Join Date: Nov 2009
Location: Lander, Wyoming
Your engine may not even have an abnormal appetite for engine oil, but you need to learn its habits..
When Kawasaki made changes for the Gen 2 bikes, for some stupid reason, some engineer Narrowed the oil ring assembly on the piston. This reduced the size of the oil return holes behind the oil ring, restricting the drain back paths.
Then to make matters even worse, an apparently high number of piston ring sets were mis-manufactured with a non-concentric #2 ring and many of the oil rings rails had poor quality chrome plating. (primarily 2008-2010)
The piston & ring sets are built by an outside supplier, but who felt the need to re-engineer an already 21 year old design is anyones guess. (Kawasaki or Supplier?)
The way the engines are built, the volume of oil coming off of the bottom rod pin and therefore onto the underside of the piston and onto the cylinder wall can vary immensely.
And in the rush to produce a larger volume of the newly revised model the Thailand factory got too sloppy with the final honing of many cylinders. Many of which should have never past quality control.
There are probably about a half dozen other pieces to the issue, but I feel these were/are the primary reasons.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting