This weekend ran two XCR's. If I could get them good out of the hole I would hold them off for a long time. Rolling about 20, they would walk me pretty good. They have more on the top end. I ran two ZR 900's also. One piped and one stock. The piped one ran real well. he pulled me pretty good, the stock one i ran close with. He got a jump and held that distance. I turned my susp. on low so I could hook but he took off on me and I didn't get to run him again. Also beat one tcat, one machz. Very impressed with this F7.