It is very important that all the components are carefully cleaned.
If removed, fit new valve guide seal rings (10), lubricate with engine oil and insert from the spring side with tool part no. 88713.2442.
Fit the end of the tool into the valve guide and use a mallet to tap the seal rings (10) home into the valve guides.
![](https://motoinstruction.ru/img/ducati/18/124412.jpg)
![](https://motoinstruction.ru/img/ducati/18/124413.jpg)