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Wayne S.
Wayne S., Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 1255
Experience:  Experienced and Licensed Motorcycle Mechanic - all sizes and brands welcome.
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06 gsxr 750 randomly cuts out and dies while cruising at 3rd

Customer Question

06 gsxr 750 randomly cuts out and dies while cruising at 3rd gear approx 40 mph 4000 rpm. Any idea why? Idles fine, accelerates fine. Only have this issue when holding a steady speed
Submitted: 1 year ago.
Category: Motorcycle
Customer: replied 1 year ago.
Fuel filter has been cleaned. Trying to run some injector cleaner through it on this tank of gas. Battery has a good charge and charging system appears to be working properly. Aftermarket exhaust, pc3, and tre - all in place for 2 years with no prior issues
Expert:  Wayne S. replied 1 year ago.
Sounds like the throttle position sensor might havea flat spot in the range you are cruising at.The TPS is like a potentiometer and has differentresistances or ohms that progress smoothlyas you open the throttle. It might work well untilyou hold it at a certain bad spot and then startto cause problems.It is located on the throttle body and should readvery smooth if you disconnect it and connecta ohms meter and slowly open and closethe throttle. The ohms readings should notjump but slowly go up and down the range.It might have a flat spot at 40 in third gear.Also be sure battery cables are tight. ----
Expert:  Wayne S. replied 1 year ago.
Sounds like the throttle position sensor might have
a flat spot in the range you are cruising at.
The TPS is like a potentiometer and has different
resistances or ohms that progress smoothly
as you open the throttle. It might work well until
you hold it at a certain bad spot and then start
to cause problems.
It is located on the throttle body and should read
very smooth if you disconnect it and connect
a ohms meter and slowly open and close
the throttle. The ohms readings should not
jump but slowly go up and down the range.
It might have a flat spot at 40 in third gear.
Also be sure battery cables are tight.
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Customer: replied 1 year ago.
Disconnected the tre just to check, no difference. Battery cables are good
Expert:  Wayne S. replied 1 year ago.
The TPS is not TRE, it has to be connected for the bike to
run at all. It is on the throttle body unit.
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Customer: replied 1 year ago.
What would cause the tps to fail? Is it a pain to replace?
Customer: replied 1 year ago.
Also when this happens the tach pegs to zero, sometimes I can clutch and roll out of it, but sometimes the engine just dies
Expert:  Wayne S. replied 1 year ago.
The TPS just wears out occasionally. It mostly
happens in certain spots on the unit.
It is like a amplifier when it gets noise or static
on the volume adjuster, just wear and tear.
You have to remove the air box and lift the throttle
body to get at it. Just held on with a couple of screws
and a wire connector on it.
You will see it on the right side I believe when looking
from the rear.
You can check if the ohms reading goes up and down smoothly
or replace it if very old.
It is one of the few things that can cause problems
at a certain throttle opening like that. Especially
if the bike runs and accelerates normally otherwise.
If you had fuel problems it would not accelerate well.
You might want to check side stand switch for problems but that
would be less speed sensitive and could happen randomly.
TPS is the only speed sensitive device.
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