Rapid bike installed

As with a couple of other things, I took some time last week to fit the Rapid Bike module on the R1100S. It was a rather easy job, but once installed it caused the bike to be more difficult to start even with the choke trigger fully pulled. Add to this a disastrous gas mileage that makes me think the lean air/fuel ratio is now history and you can guess my reaction. More money thrown at trying to solve issues, more problems.

Apart from these new issues, the bike's absolutely flying with its new programmable injection module. It pulls  continuously with force in the whole rev range in a deeper than ever exhaust sound. The engine produces a much smoother torque curve and the famous 4500 rpm flat spot has almost disappeared. It was raining when I took it for its test ride, so there's certainly more to discover later, but a difference could be felt.

Now, the starting issue, a much higher idle speed and the rather short tank range made me think I was in for a "carb" synch, so I plugged my faithful Twinmax and gave the synch screws a spin. I ended up with both screws completely tightened, a sensibly lowered idle speed and an effective choke trigger. I also put the Power FRK module down just to see if it has something to do with it. 

Test ride is planned for tomorrow starting with a full tank of gas.

Dyno runs

I received the results from the last 2 dyno sessions with the R1100S. the other day I have to admit I'm a bit disappointed with the way the figures are displayed. With the performance upgrades put on the bike, I knew the engine would not show a 10hp improvement and was more in a search for a solid torque curve. Unfortunately, as you will immediately notice, the provided power and torque curves use the speed as the reference data. They should have used RPMs.

Here is what I got (all measures at the rear wheel, 13% loss from what the dyno guy said) :

- Session 1 : KN filter, Y pipe (cat eliminator), NGK iridium spark plugs, Nology Hot wires coils

- Session 2 : KN filter, Laser Daytona 2-1-2 system, Power FRK, NGK iridium spark plugs, Nology Hot wires coils, carbon air intake

Not even comparable ... Kind of useless, isn't it ? Even more if you consider the air/fuel ratio sensor did not work at the first session. But it did at the second session and allowed to show the engine's apparently running much too lean. This is something I have to investigate a bit further, because this is a case for an engine failure.