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

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Posted by: snb73---------------------

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.


Posted by: Rich Rohrich---------------------

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.


Posted by: mkelly04---------------------

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?


Posted by: _JOE_---------------------

You could always make a little dipstick.


Posted by: whenfoxforks-ruled---------------------

I was waiting for someone to come up with the math equation, outstanding. A wild guess, about what drips off your springs is 5 mm.


Posted by: kiwijohn---------------------

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!


Posted by: Rich Rohrich---------------------

Quote:
Originally Posted by kiwijohn

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.


Posted by: snb73---------------------

Thanks guys, you've all been a great help.

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



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