S2R 1000 owners...$20 "flat spot" fix !!!!

[Old-Duckman]

Granted that I have only ridden it in 50-ish F temps. My Monster ran better when it was cold anyway so if I noticed major improvent in chilly weather I am hoping that I will have favorable results in the warmer weather too...though time will surely tell

Alas we will see no 90's for at least 9 months (barring some weather fluke)...and maybe not then. Believe me I am looking forward to testing it out in the 80's but also unlikely for many moons...high forecast for next week is one day of 65.

Changes in elevation: Yes the sensor is also a pressure as well as temp sensor (according to the Ducati workshop manual). I have nearly 16,000 miles on the Monster and probably have not had it over 300 miles in any one direction from my home. I do my touring on a '99' ST4. So for me, elevation changes are not a concern.

That said, I would think it would be no worse to deal with than a carburated vehicle. You can tune a carb for higher elevations by rejetting. If you were planning to ride some time in a much higher elevation...this is a very easily reversible mod. Remove 2 headlight bolts, remove tape, unplug the black box, plug the sensor back in, two bolts back in headlight...What, 20 minutes max...Much, much easier than rejetting a carb.

What I find most interesting is that some of the responses act like I am suggesting you cut off your family jewels and hope that the bike runs better because of your sacrafice...Hey, it's 20 bucks, 20 minutes...I see no reason to gripe, if you don't want to spend so little time and effort to at least see if it will improve how your bike runs...Frankly I couldn't care less...I was just passing on a cheap fix that seems to have worked wonders on my S2R 1000. Do with the info what you want.

[arai_speed]

What I find most interesting is that some of the responses act like I am suggesting you cut off your family jewels and hope that the bike runs better because of your sacrafice...Hey, it's 20 bucks, 20 minutes...I see no reason to gripe, if you don't want to spend so little time and effort to at least see if it will improve how your bike runs...Frankly I couldn't care less...I was just passing on a cheap fix that seems to have worked wonders on my S2R 1000. Do with the info what you want.

Great response man!   

[ICON]

Great response man!   

  What is up with all the haters? The man said it worked on his bike and now he wants to pass his experience on to you. You can use his experience  and apply it or just read this thread and move on. Simple as that. Give the guy a break.

Thanks  Old-Duckman for the heads-up. 

[Ivan]

Changes in elevation: Yes the sensor is also a pressure as well as temp sensor (according to the Ducati workshop manual). I have nearly 16,000 miles on the Monster and probably have not had it over 300 miles in any one direction from my home. I do my touring on a '99' ST4. So for me, elevation changes are not a concern.

As I said, if you don't live around hills the lack of altitude compensation may not matter to you.  For some of us, at least here in cali, we routinely travel from sea level to +5000 feet in a matter of minutes.  Not having the compensation for altitude would be undesirable.  I only pointed this out so that others considering this mod would be aware that it is not a panacea.

FYI, most carbs nowadays automatically compensate for altitude changes.  They have diaphragms that react to the change in pressure and in turn modify the mixture.

Hope it works out for you, given your limited range of travel you might be all set....

[bazz20]

As I said, if you don't live around hills the lack of altitude compensation may not matter to you.  For some of us, at least here in cali, we routinely travel from sea level to +5000 feet in a matter of minutes.  Not having the compensation for altitude would be undesirable.  I only pointed this out so that others considering this mod would be aware that it is not a panacea.

FYI, most carbs nowadays automatically compensate for altitude changes.  They have diaphragms that react to the change in pressure and in turn modify the mixture.

Hope it works out for you, given your limited range of travel you might be all set....

ill live beside the see and and travel on roads higher than 5000 feet and cant tell any differents but im still running the o2 censor

[He Man]

ill live beside the see and and travel on roads higher than 5000 feet and cant tell any differents but im still running the o2 censor

You have an EFI bike. theres a barometric sensor where your headlamp is. its that thing with a cone shape thing with slits in it.

[Duc Stamp]

As I said, if you don't live around hills the lack of altitude compensation may not matter to you.  For some of us, at least here in cali, we routinely travel from sea level to +5000 feet in a matter of minutes.  Not having the compensation for altitude would be undesirable.  I only pointed this out so that others considering this mod would be aware that it is not a panacea.

FYI, most carbs nowadays automatically compensate for altitude changes.  They have diaphragms that react to the change in pressure and in turn modify the mixture.

Hope it works out for you, given your limited range of travel you might be all set....

Old Duckman lives in an area where 300 miles encompasses sea level to 5000+ feet as well.  Not as quickly as in so cal, but it's still something he will be able to report on in the future.

[Greg]

  What is up with all the haters? The man said it worked on his bike and now he wants to pass his experience on to you. You can use his experience  and apply it or just read this thread and move on. Simple as that. Give the guy a break.

Thanks  Old-Duckman for the heads-up. 

Another +1 on taking the time to let other people know about something that worked for you. I might just try this thing so that we can have another opnion.



UPDATE: Just ordered one off Ebay, so I'll give you another opinion as soon as it shows up. We should still have enough riding time here in Texas to evaluate it  [moto]

[Old-Duckman]

I appreciate the people who understood where I was comming from. Hope it works out good for anyone who tries one.

I'll be curious to hear results.

[bazz20]

You have an EFI bike. theres a barometric sensor where your headlamp is. its that thing with a cone shape thing with slits in it.

i know where it was cause it aint there now , my old 900 ss couldent tell the difference either but runs the same up the mountain when i tune out board motors for the lakes , thats up in the mountains here well over 5000 feet the difference is a quarter off a turn on the mixer scew but again its only for idle

[brad black]

so the part is modifying the output of the temp sensor and telling the ecu the air is colder than it actually is?

i'm not sure how that'd effect the closed loop operation, but that should still produce the same running given the air temp is not a controlling input there.  it will run richer when open loop, but i'd expect the closed loop to override that.  i think duane told me that someone from marelli told him that the 5.9m tend to not use ambient air temp based spark advance trims.

if you could tell the ecu that the engine temp got to 60 degrees (celcius), but never hotter it'd run open loop all the time as that comes in at 65 degrees from my s2r1000 playing, but the engine temp trim should be almost zero by then - both fuel and spark.  if you hooked up a mathesis or dds you'd be able to work out what resistance is required in the engine temp sensor to replicate that temp, but then you'd need to set up some way of letting the resistance change for temps under 60 so you still got cold start enrichment.  might work.

the 1.5m ecu bikes have ambient air pressure sensors inside the ecu, whereas the 5.9m bikes have the 4 wire air temp and pressure sensor.

[MendoDave]

I envy you guys with the EFI.
These carbs are hard to adjust. At least on my bike they are. You gotta take half of everything apart just to get at them.

[Greg]

Finally got the chip or box or whatever you want to call this part. Will hopefully get it installed sometime this week and test it out next week end.

[RichD]

Well, you paid nearly $20 for a $3 resistor...

If you paid $3 for that resistor you got ripped off.   


...and on the topic of whether you should do any of this or not, my reply is:
"I think we're ALL GOING TO DIE."













Eventually.

[Duck-Stew]

I did the same thing to my M750CRi.e. back in '02 when I converted it to efi.  I went to Radio Shack and bought a 0-10K ohm variable resistor and wired it in series with the stock ambient air temp sensor.  Fired up the bike and turned the knob till it ran better according to my 'seat of the pants' dyno.  I know it worked because if you took it to zero ohms, the thing popped and chugged as it was ultra lean.  Turned it all the way up and it blew black smoke (way too rich).  The efi system I put it on was a non-feedback type (no lambda/oxygen sensor) '99 SS750i.e. system I pirated off of a salvage wreck I bought.

I *KNOW* it's not a proper fix, but since I had an hour and $5 into it...and it did make the bike run better for my time/energy involved...I let it run like that for a couple years.  Then I found a used DP SS ecu and no longer had a need for my 'home-brewed' solution.

Your Mileage May Vary.  Try at your own risk.  I warrant NO success if you do this to your bike.