The caliper brackets are different, but SP2 will fit on both, and SP1 will only fit on SP1 caliper brackets will only fit on forks.No you can not take sp1 bearings/races out and put in sp2 hardware...
No way, no how.
The sp2 fork tubes fit in sp1 triples fine.
The preload adjusters are different.
The internal top out springs are different.
The caliper brackets are fork specific.
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I have both SP1 and SP2 forks, and I have measured both.I was under the impression that SP2 caliper carriers will bolt to both SP1 and SP2 forks but SP1 carriers will only mount to SP1 forks? SP1 and SP2 calipers will physically interchange but they have different sized pistons so the correct master cylinder would have to be used
That's true, the fork bottoms are slightly different between two, but the mounting offset and bolt hole centers are the same.I was just commenting because the SP1 forks I have at home have two individual tabs for the caliper bracket and the SP2's sitting next to them have one full length tab for the caliper bracket, the SP1 caliper brackets I have, have extra aluminum that "fills in" between the two tabs on the SP1 forks. The SP2 caliper brackets (I have 2 sets) are completely recessed between the bolt holes to fit around the full length, one piece tab on the SP2 forks.
I've bolted the SP2 brackets onto the SP1 forks and they do fit.
Wow that was long winded
Yep, the 954 and early 1000rr have similar caps to the SP2. My DIY fork seal thread should be a good reference for doing it without effing up your forks.That's true, the fork bottoms are slightly different between two, but the mounting offset and bolt hole centers are the same.
The fork uppers are slightly different as well, with the SP2 uppers having more metal milled off, which is where they saved a few grams of weight.
The fork caps and preload adjusters are definitely different, and the removal and disassembly is different between the two, and the two must not be confused when disassembling the forks or the rebound adjuster can be permanently damaged. It's happened before.
And the SP2 portion is missing from the service manual, but the 954RR uses the same fork cap design, so it's procedures can be referred to for SP2 forks.
Now the $10,000.00 question, can SP1 upper tubes be put on SP2 forks?
I don't see any obvious issues with swapping them over. I believe the lengths on everything are the same, along with the diameters of course. The fork seals are the same, and I believe the fork bushings are the same. LDH should be able to say wether the fork caps have the same threads (I can't image those would be different).I have not tried that...yet.
I only compared various external dimensions between the two fork types, but I had no pressing need to disassemble both fork types for internal compatibility matching.