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[clegg]

     Ok, so my 2000 FLTRSE1 ate it's cookies. It is pretty much junk from the crank out, so I am going to stroke it into a 106. My question is with the fuel injection. Is there anything I can do to the existing EFI package to make it better? Can this system keep up ok with 106 inches? Are there any options out there other than the Zippers and the Power commander? Already had 2 PC's crap out on me, so I am in no hurry to go down that road again. I would like to go Zippers, but I am already going to be out more money than I can afford. Any help-ideas-insight will be appreciated.

[Ironhorse]

106 will be pushing it. The limitations for M&M is the dual throated throttle body. It just does not flow as much as the larger single throat. The other option is to go carb for about $700 in used parts. I had the Zippers Kit on my old 2001. While it was decent, it did have some issues. In retrospect I should have gone carb.

[Twolanerider]

As Mark mentioned that's going to be more engine than a Marelli setup will handle well.   BC Gerolamy can bore your throttle body.  But not a lot.  There are larger TBs out there.  But they are very very expensive.  If you want to stay with fuel injection the Thundermax/Delphi upgrade kit isn't the only option.  But of those I know of it is far and away the best.  

Fortunately (for me) I've not had the problems Mark did.  Have it on my 2000 and it's been a good tool.  I don't like the company but that has been a good kit.  Also put that kit on an 01 after doing mine and it's been good to.  Both of those were well after Mark's hassles so some bugs had been ironed out.  

For bigger build on a 2000-2001 SERG I wouldn't be wedded to fuel injection though. Especially if the bike isn't a cross country or altitude bike.   You could make it a very competent regional cruiser with a carb conversion for quite a bit less money than that Tmax conversion kit.

[strokerjlk]

another one to consider.

http://www.horsepowerinc.net/Products_Magnetti%20Marelli%20Throttle%20Bodies.htm

[Twolanerider]

another one to consider.

http://www.horsepowerinc.net/Products_Magnetti%20Marelli%20Throttle%20Bodies.htm

That one is just a throttle body though.  Still have ECM programming limitations.  There are other dual throat throttle body upgrades that don't leave you half way through a conversion if that's all one needed to get done.   

[Twolanerider]

Another option would be to start watching eBay do 02-03 main and engine harnesses and put those with a Delphi throttle body and just make it a Delphi bike.   Would need a crank sensor also but would no longer need the cam sensor.   

[strokerjlk]

Another option would be to start watching eBay do 02-03 main and engine harnesses and put those with a Delphi throttle body and just make it a Delphi bike.   Would need a crank sensor also but would no longer need the cam sensor.   

that is the best way.

That one is just a throttle body though.  Still have ECM programming limitations.  There are other dual throat throttle body upgrades that don't leave you half way through a conversion if that's all one needed to get done.   

there is always direct link.
or have your buddy John tune it, with PC. he is good at working those MM/ PC combos.

[jayray00SERG]

My 00 FLTRSE1 has a tragic hiccup in slow speed low throttle manuvers. Makes me keep the revs up, feather the clutch. Carb conversion available on this 95" motor? Runs strong above 2000 rpm. The hiccup is dangerous....

[Twolanerider]

that is the best way.
 
there is always direct link.
or have your buddy John tune it, with PC. he is good at working those MM/ PC combos.

That'd be true if John were still in the trade.  He sold the dyno and got off the road though.  He could do more with a Marelli bike and a Power Commander than anyone I knew.  Those old bikes lost a resource when he hung it up.

[Twolanerider]

My 00 FLTRSE1 has a tragic hiccup in slow speed low throttle manuvers. Makes me keep the revs up, feather the clutch. Carb conversion available on this 95" motor? Runs strong above 2000 rpm. The hiccup is dangerous....

Yes it would Jay.  Any of the options discussed here so far would be considerations. 

Before making the significant change it'd be worthwhile covering all the basics though.  Intake seals and exhaust gaskets.  Due to age if nothing else a set of plug wires dropping out under a load.  Early signs of a dirty fuel filter can feel something like what you've described.  And if anyone has ever tuned it can't discount the idea that they just didn't do a great job.  Would hate to lose the ease of starting in cold weather and other benefits that come with a fuel injected bike (even an M&M bike) for something that's probably not a huge problem.

[clegg]

Thanks for all the input guys. I am interested in the big bore throttle body. Any one actually use one? I have always thought my MM bike ran ok, I just wonder about having enought flow. That would fix it... Like I said, I had 2 PC's leave me on road, so I won't be going back down that road. (I have a new one in garage that was free under warrenty if anyone wants to buy it..)

[Twolanerider]

Thanks for all the input guys. I am interested in the big bore throttle body. Any one actually use one? I have always thought my MM bike ran ok, I just wonder about having enought flow. That would fix it... Like I said, I had 2 PC's leave me on road, so I won't be going back down that road. (I have a new one in garage that was free under warrenty if anyone wants to buy it..)

I've used the 42mm upgraded (from stock 38mm) throttle body that Barry Gerolamy offers.  Have used that on a couple of pretty good 95" builds over the years.  But for the 106" you suggest I'd probably be looking for something around 50mm.  Going that far would also likely require changing the fuel regulator in the tank.

Marren is the cheapest I used to see to for a good regulator.  They used to offer a 58psi regulator for about a hundred bucks.  While that far in the tank would be hard not to go ahead and change the filter while there.

[Herko]

I've used the 42mm upgraded (from stock 38mm) throttle body that Barry Gerolamy offers.  Have used that on a couple of pretty good 95" builds over the years.  But for the 106" you suggest I'd probably be looking for something around 50mm.  Going that far would also likely require changing the fuel regulator in the tank.

Marren is the cheapest I used to see to for a good regulator.  They used to offer a 58psi regulator for about a hundred bucks.  While that far in the tank would be hard not to go ahead and change the filter while there.

Last I checked, on an MM bike the regulator is externally mounted on the throttle body.
4.0 bar regulators are available for the MM systems.
The 35% increase in fuel pressure would of course require tuning.
Last I checked, TTS still has available some MM tuners (old SERT).
Direct Link offers tuning keys for MM bikes as well.

[Twolanerider]

Last I checked, on an MM bike the regulator is externally mounted on the throttle body.

Last you checked?  You mean there was ever an option ?

My bad.  Was thinking of "fuel things" and had a brain fart.  It happens.  

Displacement and consequent output would suggest the change regardless of location.  And for anyone not totally bored by Marelli chatter here's the bottom of a Marelli throttle body that got disassembled just this part Saturday.  It's actually a part from Herko that I took apart for spares.  That round thing coming up from the rear left outboard side is the fuel regulator.

[clegg]

     I found another option. How about the S&S VFI module and 52 mm S&S throttle body? Anyone use that setup or hear any pros-cons? Be nice to chitcan the MM module and TB all-together.