To smooth things out simply go to rain mode in town -,switch back to street or sport when you’re free of traffic. Works nicelyMy bike is stock everything. It is a great value-for-money fun bike. But the slow-running, bimbling-through-towns fuelling can be inconsistent and jerky, as we all know. Granted it is tolerable, especially if we keep the revs up.
I cannot justify a Coober/dyno solution for my riding needs. So Booster Plug and Rapid Bike Easy seemed to be possible ways forward for me.
I suspected that Rapid Bike Easy would give the better fix but have been disappointed by their lack of data or meaningful graphs, despite having exchanged emails with them and receiving some more info. I also suspect that the Bosch ECU could adapt a work-around to the Rapid Bike Easy modification in time but I am no expert in this field.
My original assumption concerning the Booster Plug was that it would simply make a 6% enrichment across the entire rev range. I incorrectly thought that, whilst this enrichment would help under 6k and varying throttles, it might reduce peak power due to over-enrichment at higher revs. I was wrong.
After reading more carefully through the Booster Plug website I now realise that this simple little device provides an elegant solution for those of us who only want to refine the engine response at low revs and during throttle changes. When cruising, the fuelling will revert to lambda control and original factory mapping.
Even though the BoosterPlug is basically a simple plug and play device, it's a long road to get it right. Read all the details and development story here.www.boosterplug.com
The website instils confidence with lots of FAQ's and testimonials.
So I fitted a Booster Plug yesterday. Outside air temperature was 8 deg C. The engine fired and ran smoothly, without wavering, racing or hunting - it just idled steadily and sounded safe and solid, with a slightly deeper exhaust note. The improvement in smoothness was apparent within the first quarter mile. Throttle response is now more progressive and stable. It is no longer essential to keep feathering the clutch and throttle whilst slow riding, since the engine feels stronger and happier. Other have reported this same phenomenon and it has been my experience too. Strong smooth torque is snatch-free from low revs. Hey, its not perfect but its way better than stock and totally acceptable for a twin that will rev to 10k. I have only done 60 miles of very mixed country lane riding so far but can happily confirm that the fuel consumption is unchanged. I suspect it might be even better than before but I'll monitor that and report back in due course.
I am pleasantly surprised and better informed, thanks in no small part to related posts on this forum. If you fancy an easy-to-fit inexpensive fix to smoothen the slow running, this is it
Wait until you hit a Spanish diesel slick in the first sprinkle of rain following 6 months of no rain. I have seen trucks slide off motorways. Personally I use Street mode in the rain here. I have used RAIN mode once or twice - usually on Mud Slides. The 790 is the first bike I have had with any rider aids (including ABS).LOL RAIN Mode !!! can i ask what is the point of buying a 790 to stick it in RAIN Mode or any other bike for that matter
I managed to follow the graphs, despite not understanding the language. The Booster Plug clearly improves both power and torque right up to 9k+. The rev range up to 6k (ish) shows very useful improvements in power and torque, just where we need it.There is a youtube video from a german tuner who tested it on the dyno and shows the results, it proves that it actually works in the lower regions (and that's where the "problem" is) in the higher regions the AF ratio becomes a bit to high.
if you are familiar with the term "AF ratio" you can watch the video, it will make sense to you
I used German as my daily language for 6 years.speaking German is not an issue for me
Mate. I never really noticed it before being honest. Altitude does affect fueling more than most think. I am at almost 800metres.Did the coober get rid of the low RPM jerkiness completely?