prelude2.2 wrote:I have 10wt in them. would it make that much of a diffidence? I am about 90kgs

If anything I think 10w should make them rebound "quicker" than 12.5w, which is your issue right? The SP forks are rebounding much more slowly than the SE's.

It's a tough one as I suppose you don't know how well or poorly your SE forks were working in the first place, and you are using them as a benchmark.

I think one of the guys who has experience of both sets of forks or a suspension specialist needs to jump in here...what should the rough rebound rate be on SP forks? can they be re-assembled in such a way that would create slow rebound?

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(just a thought is there any mileage in rebuilding your SE forks with fresh oil so you have a direct comparison?)