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Honda CBR F4i Bogging with 50% and above throttle

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Old Nov 2, 2016 | 05:37 PM
  #1  
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Default Honda CBR F4i Bogging with 50% and above throttle

Whats up fellas,

I hate for my first post in here to be an issue but I can't figure this one out. I have a bogging issue with anything over 35% throttle. I can slowly creep the rpms up in neutral but if i give it 50 or more it starts to crap out. Issue is also happening while riding.

When the issue arose I changed the FPR, Spark plugs and air filter. No positive effect to this problem. I have also propped the gas tank up and did a warm up and test with the same result (Which I assume will remove a pinched line theory?). I've also read that the kickstand killswitch can be an issue but im not sure if this applies in this case since the bike is in neutral?

Any ideas will be appreciated. I have searched and found other "ghost" problems of the same nature but as always no one post when they get the bike going leaving the problem unsolved to the internet.

I have included a video as well

 
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Old Nov 2, 2016 | 08:32 PM
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Check your TPS. I see that it's plugged in, but it may have dead spots.

What happens if you roll slowly past 50%?
 
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Old Nov 2, 2016 | 10:25 PM
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Originally Posted by 74demon
Check your TPS. I see that it's plugged in, but it may have dead spots.

What happens if you roll slowly past 50%?
I appreciate you responding.

When I get to about 50% I believe it starts to "bog" down. When im on the highway, I sometimes can't get above 9-10k rpm About 80-85 max.

I do have a service manual but do you have a method for checking the TPS?
 
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Old Nov 2, 2016 | 10:53 PM
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Get out the multi meter and follow the manual for testing.

Did this problem start all of a sudden?
Do you have a power commander on it?
 
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Old Nov 2, 2016 | 11:09 PM
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Originally Posted by 74demon
Get out the multi meter and follow the manual for testing.

Did this problem start all of a sudden?
Do you have a power commander on it?
Had the bike about 3-4 months now and I believe the issue has been there slowly coming on. The bogging issue has worsen in the last 2 weeks to what is in the video.

Now power commander on it but should be picking up a PC3 and switching from a muzzy slipon to a full Yoshi rs3 setup this weekend.
 
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Old Nov 3, 2016 | 08:07 PM
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TPS has checked out as far as harness side. I do not have a test harness to actually test the TPS on the bike with the ecu.

Any other suggestions?
 
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Old Nov 3, 2016 | 08:13 PM
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Are your air ducts intact? I vaguely remember someone having a similar problem that turned out to be something with the ram air duct.

Has any valve work been done?
 
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Old Nov 3, 2016 | 08:53 PM
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Both air ducts are intact left side is missing the plastic jug looking piece at the top but is connected into the box.

I have not had any valve work done to the bike. Would that cause this issue that I am having?
 
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Old Nov 3, 2016 | 10:33 PM
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If the cam timing was off, it would run pretty doggy. I doubt that that's a problem if it hasn't had an adjustment or anything, but you never know. When you did the plugs, what did the old ones look like? I hope you didn't gap the new ones if you used platinum or iridium tipped plugs.
 
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Old Nov 4, 2016 | 12:58 PM
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Plugs looked ok as far as i can tell i have a picture. I didnt gap the ngk plugs.
Anything else to check?
 
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