4corsa

Almost forgot, one great unexpected plus to the Mistral Crossovers - I've got no more pinging under heavy acceleration in high gears in the mid rpm range! Not sure why or if it also may have to do with the fuel remapping, but finally no more pinging.

Ok so I get to mark two threads as "solved" in one weekend - that'll never happen again! So after installing the PC III and loading the map for Mistral Exhaust / stock air box, AND running through two tankful with Yamalube Engine Med Rx, I have no more pinging! I know I should have been more scientific and tried them separately, but I have no patience. The bike immediately ran better with the PC III, but still pinged a bit at the end of the first tank with the Engine Med Rx. But by mid way through the second tankfull, I couldn't get it to ping no matter how I opened the throttle or at what rpm. So to recap, I'm running Mistral Exhaust with K &N filter on the stock box, Power Commander III with map loaded for the Mistrals (richer map), and now using Engine Med Rx regularly (will probably use every 2nd or third tankfull moving forward), and my Scura has never run smoother or stronger - such a pleasure to ride now!
Thank you for all the help!

Will happily be able to hit the "mark solved" button. As a last resort I changed out the gear oil and used the Red Line Heavy Soundproof gear oil. I carefully only filled up to just slightly below the mid level dot in the check window. Went for a 100 mile ride and no leaks! Even when left on its side stand. I noticed that the Red Line product has more "clinging" power than normal gear oil. It didn't seem much thicker, but it clinched to my funnel, even after 5 minutes in vertical position, it didn't drain off the surface. Must be Red Line's secret weapon.