I currently have 02 forks on my bike. I have brought a second hand pair of adjustable 07 forks. I would like to swap out the internals to make my 02 forks adjustable. My 02 fork tubes and lowers are in better nick than the 07s. I like the feel of the OEM 02 springs. I'm not an aggressive rider, I weight 85kgs, roads are bad where I live. My question, is there a difference in weight between the 02 springs and post 04. Also can the 02 springs be used with the 04 internals. I've read a few threads on this and the springs are a different length but I couldn't find any clear answers. Thanks.
I'm pretty sure such a swap can easily be done, but haven't done one nor recollect any previous thread of another having done it.
I suggest that the part numbers be checked for commonality for the tubes and one of the lowers.
If they are common, as I think they are, then it's a given that the 07 guts will simply retrofit into the 02 outers.
For sure, the 02 spring can be used with the 07 guts.
My recollection is that the front spring change from 03 to 04 was in the tinkering zone of change, and nothing dramatic.
By the way, the springs are dual rate, and not progressive.
There is a transition zone between the two rates that can fool the eye.
I can't remember if the 02 and 07 spring length vary much, but if they do, I doubt it's by much.
If you want your 02 spring to be behave exactly like it does now, simply shorten the spacer by the difference between the 02 and 07 fork caps at the spring resting surface of the cap relative to the face that flanges up on the end of the fork tube.
For you, re the "sameness" I sense you want, I'd do that spacer length change determination on the basis of having the fork cap ride height adjuster set
at mid point instead of all the rings showing.
There was a thread some years back about OEM front springs.
I remember posting some info to it after Rickard let me open up a set of spare forks he had.