Unable to tighten sled track

[maim]

looks like someone used a used set of apex mtx tunnel brackets on the rear from the pics from as they have an extra brace to the rear mount where that rust line is.

you could always put in a set of rail extensions so the 151 track fits properly but you will need to legnthen the tunnel and bumper as it looks to be perfect for a 144 track legnth. i do know looking at the pics the rear bumper is not a yamaha one as they are all round bar. that one looks like it was from a polaris from what i see.

 

[mr. bwok]

You will need some rail extensions to make that track work. It looks like someone did some modifications to a 121" RX1...... the front looks like 42" wide not 38.6". The sled also has the short riser not the tall riser with mountain loop. Rear bumper is not stock. Rear skid mounts are not from that sled. Witness marks show it was mounted differently at some point. Not sure what skid is under it, or why the tunnel is from a mountain. You need to find someone who has a mountain to get you some rail measurements and then post back. If is a mountain skid it may not be installed correctly and suspension geometry is hold rails to far forward.