Here's our most unique bracket vehicles. I built/tested it around 2004. NHRA started a class for it & my son wanted me to build it.
It's based off a Yamaha Banshee 350cc, twin cylinder 2 stroke. We used it for heads-up/grudge racing also. It was very successful in all venues we raced in from 300' dirt/sand drags, hill shooting, 1/8th mile but was purpose built for 1/4 mile.
The quad has recently been reconfigured for heads up 1/8th mile racing. Hoping to get some testing done this winter on it.
The 1st pic was our small motor in the far lane around 2010 with one of my boys on it.
The 2nd pic is the quad getting some upgrades.
1700/781L