I'm guessing that as you fitted the tyre, you're more than likely correct. I never ran Contis on my airheads, they never looked like they had enough tread. Metzeler Block C on the front was popular for dirt, with a long wearing and good handling Avon Roadrunner on the rear. Good handling that is until they squared off on a trip across the Nully. Doing a quick trip from Perth, across to the Eastern states and back, a Japanese Dunlop was usually used. $19.90 supplied and fitted (c1979); these were well and truly stuffed at the end of it all.