Check out this video which explains how to use the oil pump priming sequence on your TPI to check the output of your oil pump and make sure it’s in good condition... The most common issue we see with the KTM and Husky TPI models is damage up the rear wall of the cylinder due to a lack of oil at some stage of running. This type of damage was rarely an issue with the previous carby models. There are several possible causes of this and regular maintenance can drastically minimise the risk of damage