Question about Suzuki GSX 1300 R Hayabusa Motorcycles

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My busa runs horrible till i unplug the boost sencer than she runs greate so i bought a new sencer and pluged it in and she still runs horrible till i unplug it again. Is there something that i need to adjust or replace other than the sencer? PLEASE HELP

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  • madenjapan Sep 24, 2009

    Would you happen to know why she runs great when i just unplug the sencer and vacume hose? Thats the only thing i touch and she either runs great or terrible

  • madenjapan Sep 24, 2009

    the solution was helpful. Turns out the throttle bodies needed to be syncronized, I sincerely appreciate your help

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  • Master
  • 1,723 Answers

I think the boost control system problem is not the sensor, it's one of the relays or air solenoids that activates.

Read this:

Boost control is achieved using a gear position reader which interfaces to a relay board.
The relay board actuates air solenoid valves whose exhaust is limited by adjustable needle valves known as mufflers. Boost for gears 1,2 is adjusted by a threaded arm on the wastegate actuator. Boost for all other gears is adjusted by actuating the air valves and adjusting the needle valve on the mufflers to achieve the desired boost level for that particular gear(s). Solenoid valves bleed off air going to the wastegate thereby increasing the boost seen at the airbox as more pressure is required to open the waste gate. Air valves are used for gears 3,4,5 and 6. The overall boost control system allows any amount of boost to be available in any gear.


If you need further help, I’m available over the phone at https://www.6ya.com/expert/craig_3fa289bf857b1a3c

Posted on Sep 24, 2009

  • Craig Butler
    Craig Butler Sep 24, 2009

    Because the boost control is not activating any solenoids when it's unplugged. Then when you plug it in, the boost control starts working incorrectly, it's not controlling the air solenoids correctly and that's when it runs bad for you.

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