Play in the topshaft

[positronic]

I've had my buggy for about for about a week now, and noticed today the transmission had become noisy, when I checked the pinion mesh I noticed the shaft the spur is on has enough play in it for the pinion mesh to never be right.

I checked on my brothers and his is not like this.

I swear it was quiet the day before, All I can think of is set the slipper last night (holding the rear wheels and giving it throttle till the front wheels lift about 30 degree)

any ideas?