I am thinking of trading my 2015 CVO RG which has been upgraded with the HD 117 kit on a 2019 hopefully CVO RG. I test rode a stock 107 M8 last year and was very impressed. How bad is this sumping issue? Does anyone know the percentage of CVO M-8's with the problem?
Thanks
The MoCo might have some of those numbers, but since the sumping seems to depend on a set of circumstances and/or conditions, those numbers really aren't meaningful...right now, it appears the sumping can occur with any M8 engine if the situation/condition arises.
If it turns out the oil return port in the crankcase is located where it can't quickly enough return all the oil to the system, MoCo is not going to be able to fix it with a band-aid.