Removing fork oil?

[Ian Geary]

Morning all

I'm replacing my steering head bearing and whilst the forks are out I thought I'd renew the oil (45k probably on original oil)

I don't want to disassemble the whole fork as a) I haven't got replacement washers or seals and b) I plan to ride to work tomorrow morning on it.

I have removed the top cap, pumped the fork a few times and left them upside down over night

But my question is: does anyone know if this is sufficient to drain them? Or is there likely to be loads of oil still in them?

It's a cbr900rr with conventional forks.

I was planning to refill based on measurement hence my question about removing all the old oil.


Each fork holds just over 500ml so I suppose I could measure the oil that came out?



Thanks

Ian

[trickywoo]

What you’ve done will get the vast majority of the oil out.

As well as volume I’d like to check the air gap but you should be ok measuring the volume if you are careful. I’m sure you know you’ll need to pump the fork when you refill also.

[Crudeoink]

Ian Geary said:

Morning all

I'm replacing my steering head bearing and whilst the forks are out I thought I'd renew the oil (45k probably on original oil)

I don't want to disassemble the whole fork as a) I haven't got replacement washers or seals and b) I plan to ride to work tomorrow morning on it.

I have removed the top cap, pumped the fork a few times and left them upside down over night

But my question is: does anyone know if this is sufficient to drain them? Or is there likely to be loads of oil still in them?

It's a cbr900rr with conventional forks.

I was planning to refill based on measurement hence my question about removing all the old oil.


Each fork holds just over 500ml so I suppose I could measure the oil that came out?



Thanks

Ian

You'll have got most of the oil out this way. Pump the piston/rod a few times upside down to get the most out. It's not too hard to replace the seals and things but appreciate you need the bike for tomorrow. The change in oil alone will make a good difference, I bet the 45k old oil will be minging

[Ian Geary]

Thanks both

Yes it was a pretty greasy dark brown.

The rear shock was knackered and has been replaced so thought I'd do both ends at the same time.