RPM issue, will not go above 4k on tach

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zero9243
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RPM issue, will not go above 4k on tach

Post by zero9243 »

On a stock fzr 600, the tachometer will not go above 4k. The bike will rev higher, but the tach will not display the correct RPM's. not sure if this is affecting other performance on the bike since it is showing less than 13.7v at the battery when running. I've tried 2 VR's with the same results.
Upgrades:
  • Barnett Clutch------------------------------------------R6 Blue Dots, Front Master Brake Cylinder+Reservoir
    WP Adjustable Rear Shock----------------------------Vortex 520 Conversion with RK GB520GXW Chain
    V&H Header (4-1)--------------------------------------Swingarm Spool Mounts
    Cobra F1r Exhaust Can--------------------------------R6 Voltage Regulator
    Flo-Commander with Remote-------------------------Custom Airtech Passenger Seat
    Stage 7 Jet kit with Diffuser Caps--------------------Factory Pro Nickel Emulsion Tubes
    Wiseco 630 Kit------------------------------------------Custom Frame Slider Mounts
    Modking Hydraulic Clutch Kit--------------------------Hella Projection Headlight with Xentec HID Kit (H9 Bulb)
    Modking Aluminum Radiator Overflow Bottle--------




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DonTZ125
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Re: RPM issue, will not go above 4k on tach

Post by DonTZ125 »

Unplug the tach, then measure the voltage across the battery. If the voltage goes to something reasonable (14.3-15.3 @ 5000 rpm), then the tach is well and truly pooched.
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zero9243
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Re: RPM issue, will not go above 4k on tach

Post by zero9243 »

DonTZ125 wrote:Unplug the tach, then measure the voltage across the battery. If the voltage goes to something reasonable (14.3-15.3 @ 5000 rpm), then the tach is well and truly pooched.
Good thinking, i'll give it a whirl.
Upgrades:
  • Barnett Clutch------------------------------------------R6 Blue Dots, Front Master Brake Cylinder+Reservoir
    WP Adjustable Rear Shock----------------------------Vortex 520 Conversion with RK GB520GXW Chain
    V&H Header (4-1)--------------------------------------Swingarm Spool Mounts
    Cobra F1r Exhaust Can--------------------------------R6 Voltage Regulator
    Flo-Commander with Remote-------------------------Custom Airtech Passenger Seat
    Stage 7 Jet kit with Diffuser Caps--------------------Factory Pro Nickel Emulsion Tubes
    Wiseco 630 Kit------------------------------------------Custom Frame Slider Mounts
    Modking Hydraulic Clutch Kit--------------------------Hella Projection Headlight with Xentec HID Kit (H9 Bulb)
    Modking Aluminum Radiator Overflow Bottle--------




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