identical except for the i version on the BF and stuff 650 brute said

 

Rule of thumb, don't use power washers on any of them. The high pressure water can get into other things as well other than peeling the paint off on the painted models.
I've been using "ATV Wash", then rinse it off w/the garden hose, my painted Brutes look great.
Other than the body style, the P650/BF650 are the same in the SRA Model.

 

The differences in the 650I and 650 SRA is independent suspension(650I) and Single rear axle (650 SRA). Also the engines had differences, look at the spec sheets at kawasaki. com. The 650 I had nickelsel plating in the cylenders, bigger carbs, and higher horsepower & compression piston than the 650 SRA. The 650 I also has different clutch/spring setup.

Do not know if all will have same engine in 2009. Hope this helps :thumb