Another MM EFI vs Carb thread
Cruiser
Joined: Jun 2013
Posts: 115
Likes: 10
From: Richmond Virginia
4th Gear
Joined: May 2008
Posts: 8
Likes: 0
MM to carb swap
Long time reader, only a couple posts.
Not to hijack, There is much food for thought here, both pros and cons of the swap. I have been riding the same 97 ultra with MM e.f.i. for the past 126,000 miles and have had absolutely NO issues with it, (well there was that ECM relay once) other than tuneability (or the lack thereof). Every time I made a change, i.e. pipes, a-c, cam, mild porting, etc. the bike almost seemed to learn itself in a short amount of time. does that sound right or is it just me? Yes, it was never exactly the same, but seemed to be closer the more I rode it. But I digress. I have recently made the decision to do a carb/ignition system swap. I found an S&S E complete kit for 200 bones, and a crane hi-4 dual, for the price of a pillow seat that I would never use again. After all the incident free miles I have put on the MM f.i., I am absolutely positive that I will have no regrets taking "Nadine" back to the stone age so I can reap ALL the benefits of the changes I have made to her, at a reasonable price. (the complete swap for the price of a map and tune on the dyno) Like I said, didn't want to hijack, just my 2 cents worth. Will let you know how it turns out. Will have a COMPLETE MM system from a 97 ultra available when this project is completed. Everything works fine, like I said, just swapping for tuneability.
Not to hijack, There is much food for thought here, both pros and cons of the swap. I have been riding the same 97 ultra with MM e.f.i. for the past 126,000 miles and have had absolutely NO issues with it, (well there was that ECM relay once) other than tuneability (or the lack thereof). Every time I made a change, i.e. pipes, a-c, cam, mild porting, etc. the bike almost seemed to learn itself in a short amount of time. does that sound right or is it just me? Yes, it was never exactly the same, but seemed to be closer the more I rode it. But I digress. I have recently made the decision to do a carb/ignition system swap. I found an S&S E complete kit for 200 bones, and a crane hi-4 dual, for the price of a pillow seat that I would never use again. After all the incident free miles I have put on the MM f.i., I am absolutely positive that I will have no regrets taking "Nadine" back to the stone age so I can reap ALL the benefits of the changes I have made to her, at a reasonable price. (the complete swap for the price of a map and tune on the dyno) Like I said, didn't want to hijack, just my 2 cents worth. Will let you know how it turns out. Will have a COMPLETE MM system from a 97 ultra available when this project is completed. Everything works fine, like I said, just swapping for tuneability.
Last edited by 97bagger; Nov 24, 2013 at 01:59 PM.
Thread Starter
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Road Warrior
Joined: Apr 2007
Posts: 1,952
Likes: 15
From: Senoia, Ga., by way of Miami, Fl..
Ok guys, I've stumbled on a harness and believe that's the way I'm going to go.. It appears the correct carb isn't quite as unattainable as I originally thought.. So that brings up a couple more questions..
1- What exactly do I need for ignition? I'm expecting a pick up, module and trigger wheel. Will one of the aftermarket type's make a simpler/cheaper option?? recommendations?
2- Anyone know what the internal diameter is of the tank fittings? I can figure it out as I go to take it apart, but I'm devising a plan to cut the inside tube, before I actually disable the bike.. Pictures in the tank would be awesome!
3- Will I be able to use my stock cables??
Thanks for any input! I plan to do a thread on the actual job, to make it a little easier to track this stuff down in the future..
1- What exactly do I need for ignition? I'm expecting a pick up, module and trigger wheel. Will one of the aftermarket type's make a simpler/cheaper option?? recommendations?
2- Anyone know what the internal diameter is of the tank fittings? I can figure it out as I go to take it apart, but I'm devising a plan to cut the inside tube, before I actually disable the bike.. Pictures in the tank would be awesome!
3- Will I be able to use my stock cables??
Thanks for any input! I plan to do a thread on the actual job, to make it a little easier to track this stuff down in the future..
Road Captain
Joined: Sep 2012
Posts: 675
Likes: 32
From: Massachusetts
Ok guys, I've stumbled on a harness and believe that's the way I'm going to go.. It appears the correct carb isn't quite as unattainable as I originally thought.. So that brings up a couple more questions..
1- What exactly do I need for ignition? I'm expecting a pick up, module and trigger wheel. Will one of the aftermarket type's make a simpler/cheaper option?? recommendations?
2- Anyone know what the internal diameter is of the tank fittings? I can figure it out as I go to take it apart, but I'm devising a plan to cut the inside tube, before I actually disable the bike.. Pictures in the tank would be awesome!
3- Will I be able to use my stock cables??
Thanks for any input! I plan to do a thread on the actual job, to make it a little easier to track this stuff down in the future..
1- What exactly do I need for ignition? I'm expecting a pick up, module and trigger wheel. Will one of the aftermarket type's make a simpler/cheaper option?? recommendations?
2- Anyone know what the internal diameter is of the tank fittings? I can figure it out as I go to take it apart, but I'm devising a plan to cut the inside tube, before I actually disable the bike.. Pictures in the tank would be awesome!
3- Will I be able to use my stock cables??
Thanks for any input! I plan to do a thread on the actual job, to make it a little easier to track this stuff down in the future..
ignition: nearly any aftermarket will do. i had excellent luck with my Dyna2000p (which is sitting in a drawer right now, new engine came with an IST ignition). trigger wheel is OEM (or aftermarket, doesn't really matter as its a rather simple piece of gear. OEM is $150+, aftermarket was $40...easy choice for me)
dont remember ID of tank fittings, but I used a dremel cutoff wheel, and cut from the outside of the tank (inside the threaded bits) inwards. it was nearly impossible to get the angle i needed from inside the tank.
I used my stock MM EFI cables on my Mikuni when I did my swap (using the stock bars at the time). they were adjusted out pretty far, but they did work
If you find yourself needing swap parts, shoot me a PM with what you need. I probably have it sitting in a box here
Cruiser
Joined: Mar 2013
Posts: 178
Likes: 2
From: Ohio
The tank took some thinking. I used a Dremel cut-off wheel to cut the line as low as I could in the tank. After I had all the fuel out, I put a box fan to it for a week. You do not want any fumes present..............bomb!!! After the line was cut inside the tank I kept stepping up the drill bit size on the outside of the tank to the largest one that would fit in the hole. Be careful to not damage the threads as this is where your petcock will need to be installed. I wrapped the bit with 1 layer of electrical tape to try and protect the threads. You will not be able to get it cut down as far as you want.
I put a magnet in the tank when drilling to try and catch as many shaving as possible. Make sure you clean the tank out well when you are done.
I put a magnet in the tank when drilling to try and catch as many shaving as possible. Make sure you clean the tank out well when you are done.
Thread Starter
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Road Warrior
Joined: Apr 2007
Posts: 1,952
Likes: 15
From: Senoia, Ga., by way of Miami, Fl..
So, I found an inside tubing cutter that looks like it will work perfectly, but its only available in 1/2 and 3/4".. I figure the 1/2" may work, but thats why I'm trying to find out what size the fittings are. Either way, great info guy, much appreciated! Any othere tips would be welcomed as well.. I'm gathering right now, planning to have it done by springime at least.. Also doing the suspension and a few other things, so we'll see where my funds run out.. 
If I were to use the Dyna2000p, will I also need an ignition module, or is that the whole system?? I'm visualizing a stock set up with the pick up and module being separate..
If I were to use the Dyna2000p, will I also need an ignition module, or is that the whole system?? I'm visualizing a stock set up with the pick up and module being separate..
Cruiser
Joined: Mar 2013
Posts: 178
Likes: 2
From: Ohio
Inside the tank, the fitting is tapered. The fuel line is small,1/4-3/8". The first taper on the fitting is larger 1/2-5/8" the last taper at the tank is the largest 1/2-3/4". All guess', but that's what I remember.
Ultimate HDF Member
Joined: May 2006
Posts: 6,590
Likes: 444
From: Ohio
So, I found an inside tubing cutter that looks like it will work perfectly, but its only available in 1/2 and 3/4".. I figure the 1/2" may work, but thats why I'm trying to find out what size the fittings are. Either way, great info guy, much appreciated! Any othere tips would be welcomed as well.. I'm gathering right now, planning to have it done by springime at least.. Also doing the suspension and a few other things, so we'll see where my funds run out..
If I were to use the Dyna2000p, will I also need an ignition module, or is that the whole system?? I'm visualizing a stock set up with the pick up and module being separate..
If I were to use the Dyna2000p, will I also need an ignition module, or is that the whole system?? I'm visualizing a stock set up with the pick up and module being separate..
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Road Warrior
Joined: Apr 2007
Posts: 1,952
Likes: 15
From: Senoia, Ga., by way of Miami, Fl..
From what I'm seeing, the 2000p is just the module, not the pick up, is that correct?? The ultima kit comes with the pick up, which appears to have the module build in, but also comes with a new coil.
So, my next question, do I need a coil as well??
Sorry for the ignorant questions, but I'm just not familliar with the aftermarke and the descriptions dont seem to spell it out for me.. I appreciate the help and patience..
So, my next question, do I need a coil as well??
Sorry for the ignorant questions, but I'm just not familliar with the aftermarke and the descriptions dont seem to spell it out for me.. I appreciate the help and patience..
Road Captain
Joined: Oct 2009
Posts: 701
Likes: 1
From: The Great Southwest Desert
You need the cup in the nose cone. The EFI pickup plate will work fine. Any touring ign module. A new single fire coil. VOES switch. Intake manifold. Pingle tank adapter if you are gonna use the EFI tank. (I have a set cheap I don't need.) EFI cables won't work on stock carb. (Cruise cable does not change, however.) You will need an air cleaner and backing plate for your application. (I used a Ness Big Sucker and original cover.)