Engine Mounts incredible difference!

Implicit analysis is certainly the way to go here; explicit is only necessary for systems with nasty non-linearities (crash simulations, hyperelastic materials, etc.). Implicit dynamic would be a bit of an overkill and you'd need a much more complex model for it to be of any more use. It would really only be necessary if the natural frequency of the chassis is within the operating range of frequencies (I hope not!).

More complex loadcases would be good, but the right way to do this is to use simple loadcases on a more complex model. You really want to model more of the chassis (all engine mounts, engine, chassis, etc.; constrain at the wheels with loading applied at the rider contact points (foot pegs, bars) and body loading, to get an idea of overall stiffness change and feel to the rider. It would be somewhat complex and take a week or two to get up and running (assuming you don't have a CAD model of the bike already).

The above is what I'd do if we were to engineer some proper engine mounts. It would be an interesting project and would probably make some reasonable money given what people are paying for these things, but we're pretty busy as-is with our core products now. Regardless, a static analysis of a single mount is plenty good for a quick and dirty idea of what's going on when adding a big hole in the mount. I doubt most of the companies offering mounts are even analyzing at that level anyways!

Your suspension really only works in one direction. Flex occurs in all directions, so you want flex in some directions for comfort, particularly the directions that are commonly loaded without a way for suspension to give you that comfort.

For example, you want the triple clamps (and chassis, etc.) to flex front to back to take up some of the chop or the hit of slap down landings that don't put the force directly in-line with the fork compression (most all bumps are off-axis to the fork to some extent).  

But it gets tricky as too much flex impacts the handling of the bike. Too much flex actually changes the geometry of the bike enough to be noticeable. You need to balance more flex for comfort (which can also increase traction) with more rigidity for better handling. All of this can be a tricky trade-off to get right.

Has anyone spoken with you about our Lord & Saviour, Jesus Christ? 

I love these threads … buy what you want to buy, test test test, yes bring a torque wrench to the track and experiment. If you can’t notice a difference then problem solved, if you can well then cool! By most everyone’s opinion on here the factory teams and riders shouldn’t test and shouldn’t make changes to any parts or torque specs. Watch the keefer videos when he goes to the SX races and asks each mechanic he interviews if there is a known best axel to axel number and what those numbers are and none will say anything … but i guess something as small as wheel base won’t change anything and is snake oil just like triple clamp material, design, split clamp or solid, clamp bolt torques specs or material, greased or not greased, thread lock or no thread lock. If none of that mattered just grab a wrench and throw your bike back together with the ole it’s good an tight method… i’ll stick with my torque wrench and make sure its put together properly and yes you can feel the difference in mount design, torque specs, both stiffer and softer. 

Call me stupid.  I thought torque specs were for maximum hold (making one) without stretching, fatiguing or snapping the bolt or stripping the threads. Never mind under torquing and coming loose…Never In a million years would I have thought of it as a variable for tuning the flex of my motorcycle frame.  I’ll gracefully bow out and leave this to the nano flex feelers of frame mounts over the myriad of other physics going on between the tires, tire pressure, suspension, linkage, hot, cold, expansion, contraction, rider, young, old, fat, skinny, experienced, novice, wet, dry, sand, mud, etc, etc.  oh! and psyche!  Feel on brothers…I’m sticking with Goose and Josh. 

I'll put torque settings in the same category as floating axle blocks. Happy to be proven wrong but what is floating once your axle nut is tightened up?