if you fit a 2004 or later ecu to an early bike the air pressure sensor will fault as it is located in the dash and communicates with the ecu via the can bus. i have suspicion that the air temp sensor input is wrong too.
i put my u59 st4s mapping into the 5am 2004 file and it runs very well in the early bikes, but uses more fuel - from 19km/l to 16 km/l or so. i have that mapping also in an s4r 5am file, which should work correctly in the early st4s as all the sensor inputs are the same. but i haven't got to try it yet. the mapping is for cam timing reset too, which the bikes i have run it in so far haven't had done. this may account for some midrange richness, as the cam timing done will trap a little more air, but the early solid pulley bikes aren't that far off as a general rule. last one i did i moved them 4 degrees max.
this mapping is noticeably stronger in the midrange than the dp mapping.
in the s4r i am running this mapping in the fuel economy is better than the dp s4r mapping. but from memory s4r were always worse.
comparatively the 5.9m mapping for st4s is just wacky. the comparison b/w it and the 5am mapping (std or dp) varies from 0.6 to 1.6 or so. just bizarre.
Two things. @stelbo - you can post your bin here. All you need to do is add .pdf to the file extension or change from bin to pdf.
That is one of the file formats that are allowed to be uploaded here. @tosaw - check that your ECU is a 5AM if you are going to try stelbo's bin file (it is on the label on the ECU) If it is a 59M and you load a 5AM bin you may well end up bricking it.
I have a 2000 ST2 that's been sitting for a long time. It needs all the fuel pump assembly stuff replaced, which is going to be expensive. Is the assembly the same for the ST2 as it is for the ST4? I can't tell since lots of parts are listed as ST2 or ST4. Any help is appreciated. Thanks...
I wish you are all fine.
I need your advice-opinion on the following issue.
Bike ST4s MY 05 with 5AM ECU.
I have two ECUs. The OEM W103 with the standard map and a W610 with a DP map.
Every now and then I would replace the whole unit and run the bike.
On the bike now the W610 with the...
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So I know this topic has been discussed extensively, but I really need some help with this..
I'm fed up with the stock lights on my 2001 ST4 and avoid riding at night because they are downright dangerous. I've read many posts about possible upgrades, but I'm having difficulty finding a...