We took this bike on because we know the owner. He’s complained about a flat spot since he got it so we finally agreed to have a look at it for him. We reckon Power Commander don’t do a module for it because you simply cannot eliminate the lambdas; the Delphi ECU runs the fuelling strictly via the two lambda sensors.
Our guess – looking at the massive exhaust muffler and the ECU – is that this model struggled to get through emissions and the result is the setup it runs. So we needed to come at it from a different angle. We got a PC V and adapted it to fit and employed some of our experience to make the Power Commander do things around the ECU and lambdas to smooth out the bottom end delivery.
The engine needed more fuel when the throttle was cracked on – like an accelerator pump – and it was the lean running that was causing the stumble. The truth is this is not a complete cure, but at the moment it’s the best we can do and the bike does run sweeter. We do like a challenge (now and again…!).