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What rating is 4.5 - 4.3? on my previous 350, i had 54/260 rear spring for my weight

Just got my 2017 450 and am looking for the same info. I'm 165# naked. I'll have to weigh my latest gear to get the total. I put the first 1.5 hour on the bike yesterday with the forks loaded at 145# and the rear spring at stock preload. Looking forward to reading about everyone's experience.