I've got one of the new 2018 300rr machines. The Beta brand is new to me, coming off a whole string of KTM's and CRF-X's.
So far the forks seem OK and are doing the job, but the rear is almost totally unrideable as it is stock! Can you say Harley hardtail. Thats what it feels like sitting down. The rear kicks and bucks on every rock, root, etc., and I put a soft tire on the back, (shinko 505 cheater), which has worked well on my KTM 500exc.
Have to dive into the shock to tweak the valving a bit and maybe go lighter on the oil viscosity.
The spring rates are what the book calls for for me with gear on ready to ride.
The sag numbers look pretty good in the rear, but the shock wont take up any of the small stuff, but feels fine on bigger hits on the trails.
The clickers are set to full soft on the high speed and almost soft on the low speed. Don't really want to waste more money on springs yet till I look at the shock internals.
Mark.