My bike is backfiring a bit when I get off the throttle. I've not too long ago put a Remus exhaust and a Rhinewest chip in it. Since the exhaust is a little louder than stock, it is more noticeable. Someone told me that the throttle position sensor baseline might not be set correctly. I'm not talking about the procedure where one twists the throttle three times with the ignition on after resetting the Motronic. I'm talking about the sensor itself and what the voltage readings should be when no throttle is applied. Where do I check the voltage on this? I don't know if this has anything to do with an idle problem I've noticed either. The idle rpm is around 1500, but sometimes when I'm just sitting at a light, it will go up to 2000 and then drop back down to 1500 repeatedly. Any ideas? I'm getting ready to install the latest throttle modification, so I figured this would be a good time to address these other issues.