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High rpm electrical problem

Gozy

2015
CB650F ABS
Apr 25, 2025
Riding Since
2007
Hello,

I have a problem at high RPM — when it reaches about 8,000–9,000, the ECU restarts, voltage drops, and the instrument cluster also restarts. It seems that some component goes into a short circuit. Has anyone experienced something like this? There are no DTCs.
 

FinCB650R

CB650R ABS
Jun 11, 2023
Finland
Riding Since
2023
This is just an hunch but, sounds like a voltage regulation issue. Can you check the voltage of your battery while running the bike in idle vs. revving it?
 

miweber929

2014
CBR650F
650 Alumnus
Staff
Feb 13, 2015
Woodbury, MN
Riding Since
1975
I would agree its a voltage thing and could be charging issue or a dodgy connection somewhere like a bad ground or at the battery.
 
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