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[johnnymap]

The 2000 SERG that I just bought has a DFO on it.  The guy I bought it from said that it is very easy to work with.  He gave me the instruction sheet.  The bike seems to run pretty good.  It has somewhat of an eractic idle.  Slow when cold, high when warm.  Seems to me it should be the other way around.

Anyone have any experience with this type of fuel mangement.  I guess it was what was available at the time.  Is it a good or bad system? Was it the only thing available for the MM fi system?  Thinking maybe I shoud change to a SERT or PC.   Would there be an advantage to either?  I have SERTs on my other two SEs. The bike seems a little slow off idle.  The bike has a high flow and Wild Pig slip ons, which sound really nice.  Had heard of them, but never heard them. 

Taking it to my independent tomorrow for service and new tires.  Going to try the Dunlop E IIIs for the first time.

john

[hd-dude]

 All of the above are available for the MM systems. The DFO can only add fuel in 3 areas. The PCIII or RT can add them at 250 (or so)  RPM increments and several throttle positions They also can tune each cylinder independently. They both can also adjust timing. Either with a dyno tune will make the bike perform better. The key here is to talk to your local tuner and find out which one they are most proficient with and use it.

[rednectum]

old wrench (forum member) is in new mexico. as they say in dallas----------just a few miles down the road!!!! i bet he can hook you up with a tune.

[grc]

John,

Unlike the later Delphi system, the M-M still has mechanical idle adjustments.  They were also famous for intake air leaks.  Before condemning the DFO as the cause of your idle issues, have your indie check those areas.  A new tuning device and a dyno tune won't fix it if you have basic adjustment or mechanical issues.

Jerry

[johnnymap]

Thanks, Jim & Jerry.

I will let him know.

john

[RobertinArgyle]

Hey Johnnymap-  I've been looking for a good independent mech in the Dallas/Ft. Worth area.  Is yours any good???

[johnnymap]

Robert the guy is super.  He is certified master HD tech, who got feed up with the coporate BS and started his own shop.  He is currently working out of his house in Allen. If you saw his shop, you can understand the pride he takes in his work.  His name is Brian Todd.  There have been a couple of posts about him and his shop on this site.  He will talk to you if you have a question and he does not act like you are some kind of DA, for asking questions.

I took my SERG to him this aftertnoon and was telling him about the eratic idle.  Before I finished he was telling me exactly what Jim and Jerry had told me last night.  He said the cold/hot idle check is a normal part of his service. 

Brian also has a guy who is supposed to be a guru with the sert who has a dyno in Richardson.  I have not used the guy but I have a friend, who is a member of this site, who has and was very pleased with his work.

His phone number:  469-667-1204

john

[johnnymap]

You guys were right on the money.  The eratic idle was due to an intake leak.  Brian is replacing the seals.

It helps to have an idea about a problem, then discuss it with the guy who is going to look at it and that is what it was.

john

[RobertinArgyle]

John-  Thanks for the info!  I will start taking my bike there for anything I can't do.  A good mechanic for these bikes is hard to find.  Now I just need to find a good tuner that works with power commanders.

[bigcog1]

Hey Robert, you've probably read on this site the opinions regarding fuel management sytems that "piggyback" the ECM (PC III, DFO) and those that replace it (SERT). I have a great deal of confidence in the opinions giving by our brothers and sisters here, as they are backed by experience in the field. The big picture I've walked away with here, and one that I agree with 100%, is that you need to use the devices that your dyno tuner suggests. Of course it is a given that your Dyno man is indeed "The Man".

My personal experience with a DFO wasn't good, but there are plenty of guys that have used them with great success. I ran a DFO on an '05 FLTRI which had a SE Stage I airbox, true duals, and Wild Pigs. The bike ran pretty well and I was very satisfied. However, on the way back to Ohio from Sturgis that year, my DFO apparently failed and since it was a "piggyback", my ECM returned to stock settings which were quite lean. It fortunately didn't damage the motor, but keep in mind that when you're hammering the throttle on a return trip home, your ECM doesn't exactly send you an e-mail to let you know there's a problem.

Consequently, I sleep better at night as my '03 SERK has a race tuner installed and it gives me a little bit of piece of mind. Just my experience.

Ride Safe,
Joe

[RobertinArgyle]

Thanks for the input.  I already have the pc so I would like to find someone to work with that...  However, if the best tuner I can find in the DFW area really wants to tune with the SERT, I guess I would cough up the cash for that system.  From all my reading on this site it seems to me that the tuner and not the system used is by far the most important consideration.

[SuperMario]

What's a DFO?  Someone should publish a list of these acronyms!

[Fired00d]

DFO = (Revtech) Digital Fuel Optimizer. Another tool that allows manipulation/control of Air/Fuel ratio.

Also you can find a list of frequently used acronyms here.

 
Ride Safe,
Fired00d
 

[SuperMario]

Thanks, Fired00d.

[Fired00d]

Thanks, Fired00d.

You're welcome.

 
Ride Safe,
Fired00d