studder/shaking

[NGN07S4R]

When I am riding my 07 S4R and the RPM's drop below about 3500 or 3k I get a harsh shake from the motor like its being bogged down is this normal? It usually happens if I slow down and then the RPM's drop and go to roll on it again. First Ducati so don't know everything about what is and isn't normal yet. It has a DP ECU for the S4RS mapping with 11% increased fuel flow. Any help would be great.

[Slide Panda]

That's pretty normal. Ducs are built to spin up higher and don't care much for the lower half of the 3000 range. Just keep the RMPs up a touch and all will be well

[stopintime]

I've never heard of a Ducati that won't try to shake it's owner off the seat if given full throttle under ~3-4,000 revs - it's not a great feature, but it's normal. Careful throttle/cruising should be ok down to at least 2,000 revs though. Just keep it ready at + 4,000 - IME better mileage and easier on you and the bike.

[NGN07S4R]

Perfect thanks that's what I was hoping to hear! She is a beast and I love her to death! Seemed a little strange but my custom vtwin does pretty much the same thing. Just wanted to make sure. Thanks guys!

[Slide Panda]

It's most notable from a dead start. As stopintime noted, once you're rolling in a higher gear you can cruise lower in the range than the start off revs. But cruising low down will lead the engine to be a bit hesitant to spin up if you need a quick burst of acceleration.

BTW - do you know how old the cam drive belts on your bike are? They are spec'd to be replaced at 12k miles OR 2 years of age from install.