We have been selling extension packages for the 2019 - 2020 Polaris Indy EVO's since they were released last season. The following pictures detail turning my sons 121" into 136". We have packages for 121" to 128", 136" or 144" in stock. For MN flatland riding, I chose a 1" Hacksaw for my 13 year old son. You can easily install a 2" lug in the chassis, there is plenty of room. The 550 fan makes decent power and the low center of gravity works well for youth not ready for a higher center of gravity sled. 
