I bought a BMS 400cc sand sniper about two years ago. The engine siezed up and was rebuilt. I finally got it back together and it wont shift to neutral. I can find any information on this topic and would like some help due to me not knowing much about these things. I can get it to shift from 2 to 5 but it will not go below 2nd gear. It has a paddle shifter on the steering wheel that shifts the gears. Any help would be greatly appreciated

There is a solenoid at the transmission that that can be disconnected. Try shifting it manually to see if it is just an adjustment or if there is something going on with the synchros inside the transmission.

Is your idle down low enough that the clutch and rear wheels are not engaging when off the throttle? You may be getting gear bind if the idle is too high and engaging the gear teeth.

Hello
I am going through exact same issue, I bought a 2014 BMS Sand Sniper 400CC from a private owner who said he had the engine rebuilt by warranty but when he put it back he couldn't start it, I am thinking maybe he didn't put something back the way it was supposed to be. It does not shift properly, when I fiddle with it and get it to neutral and try to start it for a moment the starter turns the motor but then it appears like it goes into a gear and it can't turn the motor no more, when I try pushing the buggy around it will not move that is how I know it is back in the gear.
Any help on this would be greatly appreciated.

This buggy uses a copy of the Honda Rancher 350 engine. You might want to pick up a Honda service manual and see if you can find where it was reassembled incorrectly.

That is great info thank you so much
Does it matter what year Honda Rancher 350 it is?

They were built 1986-2004, but I don't know the differences between years.