1.) It makes more room to access the star wheel/detent for the shift drum.
2.) It will have to come off anyway if the cases are going to be split.
I really wouldn't mind if Honda had kept using the upper and lower case halves like their old bikes had. It may still be a pain to open the bottom end, but at least the top end didn't have to come off most of the time. Earlier this year I had to replace a kickstart shaft(common) in a low-mileage XL175. Although the Clymer manual said the whole thing had to come apart, I was able to pull the bottom case without disturbing the head or cylinder.
1995 XR628R -Lots of goodies...room for more.
"Another breakdown, suicidal shakedown,
Feels like I'm livin' on a chain gang."
HeadTrauma screwed with this post 08-20-2009 at 08:40 AM