How many cc's equal 5mm in oil height?

snb73

Member
Nov 30, 2003
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I have an 03RM250 with KYB's. They were just serviced and only have about 4 hours on them. I want to add 5mm to the oil height, but I want to add it though the air releif hole. How many cc's should I add?

Thanks, Steve.
 

Rich Rohrich

Moderator / BioHazard
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Jul 27, 1999
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The inside of the fork leg is a cylinder, so .....

(3.14156 * (radius of fork ID ^2 ) * oil height ) / 1000 = volume in cc

Do one calculation with oil height = 10mm and one with oil height = 5mm find the difference between the two and you'll have your answer.
 

mkelly04

Member
Jul 27, 2007
196
0
Its been a while, but dont you measure the fork oil height with all the fork internals minus the spring in?


If so then simply taking the volume of the fork will add too much oil.........

I'm no suspension expert, will the added oil make a difference?
 

kiwijohn

Member
Dec 22, 2004
113
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The inside of the fork leg is a cylinder, so ..... (3.14156 * (radius of fork ID ^2 ) * oil height ) / 1000 = volume in cc

Superb answer!!

I would have just poured in more oil until it went up by 5mm - but hey, different strokes and all that! :)

This website rules!
 

Rich Rohrich

Moderator / BioHazard
LIFETIME SPONSOR
Jul 27, 1999
22,838
16,902
Chicago
kiwijohn said:
I would have just poured in more oil until it went up by 5mm -

Trust me so would I. ;)

I would just know how much is too much before hand. :cool:
 

snb73

Member
Nov 30, 2003
770
0
Thanks guys, you've all been a great help. :bang:

I was trying to avoid removing the forks from the clamps. I'll post my results and share it with everyone. :cool:
 
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