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Power Valve cleaning
- '03 YZ 250
started by Rhythm
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December 17th 2009 at 10:28 AM
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Rhythm
Rhythm master
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137 Posts 
Group: Members
Member Since: July 5th 2008
Location: Porcupine Plain/Saskatoon, Saskatchewan, Canada
Current Dirtbike: '03 YZ 250
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I'm going to clean the power valve on my bike this winter.
Looking at the way everything is set up, do I have to pull the motor out to get it out or can I pull it with out pulling the motor?
'03 YZ 250
Tag bar clamps, titanium 200 foot pegs, Rental American Addition bars, RG3 suspenion, Hotwheels graphics, Griper seat cover, and Carlsbad tires.
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December 17th 2009 at 5:03 PM
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DarksideCR
My givadamn broke and I aint fucking fixing it!
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341 Posts
Group: Members
Member Since: July 4th 2008
Location: Kirkland lake, ONTARIO, Canada
Current Dirtbike: 2000 CR250R
Sponsors: Vortex
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Depends how much room you have to work with. Make sure there ajusted right also. Take pictures.
The honda revolution continues!
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December 17th 2009 at 6:57 PM
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Kawi_Rider_316
Team Not Even Scared
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632 Posts 
Group: Members
Member Since: July 11th 2008
Location: Ocheyedan, Ia, USA
Current Dirtbike: Kx 250F
Race Number: 316
Sponsors: Spencer Motorsports
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Shouldnt have to. Never did on Kawi's
"Jump for show, Corner for dough"
"In ball and stick sports they give you the balls, In Motocross you have to bring your own"
Sponsors:
Glens Sport Center, FC MODS, MSR, Sunline, Tag, Filtron, Six Six One, Steel Mx, Dunlop,
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December 17th 2009 at 7:30 PM
[ Modified December 17th 2009 at 7:32 PM
]
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MX86
What's this button do?
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757 Posts 
Group: Moderators
Member Since: June 5th 2008
Location: Nashwauk, MN, USA
Current Dirtbike: 2006 Yamaha yz250
Race Number: 86
Sponsors: X-Brand, Gravity Worx
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You can do it with the motor in, however i recommend pulling the motor. there are 3 (sections) of the powervalve system.
1 Guillotine that is the main part of the PV system
and
2 sliders that get pushed open as you reach max RPM opening the exhaust ports completely.
the whole system runs on a rod running the length of the PV cover. that has 2 clips (hex headed screws holding them in) and 4 springs, along with 2 arms that run the sliders.
maybe it's 3 springs, i dunno been a while since i've cleaned the PV on my bike
Living Life 1 berm at a time.
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December 17th 2009 at 7:51 PM
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Rhythm
Rhythm master
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137 Posts
Group: Members
Member Since: July 5th 2008
Location: Porcupine Plain/Saskatoon, Saskatchewan, Canada
Current Dirtbike: '03 YZ 250
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Thanks guys.
I'll look into it when I get home on the weekend and see if I can get it out with the motor still in, and if not I'll just pull it out.
What all do I need for gaskets? or are there any for this bike?
This is my first bike with a power valve so I don't know to much about it yet, other then how it basically works.
'03 YZ 250
Tag bar clamps, titanium 200 foot pegs, Rental American Addition bars, RG3 suspenion, Hotwheels graphics, Griper seat cover, and Carlsbad tires.
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December 17th 2009 at 8:14 PM
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MX86
What's this button do?
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757 Posts
Group: Moderators
Member Since: June 5th 2008
Location: Nashwauk, MN, USA
Current Dirtbike: 2006 Yamaha yz250
Race Number: 86
Sponsors: X-Brand, Gravity Worx
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Just one on the cover, which if you careful you can just reuse.
Living Life 1 berm at a time.
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December 17th 2009 at 10:01 PM
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Rhythm
Rhythm master
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137 Posts
Group: Members
Member Since: July 5th 2008
Location: Porcupine Plain/Saskatoon, Saskatchewan, Canada
Current Dirtbike: '03 YZ 250
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O good, makes things a little easier and cheaper.
'03 YZ 250
Tag bar clamps, titanium 200 foot pegs, Rental American Addition bars, RG3 suspenion, Hotwheels graphics, Griper seat cover, and Carlsbad tires.
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