I had a couple of 125’s and the reg/rec was a weakpoint. Also the oil pump failed so ended up bodging back to pre-mix.
They’re bloody heavy, the suspension is soft and longish travel, the front disc is quite good, vibration isn’t too bad and they don’t sound like an RD or TZ as they’re tuned for torque rather than revs. The centre stand lug welds are a weak point so if they’re corroded they’ll need welding.
The only one I ever liked the look of was this one
I suspect he spent more than a grand on it though.
Plenty of good resources out there as there’s plenty of other mentalists fans out there EG