Race Tech Fork Springs

[agricola]

I've bought some Race Tech fork springs for my 2009 FZ6 S2 and am aware that the set comes with a length of spacer that needs cutting to size. I'm told that the Race Tech springs are shorter than the standard springs although as I've not disassembled the forks I can't confirm this. 

Is anyone aware of the process of ensuring the correct spacer size is obtained? 

In addition the fork oil is to be replaced. Do I use the specified 467ml of oil?

All advice and guidance is gratefully received.

For anyone interested  the spring kit is code FRSP-S3732095 and the springs are 36.7x34.5x315 and 0.95kg

Try contacting RaceTech ?