I Used 1.5 x 2 x1/8 tube from the front axle.
Newer Drive System on the L100 along with removable front axle on top.
This was some of the old fleet of STX Racer's.
....and this one is for sale!.....best of everything - GP Class loaded with a Kawasaki FC540V...plug in and play.
You do nothing but hop on, race and win. Selling for pennies to the dollar from net cost to make. No Shop Time!...and you probably won't build yours for what I am selling this for either. This is fully modular, dissembles is seconds with a 1/2" socket.
Has all my latest updates. This replaced the wife's STX IMOW, now she has a new Mini Pro-FX-Lite that replaces this....just need room. She finished 2nd last year in GP locally(behind me of course).