One last strange problem that I’m still pondering: during high load situations such as 5th or 6th gear at full throttle and 9,000+ rpm the engine would suddenly feel as if it ran out of fuel. This bike has no fuel level indicator or low fuel lamp to verify this though. If I rolled off and back on the throttle gingerly the engine would pick back up and I could continue provided I wasn’t at 100% throttle. This problem only occurred after 6 or so laps of each session, but was very repeatable. I genuinely though I’d run out of fuel when it first occurred. When I inspected in the pits, the fuel pump was still submerged and there was probably 1/3 of a tank of fuel left. I topped off and went out next session and the same issue occurred late in the session. Even brimming the tank I would still get this problem before the end of the sessions. I’m not sold on this being fuel level related. It could possibly be heat related. The ECU on this machine is an ancient Magneti Marelli 59M which are notoriously unreliable. After some research it is apparently common that a failing ECU will cause igniter faults that strangely result in 0 volts going to the fuel pump. Being a 25 year old Italian machine with Italian electronics, there are no check engine lights or OBDII ports. There’s only ancient software that’s very difficult to find and purchase. To rule out the really easy stuff first however, I think I’m going to stuff the tank with some mesh to reduce the sloshing of fuel that could cause symptoms like what I was experiencing. This will take some more testing. Ideally I’ll get my hands on some old Italian software and report back. As always, testing continues.
And lastly, because all of this testing is done on a racetrack, the results should be lap times. Unfortunately I haven’t splurged on a fancy Aim Solo 2 GPS lap timer or data logger just yet, so a good friend with an iphone is my only reference. Lapping in the 1:58s means this Ducati is quick, and not just for an old turd, quick even by modern bike standards. I’m hoping next time to be able to ride the Triumph 675 and Ducati on the same day and compare lap times and splits to see how they stack up. Stay tuned.