Throttle drops between 4-5k rpms.

1124 Views 14 Replies 8 Participants Last post by JRG2424, 12 d ago

benzimm86

Discussion Starter · Jun 12, 2020

No matter what gear I am in, if I hold the throttle between 4-5k rpms, the bike begins to jerk due to the throttle dropping. It’s for a split second and then will do it over and over while in that rpm range. I have vcyclenut flash. Any ideas?

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massrider

· #2 · Jun 13, 2020

I belive all bikes have sort of a "dead zone". my bike does the same thing (2016 FZ09).I belive it's at 4000 rpms. If I try to keep it steady at 4000 it kinda limps out sorta say. I think you will hear from alot of people on hear say the same thing. I also have David's flash.

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shamrock

· #3 · Jun 13, 2020

And this has been going on for how long?
Call David-------------------- you're welcome!

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massrider

· #4 · Jun 17, 2020

Have you gotten anywhere with this? I just had the same.exact thing happen to me. cruising along rpm between 4000-5000 and all of a sudden the bike started spuddering. First time ever happening . I'll give Vcyclenut a shout an see what he thinks.

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massrider

· #5 · Jun 17, 2020

shamrock said:
And this has been going on for how long?
Call David-------------------- you're welcome!

was told this has nothing to do with a flash.

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saturnaal

· #6 · Jun 17, 2020

This doesn't sound right. I've never experienced this when cruising around town at 4-5k RPM with the OEM flash.

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shamrock

· #7 · Jun 17, 2020

massrider said:
was told this has nothing to do with a flash.

We are assuming both you and OPs bike ran well after the flash and now they do not. That would pretty much rule out a problem with the flash. So, did David give you any ideas on what to look for? Things like the little rubber nipples on the throttle body that dry rot in a short time or a leaking air box boot.
David is smart , super helpful and is your go to guy for this stuff.

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shamrock

· #8 · Jun 17, 2020

saturnaal said:
This doesn't sound right. I've never experienced this when cruising around town at 4-5k RPM with the OEM flash.

Just curious, what is an "OEM" flash? Are you describing a stock ECU?

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massrider

· #9 · Jun 17, 2020

throttle position sensor

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saturnaal

· #10 · Jun 18, 2020

shamrock said:
Just curious, what is an "OEM" flash? Are you describing a stock ECU?

Yes, I meant stock ECU. Stock exhaust, ECU, air filter, etc. Have never experienced the issue described by OP and others in the thread.

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Crossbar1773

· #11 · Jun 18, 2020

massrider said:
throttle position sensor

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It does sound like a TPS sensor issue

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massrider

· #12 · Jun 18, 2020

have you had any experience with this? some help would be appreciated

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psycoreefer

· #13 · Jun 18, 2020

Doubt it has anything to do with the flash...I'm flashed and my bike is rock steady at ant rpm.

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northernfz09

· #14 · Jul 9, 2020

I fought the same issue.

Found this thread about condensation getting into the TPS and APS connectors. Seems to have solved my issues.

Stuttering engine at cruising speeds * SOLVED *

I love my bike, but this year it developed a problem that ruined my entire season. Symptoms: My 2014 FZ-09 has 30 000km on it and started stuttering while cruising around 30% throttle. It was getting worse as time went on. The stutter was becoming more frequent, under more riding conditions...

www.fz09.org

You will need to pull the tank and air box off, then I blew out the TPS and APS connectors, sprayed in contact cleaner, then blew them out again, let dry and finally add some dielectric grease before reconnecting the wires.

I hope this helps

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JRG2424

· #15 · 12 d ago

northernfz09 said:
I fought the same issue.

Found this thread about condensation getting into the TPS and APS connectors. Seems to have solved my issues.

Stuttering engine at cruising speeds *** SOLVED ***

I love my bike, but this year it developed a problem that ruined my entire season. Symptoms: My 2014 FZ-09 has 30 000km on it and started stuttering while cruising around 30% throttle. It was getting worse as time went on. The stutter was becoming more frequent, under more riding conditions...

www.fz09.org

You will need to pull the tank and air box off, then I blew out the TPS and APS connectors, sprayed in contact cleaner, then blew them out again, let dry and finally add some dielectric grease before reconnecting the wires.

I hope this helps

do you have a photo of what these two connectors look like,please?

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