My bike was not and never has been running at it's best. Have 2 1200 GS, also it would overheat a lot quicker than the other bike in slow traffic on hot days. Couple of times last summer when I thought it was going to pack up it rattled an juddered so much.
Have another 12GS same model same year about 4000 more miles on it and it is, or was a different bike. It's much smoother and easier to control, a less snatchy throttle just a lot nicer to ride etc, also stays cooler for longer in the same situation (38+deg filtering through heavy traffic). Everything my bike now is! Well see how it copes with the heat in Turkey this summer
After a bit of messing about managed to get the graph on. Sorry if it is difficult to read, Will have another go at the fuelling graph which was predominantly in the section, A/F ratio 15.2 to 14.8
A quick Google found this
"In naturally aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 to 13.3:1 or λ of 0.850 to 0.901."
Just had a look at what BM say the GS should produce power wise, interesting. BMW say 77Kw (85.55bhp) and 111Nm (103.25 lbft) so really only just back to what it should be producing as standard
Still i'm very happy with how it performs now, as for the price! well less than half the price of an Acropovic end can that dose nothing other than look pretty and save a few pounds. Or 10 min on nippy normans or TT website spent on various bling. Which I am also just a little bit guilty of
Geoff down loads the "generic map" to get a base improvement then dose several runs and tweaks the various parameters to suit your particular bike. Dont think I would have just sent the ECU away, whats the point! A PC3 on a rolling road set up is going to be very much the same I suspect as Geoffs remap but without the extra connections and potential reliability issues with extra wires and sockets running around the bike.
Have another 12GS same model same year about 4000 more miles on it and it is, or was a different bike. It's much smoother and easier to control, a less snatchy throttle just a lot nicer to ride etc, also stays cooler for longer in the same situation (38+deg filtering through heavy traffic). Everything my bike now is! Well see how it copes with the heat in Turkey this summer
After a bit of messing about managed to get the graph on. Sorry if it is difficult to read, Will have another go at the fuelling graph which was predominantly in the section, A/F ratio 15.2 to 14.8
A quick Google found this
"In naturally aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 to 13.3:1 or λ of 0.850 to 0.901."
Just had a look at what BM say the GS should produce power wise, interesting. BMW say 77Kw (85.55bhp) and 111Nm (103.25 lbft) so really only just back to what it should be producing as standard
Still i'm very happy with how it performs now, as for the price! well less than half the price of an Acropovic end can that dose nothing other than look pretty and save a few pounds. Or 10 min on nippy normans or TT website spent on various bling. Which I am also just a little bit guilty of
Geoff down loads the "generic map" to get a base improvement then dose several runs and tweaks the various parameters to suit your particular bike. Dont think I would have just sent the ECU away, whats the point! A PC3 on a rolling road set up is going to be very much the same I suspect as Geoffs remap but without the extra connections and potential reliability issues with extra wires and sockets running around the bike.
