i got a r and a 421 cheetah and i would recomend r in heart beat handle ten times beter just over all fell and if its not fast enough cause wen u jump from shee to r it will fill slow but so is stock shee put sphynx big bore port for u and make cubs sweat and they never break normal thigs wear but its super good woods/mx quad love mine and love my shee but i like showin up new 450s on old 87 cant beat it