Kendog
27th May 2007, 09:12
I have been following with interest the so called "Herky Jerky" throttle syndrom on the Gixxer.com site.
What is that you may ask, here is a pretty good description:
Upon the bikes first start up of the day it runs flawless with smooth power delivery and a responsive throttle from inputs of 0% to 100%. After the bike has reached its normal operating temperature, if at any time the bike is shut off, for example to fuel up, the throttle is very choppy and the bike does not run smoothly at all. It seems there is no happy medium between the throttle being on or off. This happens at any speed, gear or throttle position and seems to be brought on by heat.
I believe I have experienced this once on my bike, where the engine would seemingly loose power with the slightest roll off on the throttle.
Over the last few days there has been a possible breakthrough as to the cause and fix for this fault.
"So the part that ended up being on warranty was the solenoid attached to the fuel rail which controls the butterfly valves on the throttle bodies. I figured a couple hundred bucks to replace.... dead wrong. The entire fuel rail has to be ordered as a unit which came to a hefty price tag of $1750 CAN, not including labour. Obviously the throttle bodies had to be syncronized which I believe has lead to a smoother fuel delivery.
End result... get those fucking bikes into your mechanics/dealerships and get them to check the solenoid attached to the fuel rail... its on the TPS side. Mine was not cycling properly which constituted a wide array of problems from the butterfly valves being stuck at a certain location regardless of throttle position. As you can probably imagine, the vacume was also messed up along with the amount of fuel the bike is dumping into the cylinders' hence the ECU cutting the fuel prematurly so the bike doesn't detonate."
For more info check out this (http://www.gixxer.com/forums/showthread.php?t=139581) thread. It has links to several other threads describing the problem and from page 28 it starts talking about the fix.
Don't write this off as bad riding, or something you have to live with. If your bike has this problem, check out the thread above and contact your service department (especially before your warranty runs out)
What is that you may ask, here is a pretty good description:
Upon the bikes first start up of the day it runs flawless with smooth power delivery and a responsive throttle from inputs of 0% to 100%. After the bike has reached its normal operating temperature, if at any time the bike is shut off, for example to fuel up, the throttle is very choppy and the bike does not run smoothly at all. It seems there is no happy medium between the throttle being on or off. This happens at any speed, gear or throttle position and seems to be brought on by heat.
I believe I have experienced this once on my bike, where the engine would seemingly loose power with the slightest roll off on the throttle.
Over the last few days there has been a possible breakthrough as to the cause and fix for this fault.
"So the part that ended up being on warranty was the solenoid attached to the fuel rail which controls the butterfly valves on the throttle bodies. I figured a couple hundred bucks to replace.... dead wrong. The entire fuel rail has to be ordered as a unit which came to a hefty price tag of $1750 CAN, not including labour. Obviously the throttle bodies had to be syncronized which I believe has lead to a smoother fuel delivery.
End result... get those fucking bikes into your mechanics/dealerships and get them to check the solenoid attached to the fuel rail... its on the TPS side. Mine was not cycling properly which constituted a wide array of problems from the butterfly valves being stuck at a certain location regardless of throttle position. As you can probably imagine, the vacume was also messed up along with the amount of fuel the bike is dumping into the cylinders' hence the ECU cutting the fuel prematurly so the bike doesn't detonate."
For more info check out this (http://www.gixxer.com/forums/showthread.php?t=139581) thread. It has links to several other threads describing the problem and from page 28 it starts talking about the fix.
Don't write this off as bad riding, or something you have to live with. If your bike has this problem, check out the thread above and contact your service department (especially before your warranty runs out)