94 bayou 400.i have carb apart.can i soak body in berrymans part cleaner or is there plastic/rubber parts inside body.

 

I'd try to avoid soaking because I can't say for sure about the rubber or plastic.Even soaking, getting into the little passages might be a problem.

I've seen some good videos on the net on how to use carb spray, direct that into one hole while plugging another and it should come out of various places depending which ones you are working on. Pretty slick.

 

Read this. I found it very helpful when going thru the carbs on my Concours street bike.

Cleaning the carbs 2 - Ninja250Wiki