How much fork oil?

[cay]

Hi folks.

Fork oil comes in 1 L bottles -- when replacing stock springs with progressives, will one bottle of fork oil do me, or do I need two?  I've looked all over -- I had high hopes for alexey's Changing Fork Seals how-to, but no luck.  

The closest thing to an answer I've found was at pantablo's progressive fork springs how-to which says that the syringe 'needs to hold about a pint when full so the job wont take too long.'  

Does this mean that there's around 1 pint (0.5 L) in each tube, with stock springs?  I'd guess that I'd need less fork oil with the progressive springs, 'cause the tighter coils should take up more volume in the bottom of the forks -- but what about the stock spacers?  If they're solid (and immersed in oil) then the stock springs + spacers would require less fork oil than progressives + PVC end caps.

Any help would be much appreciated.

C

[scratch]

You will need 350cc's, or ml's, for each fork leg.

[stevemac12073]

one bottle will do it. forks compressed no springs in them 5.5 in from top.

[Frost]

can anyone tell me what's the 15wt fork level with progressive springs...

springs installed and forks not compressed?

[werase643]

pull the springs and measure it like your supposed to.....

that is not a normal way of measuring....therefore no data available

unless you want to start a new data base... :mrgreen:

[Frost]

so what's the RIGHT way

[Frost]

so what is the correct way?

[stevemac12073]

one bottle will do it. forks compressed no springs in them 5.5 in from top.

that's the right way

[Dandy D]

Well I understand Frost's question. I changed my springs "the lazy way" according to Pentablo's webpage. Frost's question is valid for lazy a**es like myself who pull the stock springs and just replace with progressives.

But to give myself (us) a little more credit, I don't have a full set-up in my garage to be wrenching my bike very much. For instance, with the front wheel still attached, I can't compress the forks without possibly dropping the bike 'on its face' so-to-speak, since you have to have both springs out to compress them. The one-at-a-time spring change method per the lazy way prevents the compression of the front end. Unless there's something I'm missing here. (help?)
So the next time someone pulls apart the forks could they actually measure from the top of the forks to the oil level with the forks NOT compressed after setting the level properly. That should work the same as if compressed - just a different (larger) number and all of us with limited garage facilities would be very grateful.
BTW, besides a stiffer front end, what could happen if the fork oil is not adjusted? Will the seals blow out?
Now I'm worried.
Dandy D

[Frost]

i think if you put too much oil...fork seals will literally blow...and too little oil will be too weak...

i followed the instruction that came with it...it says to put the spring in the fork tube uncompressed...and fill oil till it's MAX 140mm from the top...so that's why i was wondering

[Dandy D]

I'll have to check the paperwork again tomorrow. I thought the level was to be measured with the forks 'compressed'. I couldn't do that, so I didn't.
Dandy D

[werase643]

fix for the LAZY

put bike on center stand
put jack under engine
remove springs
raise front wheel with blocks
until forks are compresses
measure/add/remove/oil
remove blocks
add springs
remove jack

if i'm going to the trouble....i'm changing the fork oil
it's cheap and will make a diff
stock is.....10W(i think) and i'd use 20W