Despite up to eight rivals on non-factory HRC Honda motorcycles Doohan's margin of superiority over them was such that in many races Doohan would build a comfortable lead and then ride well within his limits to cruise to victory. Although pure riding skill clearly played a large part in his success, the ability of his chief race engineer, Jeremy Burgess, to perfect the suspension and geometry of a racing motorcycle may have given him an advantage over his rivals. Between 1994 and 1998 the bike was said not to have had many changes, with Honda engineers reportedly becoming frustrated at Doohan's reluctance to try innovations such as electronic shifting (it was only when Rossi came to Honda in 2000 that Honda engineers had their head with Rossi willing to try more innovations).