March 4th, 2020, 08:51 AM | #1 |
ninjette.org guru
Name: David
Location: Fort Worth,TX
Join Date: Nov 2015 Motorcycle(s): 2009 Ninja 250 Posts: 386
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What are my throttle bodies sub-throttle doing here?
Have another thread about a race bike I bough that I am trying to fix, as soon as I turn the power on I heard clicking.
I pull the airbox and see this https://www.dropbox.com/s/lebyb07rlh...%20PM.mov?dl=0 https://www.dropbox.com/s/m2cfysw5go...%20PM.mov?dl=0 whats going on here? Do i Need to get a new throttle body? I also ready it could be something with the ECU? I know this ECU is flashed, so maybe they modified the logic of the sub throttle? |
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March 5th, 2020, 07:09 PM | #2 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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It's perfectly normal start-up calibration. Unlike main human-controlled throttle-bodies, the sub-throttle-bodies are ECU controlled and DO NOT have TPS sensor.
So imagine you're the ECU and you're sitting in dark room with no idea what's going on in outside world. All have are multiple screens telling status of various sensors. One screen tells you air-temperature. Great! You know whether you should put on sweater or coat. Another screen tells you coolant-temperature. Awesome! Now you know whether you should dump in an extra +20% for cold-starting. Same with TPS sensor, you'll know how far the human has twisted throttle and can look up appropriate fuel and ignition-advance value on 3D maps. Now you (ECU} are in complete control of sub-throttles, but without a TPS, how would you know what position the butterflies are in? You don't!! So on start-up, you just spin stepper-motor towards closed position several times you can be sure butterflies are in closed position when engine starts. That way, if some human has messed with sub-throttles by manually manipulating it, you can be sure they're closed by spinning motor towards closed position. If butterflies are already closed, this spinning towards closed just pushes them against the stopper and causes some clicking/rattling sounds. Which is what you're hearing, perfectly normal. |
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March 5th, 2020, 07:12 PM | #3 | |
ninjette.org guru
Name: David
Location: Fort Worth,TX
Join Date: Nov 2015 Motorcycle(s): 2009 Ninja 250 Posts: 386
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Quote:
What does that one do? I am getting a radiator tomorrow, so I will be attempting to start the bike and see what happens. I was just wondering what this is doing my other FI bike doesnt make that kinda sound. |
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March 5th, 2020, 11:12 PM | #4 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Ah.... Test 2ndary TPS's closed position switch. Verify electronically that closed-position signal is properly sent to ECU. That is... signal is same at TPS AND at ECU connector.
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October 29th, 2020, 11:08 PM | #5 | ||
ninjette.org newbie
Name: Ninja 250r
Location: Philippines
Join Date: Oct 2020 Motorcycle(s): Ninja ex250r Posts: 3
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We have the same trouble how did you fix that?
Quote:
Quote:
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October 29th, 2020, 11:09 PM | #6 |
ninjette.org newbie
Name: Ninja 250r
Location: Philippines
Join Date: Oct 2020 Motorcycle(s): Ninja ex250r Posts: 3
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Did you fix that problem?
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October 29th, 2020, 11:09 PM | #7 |
ninjette.org newbie
Name: Ninja 250r
Location: Philippines
Join Date: Oct 2020 Motorcycle(s): Ninja ex250r Posts: 3
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We have the same problem right now.
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November 9th, 2020, 08:19 PM | #8 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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@Brandon2020
Clicking could be defective sub-throttle sensor. Look up in manual how to test. If bad, replace it. |
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