beatle
Junior Member
After riding the FZ6 for almost 3 years, I've lived with the on-off throttle response. It's really not a big deal on the street, but on the track it's a different story. I just finished my 4th track day on the bike yesterday. This was on Summit Point Shenandoah, a relatively slow course. There are a few corners done at a very low speed - like 30 mph. I'll brake, turn in, and then go to roll the throttle on to stabilize the bike. Every time I roll on the throttle, the bike's balance gets upset, my confidence goes down, my speed drops, and my line goes all over the place. It didn't lead to any near accidents, but I was definitely slower than a lot of bikes in those slow sections, whereas the faster sweepers where I'm higher in the RPM range, the throttle response is much smoother and acceptable, and I gain on other riders.
When I was tuning my car, I had to set the TPS. Apparently there is a TPS value at which the ECU says to start fueling. Let's call it 10. At idle, a low TPS value would be 6 or 7. As you increase throttle, the TPS value increases, but the ECU will only send idle fuel (or no fuel if above a certain RPM) unless TPS is 10 or higher. The problem was the in between setting of 8 or 9. At that point the throttle is open and you are expecting power, but there is none. When you finally reach 10, the fuel comes on, but it has to match a larger amount of air all of a sudden and the car jerks forward. By manually adjusting the TPS to a greater value at idle, the throttle response smooths out. You could go to a high TPS value, but at that point the car never shuts off the injectors when coasting (no big deal on the track) and it never goes to idle fueling which hurts mileage.
Is the TPS adjustable on the bike? I seem to recall some threads on this, but search is pulling up a lot of old threads, mostly about people who have the same problems and say a Power Commander can help, but not eliminate the problem. I think a simple TPS adjustment would do it.
When I was tuning my car, I had to set the TPS. Apparently there is a TPS value at which the ECU says to start fueling. Let's call it 10. At idle, a low TPS value would be 6 or 7. As you increase throttle, the TPS value increases, but the ECU will only send idle fuel (or no fuel if above a certain RPM) unless TPS is 10 or higher. The problem was the in between setting of 8 or 9. At that point the throttle is open and you are expecting power, but there is none. When you finally reach 10, the fuel comes on, but it has to match a larger amount of air all of a sudden and the car jerks forward. By manually adjusting the TPS to a greater value at idle, the throttle response smooths out. You could go to a high TPS value, but at that point the car never shuts off the injectors when coasting (no big deal on the track) and it never goes to idle fueling which hurts mileage.
Is the TPS adjustable on the bike? I seem to recall some threads on this, but search is pulling up a lot of old threads, mostly about people who have the same problems and say a Power Commander can help, but not eliminate the problem. I think a simple TPS adjustment would do it.
