Registered Forum User
WSB Hero
Bikes: 1993 - 944SS & Aprilia Falco
Posts: 7,795
Join Date: Oct 2002
Location: north east
Hello,
I didnt really have any of those issues doing the coolant on my St4s. Have you tried squeezing some of the coolant hoses?
This 'can' disturb some trapped air and help it move along.
I think I used Motul premix myself in the past but Ive also been using WaterWetter without any apparent ill effect.
Hope you get sorted.