These lifts are OK for DPs...but for gassers? I'd really be cautious. MY situation, (owning a 750 pound H-D dresser) using a math formula, I found that the bike, lift, and elevating all of it up about 3 feet....I was about 300 pounds from my max rear axle max weight. Fine. BUT....I found I would LOSE 700 pounds off the front-end. Nope. No way.
Getting a trailer for my gasser was the only sensible thing for me.
My experience, my OPINION, my 2 cents (well...maybe 3)