I may be having some sort of fuel starvation problem on my 2006 620.  I can't go over 4,000 RPMs and if I'm accelerating quickly the bike starts jerking at around 3,000 RPM.  If I accelerate very slowly I can get to 4K and then shift gears.  The first half hour of my ride started off fine, but then the problem started so I limped home.  When I took my helmet off I could hear something whining under the tank.  It sounds like something is straining really hard to pump fuel.  The engine temps were not abnormally high or anything like that.  I think the highest I saw was 205 F.

Any ideas what the problem could be?

Just a shot in the dark:

Are you getting combustion from both cylinders?

Check for header temp to be sure.

I have a 02 750 on average what should the temp be?  I have alittle bluing on the headers about 3 or 4 inches down.  just got the bike used.  it does backfire a bit on decelaration after being high in the revs.

Quote from: DarkStaR on June 11, 2008, 07:27:42 PM
Just a shot in the dark:

Are you getting combustion from both cylinders?

Check for header temp to be sure.

Both headers were hot so I think both cyclinders were getting combustion.

I'd change the fuel filter and add a little dry gas to the tank.

Quote from: Travman on June 11, 2008, 07:25:40 PM
I may be having some sort of fuel starvation problem on my 2006 620.  When I took my helmet off I could hear something whining under the tank.  It sounds like something is straining really hard to pump fuel.

Any ideas what the problem could be?

To me this sounds like the tank isn't getting the air back in after it's taken the fuel out.
First things I'd do:
1) check that the breather tubes are not clogged by blowing air into them.
2) try riding the bike with the gas cap cracked open so it can breathe (yeah I know some will say this is dangerous) and then rev it past 6,000 RPM. You say this happens after 30 minutes, so you may have to actually ride for a little while. <-- I expect after 30 minutes of riding, when you crack open the gas cap you're going to hear air rushing in.

If that doesn't work then I'd change the fuel filter.

HTH and please post your final solution for everyone else.

I finally have gotten resolution on this problem.  It was a fuel pump.  The tech at DucPond here in Winchester, VA was able to diagnose it quickly.  According to them it is a $1,000 dollar part  .  Luckily the bike is just under warranty since it was bought in Oct. of 2006. 

The new dealership just south of Jacksonville, FL was not really up to speed.  They held onto my bike for several weeks while they were trying to get up to speed.  They are a Suzuki dealership, but they took over the Ducati/Triumph dealership the same week my bike started having problems back in June.  I was their first Ducati service customer.  I'm glad we are now in Winchester, VA.  I can walk to the dealership in under 20 minutes. 

Quote from: ducpainter on June 12, 2008, 05:09:56 AM
I'd change the fuel filter and add a little dry gas to the tank.

That was a very good suggestion.  I bought a used VW bug back in 1991 which had the similar problems to what my M620 just experienced and the solution was to change the fuel filter and add some dry gas.  The VW had sat too long and rusted a little in the tank.  Fuel filters were $1.50 and could be changed in 2 minutes.  I pushed that VW several miles to get it home when the fuel problem started.   When I let it sit for about an hour the particles in the fuel filter would settle and then the car would run for a short distance.  After about a year and 5 filters there was no more rust clogging the filters. 

Quote from: Travman on September 26, 2008, 04:22:32 PM
I finally have gotten resolution on this problem.  It was a fuel pump.  The tech at DucPond here in Winchester, VA was able to diagnose it quickly.  According to them it is a $1,000 dollar part  .  Luckily the bike is just under warranty since it was bought in Oct. of 2006. 

FYI, we have fuel pumps that are direct OEM replacements for $149. We've got dealer pricing so that shops can give out of warranty customers more realistic options.

GLAD to hear they took care of you. I've heard more than a few good things about DucPond.

Chris

Chris, thanks for that post.  High costs of replacement parts scare me.  It would be hard to justify $1,000 plus labor a few years from now when the bike may only be worth double that.  It is good to know there are other options for replacement parts.  This should go in the "Alternatives to Expensive Ducati Parts" thread.