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Old 07-18-2013, 11:52 AM   #3961
racergirl479
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Location: Murfreesboro Tn
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Quote:
Originally Posted by michael1968 View Post
I went with 7.5w with the standard valving, it works well.

Ok, I think I will go with a 5w and see how it does on my trip in august. If I think I need to go heavier, I will change it after the trip and see how It does. The only option I had a my shop was 5, 10, and 15 so id rather start out a little light than go to heavy.
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Old 07-18-2013, 12:55 PM   #3962
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Quote:
Originally Posted by racergirl479 View Post
Ok, I think I will go with a 5w and see how it does on my trip in august. If I think I need to go heavier, I will change it after the trip and see how It does. The only option I had a my shop was 5, 10, and 15 so id rather start out a little light than go to heavy.
FYI, you can mix equal parts of 5w and 10w to make 7.5w, if you have both on hand.
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Old 07-18-2013, 01:13 PM   #3963
racergirl479
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Quote:
Originally Posted by GSBS View Post
FYI, you can mix equal parts of 5w and 10w to make 7.5w, if you have both on hand.
will keep that in mind! what did you use in yours?
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Old 07-18-2013, 01:18 PM   #3964
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Quote:
Originally Posted by racergirl479 View Post
will keep that in mind! what did you use in yours?
The PO had already put stiffer springs and seals, new fork oil, when I got mine, so I'm not sure. It handled like I wanted once I got it put together so I haven't messed with it. It's coming up on time to change the fork oil (15K miles) since I did the conversion, so I guess I'll go with 7.5w and see if I like it.

And I already have both 5w and 10w on the shelf.
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Old 07-18-2013, 04:15 PM   #3965
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Side Note: Different brand fork oils have different viscocities. One company's 5wt might be thicker than another brand of 10 wt.

Every tuner I have talked to says the same thing. It doesn't matter what you use. Different people have their favorite brands but it is important that once you find something you like you stick with that brand because as you change weight oil it will be consistent in that brand. Changing to another brand may not get you thicker or thinner oil as desired.

Lot of info on the interwebs about this....
http://www.peterverdone.com/wiki/ind...spension_Fluid
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Old 07-18-2013, 09:15 PM   #3966
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Gangplank is correct, the EU ISO VG is the way to rate the fluid but we all have that SAE rating ingrained, I put a lot of the info together onto a page http://www.f650gs.crossroadz.com.au/CalcFluidInfo.html

In terms of cartridge forks, if they feel a bit loose then diving to the heavier fluid is not the answer as the damping is adjustable through the shim changes
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Old 07-19-2013, 02:31 AM   #3967
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Forks

Hi All ,

Bit of a cheeky thread hijack - I'm an interloper from the Yamaha TT 600 Thread ! Fitted WR Forks to my TT and have a KTM Low Fender I want to fit - does someone on here (an inmate) make the brackets ? I have tried to trawl this thread but it's massive , so could someone point me in the right direction and then I'll leave you alone ! Thanks in advance .Glenn
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panterg55 screwed with this post 07-19-2013 at 02:32 AM Reason: spelling !
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Old 07-20-2013, 09:28 PM   #3968
racergirl479
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Alright i think im going with the 7.5 ill mix the 5 and 10 together.

Just wondering what technique yall have used to fill the forks with oil. Some say to fill it to the top while compressed, pump the damper rod, then fill the rest of the way up... I have heard others say fill it all the way up, pump with damper rod, add more, pump again, then take the excess out with a turkey baster till it goes down to a certain point...?
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Old 07-20-2013, 09:38 PM   #3969
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My progress for tonight...
got the rest of the front apart... cleaning parts, steering head bearings all fit, starting to put the new forks together...



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Old 07-20-2013, 09:58 PM   #3970
WayneC1
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Stick with the standard fluid spec first time round, these are cartridge forks and damping adjustment is done with shim changes.
Look at info on fluids as well, the variations in viscosity between SAE rated fluids from different manufacturers is large and the SAE system is not a good guide or measure for suspension fluids, the ISO VG rating is the one to use http://www.f650gs.crossroadz.com.au/CalcFluidInfo.html
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Old 07-21-2013, 07:41 AM   #3971
Lupin 3rd
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Quote:
Originally Posted by racergirl479 View Post
Hey Marisa, do you have bump stops under your top caps? Seems like some forks have them and some don't. I disassembled my forks yesterday and found that one of them is cracked.



By the way this is what was sitting in my fork lowers, right around the cartridge.


Next time I buy used forks I'll make sure to take the time and service them, that stuff looks nasty!
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Old 07-21-2013, 07:53 AM   #3972
WayneC1
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The bump stop is shown in the parts system as fitting on top of the damper tube below the spring guide, I posted re costs of replacement from the EU distributor of KYB parts earlier in the thread

They had them in stock, the catalogue is here http://www.technical-touch.com/index.php?id=downloads

And yes the catalog does not show them used on YZ but I suspect they are on some of the road/trail models with 20mm less travel
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Old 07-21-2013, 10:17 AM   #3973
Barnman
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Quote:
Originally Posted by racergirl479 View Post
.....
Just wondering what technique yall have used to fill the forks with oil. .....
Straight copy and paste from the Yamaha manual. Hope it helps.

Compress the front fork fully.
15. Fill:
Front fork oil
Until outer tube top surface with recommended
fork oil 1.

16. After filling, pump the damper rod 1
slowly up and down more than 10 times
to distribute the fork oil.

17. Fill:
Front fork oil
Until outer tube top surface with recommended
fork oil once more.

18. After filling, pump the outer tube 1 slowly
up and down (about 200 mm (7.9 in)
stroke) to distribute the fork oil once
more.
NOTE:
Be careful not to excessive full stroke. A stroke
of 200 mm (7.9 in) or more will cause air to
enter. In this case, repeat the steps 15 to 18.

19. Wait ten minutes until the air bubbles
have been removed from the front fork,
and the oil has dispense evenly in system
before setting recommended oil level.
NOTE:
Fill with the fork oil up to the top end of the
outer tube, or the fork oil will not spread over to
every part of the front forks, thus making it
impossible to obtain the correct level.
Be sure to fill with the fork oil up to the top of
the outer tube and bleed the front forks.

20. Measure:
Oil level (left and right) a
Out of specification → Adjust.

Standard oil level:
135 mm (5.31 in)
Extent of adjustment:
80 ~ 150 mm (3.15 ~ 5.91 in)
From top of outer tube with
inner tube and damper rod 1
fully compressed without
spring.

NOTE:
Be sure to install the spring guide 2 when
checking the oil level.
WARNING
Never fail to make the oil level adjustment
between the maximum and minimum level
and always adjust each front fork to the
same setting. Uneven adjustment can
cause poor handling and loss of stability.
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Old 07-21-2013, 11:28 AM   #3974
panterg55
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forks

Bit of a cheeky thread hijack - I'm an interloper from the Yamaha TT 600 Thread ! Fitted WR Forks to my TT and have a KTM Low Fender I want to fit - does someone on here (an inmate) make the brackets ? I have tried to trawl this thread but it's massive , so could someone point me in the right direction and then I'll leave you alone ! Thanks in advance .

if i said I used to have 650 Dakar would someone reply to my question ? Glenn
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Old 07-21-2013, 03:57 PM   #3975
racergirl479
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yep i have bumpers, they are in good shape.

Forks are back together minus oil... one of them fits snug together, no lateral movement, and the other seems loose... What could cause this?

Oh and does anyone have pictures of their steering head before the top clamp is added, i seem to have a tad extra space. Is there a spacer needed? i have forks from an 03, and thought it should bolt right up.
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