I ride both bikes 2002 xr4 and a 2014 wr450 and granted the terrain here on the East Coast is different. Maps and a larger rear sprocket did it for me for crawling and tractoring slow for the terrain I ride i.e. hilly-muddy-roots-rocks & tight and slippery with the wr. More clutch on the wr for sure, which is the small price paid for significantly better handling and a lighter overall feel IMHO. I didn't really have to mess with the idle to get the xr feel I wanted. One thing I found significant from a control standpoint is the seat height/suspension. Smaller riders (like me) should take steps to improve their skills on a significantly higher platform or alternatively consider a lowering link which I wouldn't recommend personally.