rev counter acting funny

[db-89]

The rpm gauge on my DC2 sometimes acts funny. over 5000 it can go jumpy AF but other times its perfect. nothing is off with performance ,no jumpy idle missfires. im new to hondas so totally lost.
Any help would be greatly appreciated

 

[Leej8]

Most of the times with bad rpm gage it's down to dizzy,
The icm or coil is faulty/going bad ,
Or bad wiring,

 

[db-89]

Most of the times with bad rpm gage it's down to dizzy,
The icm or coil is faulty/going bad ,
Or bad wiring,

A1 ted,ill pull it off the weekend and have a gander. hoping its just a bad connection

 

[DC17]

Had same issue more then likely dizzy , my rotor arm bolt came off and bounced around inside

 

[db-89]

its weird because there is no pattern to it,car drives perfect still but ill pull the dizzy apart and have a look inside. could be corrosion