Just picked up a new to me 2007 Daytona and I've been doing a maintenance routine on it. Previous owner had moved and I wasn't able to inquire about previous mods or work so I don't have a good baseline. Here is the current condition:
- Valves checked and in tolerance
- Jardine RT1 slip-on
- EXUP disabled unplugged and verified open
- Using Wanyes Jardine map (also have tried 20400)
- Air filter cleaned
- New battery charged with solid voltage
- Throttle bodies balanced using TuneECU
- TPS adapted after every map change and voltage showing 0.59
- Brand new spark plugs
- No CEL
Problem --
Idle is perfect. No issues. Revs normally in neutral. Pulling away and at lower RPMs the bike works nicely. Initial acceleration from 3-4k to 5-8K is fine but after sustained higher RPM running opening the throttle up quickly causes what feels like fuel starvation (hesitation and coughing). At higher RPM 8-10k the bike really struggles with the same symptoms being amplified. Slower acceleration lessens this.
My suspicion is that the fuel pump is not meeting the fuel demand at prolonged and higher RPM. The fuel line itself doesn't LOOK to be kinked as far as I can tell. The injectors spray a nice mist after the line is primed. I've ordered a new fuel pump, but would like any further suggestions in the mean time if anyone can offer them.
Thanks! (I've spent a long time searching already and appreciate this resource. This is one of the better bike sites I've been on.)
KB
- Valves checked and in tolerance
- Jardine RT1 slip-on
- EXUP disabled unplugged and verified open
- Using Wanyes Jardine map (also have tried 20400)
- Air filter cleaned
- New battery charged with solid voltage
- Throttle bodies balanced using TuneECU
- TPS adapted after every map change and voltage showing 0.59
- Brand new spark plugs
- No CEL
Problem --
Idle is perfect. No issues. Revs normally in neutral. Pulling away and at lower RPMs the bike works nicely. Initial acceleration from 3-4k to 5-8K is fine but after sustained higher RPM running opening the throttle up quickly causes what feels like fuel starvation (hesitation and coughing). At higher RPM 8-10k the bike really struggles with the same symptoms being amplified. Slower acceleration lessens this.
My suspicion is that the fuel pump is not meeting the fuel demand at prolonged and higher RPM. The fuel line itself doesn't LOOK to be kinked as far as I can tell. The injectors spray a nice mist after the line is primed. I've ordered a new fuel pump, but would like any further suggestions in the mean time if anyone can offer them.
Thanks! (I've spent a long time searching already and appreciate this resource. This is one of the better bike sites I've been on.)
KB