Makita SP6000 pulsing noise while cutting 

I Didn't. They all seem to have this to some degree. I ordered a replacement that was even worse - sent it back. Tested one in local store - was maybe only a little quieter than mine. Then took this one to local Makita dealer - they too said it doesn't sound like other Makita circular saws, but remembered having one SP6000 in for repair only to learn it's the constant speed system doing this. If it's particularly bad i'd return it - the one at shop was barely noticeable without cutting. Half a year still cuts nice and smooth. Sound hasn't changed either. Now i'd probably consider DeWalt or something much cheaper + good blade.

Yeah just tested mine straight out of the box and the exact sound got me worried. Only present when cutting and completely absent under no load. The more force I give to push the more apparent it sounds . Got it filmed and plan to mail it to makota service. What is your experience after a while ? Best Regards

It's the constant speed thingy my jig...its normal when under any load.