uneven. I did not purchase the bike from a off road dealer
and will ask more questions before a future buy. Andy - j

  • marcoma

Posted January 15, 2007 - 07:25 PM

#10

[quote name='Fullbore4']Is PPR suppose to be set to 1.0? I'm wondering too if that is a misprint in the book.

QUOTE]

Yeah - that threw me too but I left it at 1 and it works just fine.

  • Kyle Prior

Posted January 16, 2007 - 11:10 AM

#11

The best thing to would would be to figure out where the peak power is, and set the RPM light right after that, even if its at 10k. If the peak power is at 11k, then set it there.

  • OneToGo

Posted January 21, 2007 - 09:17 AM

#12

Hey All

I just bought a Vapor trail computer for my WR and I need to set the upper rpm warning light. Does anyone know what a free modded WR revs to? I dont even know if it has a rev limiter and what its set at......


Cheers


FYI, Yamaha OEM CDI on 03-06 WRs are programmed for 10800 RPM limit.
The only way to increase it is to change the CDI for something like a Vortex. Race teams use these CDIs which have a default limit of 11700RPM.

Looking at the power and torque curves on various dyno graphs for dirt bikes show most high performance singles (450s) produce maximum power somewhere between 8000-9500, WR included.
:lol:

  • marcoma

Posted January 22, 2007 - 10:31 PM

#13

FYI, Yamaha OEM CDI on 03-06 WRs are programmed for 10800 RPM limit.
The only way to increase it is to change the CDI for something like a Vortex. Race teams use these CDIs which have a default limit of 11700RPM.

Looking at the power and torque curves on various dyno graphs for dirt bikes show most high performance singles (450s) produce maximum power somewhere between 8000-9500, WR included.
:lol:


How right you are! I nailed mine to the rev limiter and the Vapor showed a maximum rpm of 10,840. Good to know.

And if anyone ever wondered, it showed a maximum speed of 89.4 mph with stock gearing at this rpm.

Sorted!:confused:




 
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