The length I mentioned 70.5 to 74.5, I got from Guzziology, stated as measured from the front end of the drive shaft to the rear of the spring installed.
Is the measurement you quote the length of the spring after installation, that is compressed...
I realise how to place compression on the spring using the collar but I was referring to the correct procedure to attain that compression, that is by setting the collar and then fitting the axle to compress the spring or by fitting the axle and then trying to compress the spring by another means...
Thank you for your replies,
Greg