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All 650Fs Breaking up at 7k+ RPM

baugustine

2014
CBR650F
Staff
May 21, 2016
Ventura, CA
What fuel are you using?This has happen to me when there is water mixed with the fuel. Common in Thailand.

Excellent point! I should have included fuel quality in my earlier post about pressure (& volume). Take a sample in a glass jar. See if anything settles to the top or bottom. Also smell it. Bad fuel has a ”unique” odor.
 

ECHELONWARRIOR

2020
CB650R ABS
Aug 22, 2020
orlando, fl
Riding Since
2019
any update on this? getting a similar issue at 9800rpm under full load i can hear the exhaust breaking up couldnt hear it on a stock exhaust but with my black widow i can
 

kylehondarider

2015
CBR650F
Aug 23, 2018
Did had any fix on this issue please?
Hey sorry I've been inactive, I crashed the bike in Dec 😢 but damage was pretty minor. I have not resolved the issue but recently talked to a mechanic that does dyno tuning and he made it sound like that should fix the issue. I plan to get it tuned before summer. Regarding fuel questions in the last few comments, I've always run premium 91 or 93 octane in the bike.
 
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Drdr_4nl

2018
CBR650F ABS
Apr 8, 2022
Cairo
Riding Since
2020
Hey sorry I've been inactive, I crashed the bike in Dec 😢 but damage was pretty minor. I have not resolved the issue but recently talked to a mechanic that does dyno tuning and he made it sound like that should fix the issue. I plan to get it tuned before summer. Regarding fuel questions in the last few comments, I've always run premium 91 or 93 octane in the bike.
Sorry to hear that! I hope you are fine.
 
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kylehondarider

2015
CBR650F
Aug 23, 2018
Sorry to hear that! I Joe you are fine.
Thanks! I'm pretty much fully recovered now, the bike turned out a lot better than I did. I lost traction in a corner and high-sided, broke my right elbow and 3 other places in my arm and had surgery. The bike was all cosmetics pretty much. I put new tires on it and I've been back riding the last few days. I'm still collecting all the parts needed as budget allows.
 

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Drdr_4nl

2018
CBR650F ABS
Apr 8, 2022
Cairo
Riding Since
2020
Thanks! I'm pretty much fully recovered now, the bike turned out a lot better than I did. I lost traction in a corner and high-sided, broke my right elbow in 4 places and had surgery on it. The bike was all cosmetics pretty much. I put new tires on it and I've been back riding the last few days. I'm still collecting all the parts needed as budget allows.
OMG!! That is too bad, ride safe and take care. Put some safety jackets and gear.
 
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