changing fork oil

[mobile mouse]

Hi,


Trying to change the fork oil quickly without removing them from the bike...
no oil leaks from seals


This is my thoughts..


Do one fork at a time


wind out pre load all the way
undo top yoke clamp
undo top bolt
raise front so front suspension fully extended and front wheel of ground
remove top bolt


Use:
http://www.ebay.co.uk/itm/Professional-Hand-Held-Diesel-Brake-Fluid-Vacuum-Pump-Bleeder-Kit-Set-Tester-New-/251200174323?pt=UK_Hand_Tools_Equipment&hash=item3a7cb278f3


with one of these attached to the end via short hose:
http://www.ebay.co.uk/itm/10-Stainless-Steel-Tubes-3mm-dia-x-0-25-wall-x-500-lg-/251534801707?pt=UK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET&hash=item3a90a47b2b


remove the spacers and washers and spring


use the above tool to suck out the oil.


The outside diameter is 3mm is this enough to get past the top of the damper rod and remove all the old oil


I would refill with 465cc the required capacity for MY03.


Then refit all internals and then refit top bolt and torque to 23N then torque top yoke to 30N


Question will the top bolt go on with the fork fitted in the yoke how much would you need to compress the spring.
Remember the fork is fully extended with front wheel off the ground.


Repeat on the other fork.


any comments...

[unfazed]

Theory is sound but it is unlikely you will get all the oil out as some will remain trapped around the damper rod. Measuring the air gap when refilling will be more difficult, but possible.

If your happy with than then by all means try it.

The 465ml is from bone dry and is to much for what you are doing, set the air gap instead to the standard 132mm

*Tighten the fork cap bolt first to 23Nm and then the top yolk bolt to 30Nm not the other way around*

*When undoing them always undo the top yolk bolt first and the fork cap bolt second*

 

[Punkstig]

It will be difficult to measure the correct air gap with forks in situ as they don't sit vertical.
By the time you've faffed about pumping the oil out you could have unbolted the legs and done it properly!