Fork oil height in a Wee2 - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 12 Old 08-29-2012, 03:36 AM Thread Starter
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Fork oil height in a Wee2

I'm about to install Intiminators in the Wee2.
Doing a search for oil level got me 150mm(5.9") down to 5.25" down.Anyone know for sure what is the standard level.
Thanks, Macca
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post #2 of 12 Old 08-29-2012, 04:13 AM
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It was 175mm down when I replaced most (*) of the oil on mine. That's after removing the springs and a bit of spillage. Not sure if the spillage amounted to a couple of cm, but - maybe.

Set it to 165 when I refilled and it's good, sorry, can't do better than that.

Pete

*) Most, I'm too lazy to disassemble the front end so I just suck what I can reach out the top and redo it every year - seems to work.
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post #3 of 12 Old 08-29-2012, 06:42 AM
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150mm is right.

-Tom (DL650AL2) (KA1TOX) (E-I-E-I-O)

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post #4 of 12 Old 08-29-2012, 04:58 PM Thread Starter
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Originally Posted by tmcgee View Post
150mm is right.
Thanks mate.
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post #5 of 12 Old 08-29-2012, 09:38 PM
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I was a bit surprised by this, so will point it out:

My understanding is that the 150mm is measured with the fork tubes off the bike, collapsed, and empty (springs, spacers, washers NOT in the fork). That's how I did it, anyway.

If they're still on the bike (not collapsed), a/o the springs are still in them displacing oil volume, that number will be different. What it will be, I don't know.

IIRC, on other bikes I've owned (I've changed fork springs on all of them), there was one number for doing it "on the bike" and a different number "off the bike" (springs removed, collapsed). My memory is notoriously crap, tho, sorry.
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post #6 of 12 Old 08-29-2012, 11:39 PM
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Originally Posted by phoenixsteve View Post
I was a bit surprised by this, so will point it out:

My understanding is that the 150mm is measured with the fork tubes off the bike, collapsed, and empty (springs, spacers, washers NOT in the fork). That's how I did it, anyway.

If they're still on the bike (not collapsed), a/o the springs are still in them displacing oil volume, that number will be different. What it will be, I don't know.

IIRC, on other bikes I've owned (I've changed fork springs on all of them), there was one number for doing it "on the bike" and a different number "off the bike" (springs removed, collapsed). My memory is notoriously crap, tho, sorry.
I agree with your reasoning there but: What I actually measured was 175mm, springs out, front collapsed ON the bike. And I don't think it'd be different with the forks unbolted, if anything it'd be lower. O.K. I lost some oil when I extracted the springs, but I doubt 2.5cm worth.

I'd be a bit careful about trusting figures from 'the book' here. Suzuki have been fairly lax in getting the documentation exactly right in the past and have obviously fiddled with the front suspension quite a bit to get the big improvement from earlier years.

I don't think 150mm can do any harm, but if you find it a bit harsh after reassembling and taking it for a ride, lowering the oil level a cm at a time (on the bike :P) may be a good place to start. I have a small hand transfer pump I got from the local auto-accessories store - makes that very easy.

I actually wrote the springs in/caps off/fully extended oil level on the triple clamp to make this easier for myself next oil change - and yes, it was a lot less than the one with the springs out and the front collapsed.

Pete

Last edited by PeteW; 08-30-2012 at 01:10 AM.
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post #7 of 12 Old 08-30-2012, 01:15 AM
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150mm is actually quite a general recommendation for 43mm forks. In any case, the air space only affects the last 40mm or so of travel anyway, so most of the time up to a limit, not much difference anyway.

if you run a softer spring, u might want to reduce the air-space a bit to ramp up the damping a bit before full compression.

Yes suzuki was not every accurate with the figures on pre-l2 bikes - my k8's measured fork travel is only 140mm - hopefully L2 is close to the 150mm spec (or whatever spec it is now)

L2 Glee;

K8 Wee ABS(SOLD);

SOLD: 06 FZ1; 04 Fireblade; 02 Fireblade; 97 CBR 600
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post #8 of 12 Old 08-30-2012, 07:09 AM
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Pete: I wish I'd had the presence of mind to measure my factory set-up before taking it all apart, but I didn't.

OP: I'm certainly no expert on this - I read about the 150mm and the measurement conditions here (and elsewhere), so that's what I did. That recommendation didn't come from Suzuki and I made no effort to check/ reproduce the amount the factory had installed.

I changed spring rate, I changed from a progressive (factory) to a straight rate spring, I changed oil weight, and (likely) air space all at the same time. There's no way I can tweeze out the effect of one change vs. the others in handling. It is definitely stiffer (spring rate), it is definitely harsher (straight rate vs. progressive?, oil weight?, air space?)
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post #9 of 12 Old 08-30-2012, 11:44 AM
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"check/ reproduce the amount the factory had installed."

Doh, now that's a bit of sensibility to remember. I need to do my forks and measuring the one that doesn't leak before I dismantle it would be genius.
Thanks for the good idea!
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post #10 of 12 Old 08-30-2012, 01:48 PM
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Quote:
Originally Posted by notacop View Post
"check/ reproduce the amount the factory had installed."

Doh, now that's a bit of sensibility to remember. I need to do my forks and measuring the one that doesn't leak before I dismantle it would be genius.
Thanks for the good idea!
That assumes it was correct from the factory. It often isn't.

Rich Desmond
'07 DL650, '01 DR-Z400S, '99 SV650 (race bike), '80 GS1000S, '85 RZ350, '08 Ducati 848
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