The
run the engine for 10 minutes at each each rpm, 4k, 5k, 6k and 7k sounds like the procedure Super Tigre specified for their 2 cycle ringed engines and it works too.
The Hirtenberger HP21VT is a nice looking engine but when I buy another engine I think I'll go with a Saito in the 100 to 120ish size. Didn't want to upset Pete by typing a "5" on the end. 
You know how sensitive he his.
Last edited by FlyerInOKC; 09-29-2020 at 07:30 PM.