Anyone do any serious motor mods to 2014/2015 yz 450?

I am curious what are u guys doing to get serous power ?

What kind if riding are you doing that you need more power for?

58 HP is pretty damn serious already.  I don't imagine anyone is really feeling the driving need to improve on that too much compared to the 50-52 they're used to.  The engine is so strong it could be a fairly competitive flat track engine in stock condition. 

I would like to get rid of some of the engine breaking, not sure cams or a slipper clutch. Or both , I run 100 obtain fuel so might put a hi compression piston in

I want to build a motor pretty much for sand drags , so I could use ALL I could get :)

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