When I went to the 542 (RIP) from the 452 I had to go to 1 to 1 1/2 turns of negative from 1 turn pre load with my 452. now I'm back to 1 turn pre load with a 452 tried 2 turns of pre load last time out and it felt unstable top end and moved around a bit!!
Then an oil leak ended my week end!
Calvert told me if it feels unstable and moves around to loosen bars as too tight does not let the suspenion work I assume you have a big incher that makes it act too tight. on mine it did anyways.