Premier Stinger help

Hi all, I've got a brand new stinger clutch with black springs. I mounted it last night and ran the engine to test it out and it seems to be engaging around 2800 instead of the 3300 where it should be engaging. I dismounted it and checked to make sure everything was correct, and it was to my knowledge, and it's still engaging at 2800. Do I need to break it in somehow? Would it be worth trying to mount orange springs (the only others I have) to try and see what it does? I'm just not sure what to do and looking for input. Thanks!

Note: running the black slide on a Lo206 motor
 
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