Iv got 2, 2016 GV 125 engines and both have a sticking valve problem, will run fine after cleared, between 6 days to 2 weeks before they stick again wondering if anyone has had this problem and any solutions? would rather not go down the engine rebuild route, but don’t see any other alternatives.
Hmmm i would also caution that in the valve assemblies in the heads, there is some valve seals or cotters (did they get rebuilt/refurbed?)
, and have you also looked to make sure the “Tappet Buckets” actually slide down & up when pressing on to them so there isn’t some kind of resistance or debris wedging in to the walls ?