Good shot of Dyan mod, moves pads to miss the Dyna oil pan which drops down below the frame. Bought 5 1/2" long 1/2" dia. bolts (drilled out holes a bit) to move the pads. Looks like 5" long would have worked. Just measure your pads to see. I also think the stock dia size would be fine, and would save drilling. But others told me to upgrade to 1/2" dia. so I did but they are only slightly larger than the stock bolt dia. It is mainly the extra length you must have. Go with 1/2" if you feel the weight of the bike is going to cut off the stock dia. bolts (which I doubt) Had to cut off the end of bolt by jiffy stand brace ( I could have just turned the bolt around). Put plywood pads to raise it up a bit so lift pads would miss clutch cable underneath. Put scrape leather strips on plywood to keep from slipping. Holds good. DO NOT BUY THE ALUMINUM MODEL, I have heard that it sways and is flimsy. It is not even built the same design so I don't know if it could be Dyna modified. HARBOR FREIGHT BIKE LIFTS Steel one $89 usual, some sales for $79. Item # 2792 Manufacturer: Central Hydraulics <-GOOD, LIKE MINE Aluminum one $More but not as good Item # 94715 Manufacturer: Central Hydraulics <-BAD, DO NOT