not your average clunk

hello everyone , I wrote a 7 paragraph thread but got no answer , so I thought I would shorten it . thank you to anyone that can point me in the right direction .

my bike makes a clunk noise and you can feel it when it clunks . clunk is directly related to speed im going . faster speed: faster clunk . it clunks in all gears , and is more intense in four wheel drive . you can also hear and feel the clunk very lightly in neutral when reving the engine . the clunk would seem to be coming from the drivetrain but I cant pinpoint it exactly .

I planned on bringing it to the shop, as I have no tools and just changing the axle was a hassle in the driveway ( nuts holding caliper were stripped) . but I wanted to see if someone can suggest something easy I can check like the driveshaft phasing , or belt or wheel balance or anything. im at my witts end . thank you again