Where is the actual COG (Center of Gravity) on a PRO RMK?

[LoudHandle]

Gentlemen, Where is the actual COG on the PRO?
As I'm reverse engineering the development of the PRO Chassis from the IQR chassis with a lot of my own improvements. I want to redo the steering to a similar location and angle as the PRO RMK to save some R&D time.

If any of my PRO's were anywhere near stock I could figure it out but I remember seeing some graphic representations over the years that showed it. I have not been able to find those yet.

Anyone have something like that saved or bookmarked?

Thanks!

 

[LPIdaho]

(From memory) the CG for the whole sled was basically where the CG of the gas tank would be. Like straight up from front suspension mounting point and a couple inches above the tunnel.

 

[LoudHandle]

Thank you, I am hoping for something a bit more defined. Granted it will change depending on rider / fuel load etc. but I'm hoping to be able to measure from COG to the post and replicate that on my Three IQR builds. As I'm using them as test mules to finalize my PRO' geometry before spending the funds on the Carbon Fiber and having it all precut to my dimensions before I have it sent North.

I'll keep digging.

 

[geo]

LH, as you pointed out the rider position has a huge influence. The lighter the sled the more rider position influences the COG of the "package".
One of the reasons the Pro is less effort to ride is the rider needs to move less back and forth and side to side to find the "balance".
I've always found the front arm (of the rear suspension) position in relation to the drive shaft, when using an uncoupled suspention, to be the most critical for how a chassis feels and reacts to body position. But, that is very HP sensitive too because 200 HP can create a lot more lifting force than 140 HP.

IMO if your building a "mule" chassis for yourself, leave room for the vert. steering-handlebar post to move a few inches (M chassis or Pro designs are both adaptable to being moved easily), leave room (plate?) for moving the front arm mount (and the rear mount to keep suspention geometry correct), focus on the least weight possible front and rear and fine tune max weight loss with what is left between your legs.

 

[LoudHandle]

Thank you Geo. That has always been my plan, mass centralization around the driveshaft essentially, as that should be very close to where the COG theoretically should be. In fact I have a complete drive system design that would occupy the waisted space inside the drivers for 20 plus years. Just not cost effective to produce yet. All liquid weight concentrated around that same space. I have 3 IQR mules and 3 PRO's for development and proof of concepts before starting on my sub 400# wet weight Ready To Ride M-AXYS build. Fun times are ahead.