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Honda cb125f wrong revs

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b3ta
L Plate Warrior



Joined: 02 May 2021
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PostPosted: 16:45 - 02 May 2021    Post subject: Honda cb125f wrong revs Reply with quote
Hi,
so my 2015 cb125f after few months of winter sleep shows wrong rpm's.
Battery was dead, so I charged it and bike started fine.
I let it idle for a while to warm up and change oil.
After that I noticed that idle rpm's shows about 4000, but it doesn't sound like 4000. Usually it's about 1500 at idle.
Took it for a ride, engine revs fine but tacho doesn't really go past 5000 and then, as I accelerate, it starts to go down even to 1200.
Speedo reads fine and by sound engine revs as it should.
Wth?
It's only my second year riding, so I'm no expert on bikes.
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Nobby the Bastard
Harley Gaydar



Joined: 16 Aug 2013
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PostPosted: 16:53 - 02 May 2021    Post subject: Reply with quote
Cable or wire tacho?
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Sprint ST 1050
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b3ta
L Plate Warrior



Joined: 02 May 2021
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PostPosted: 17:07 - 02 May 2021    Post subject: Reply with quote
Wire I guess.
https://i.ebayimg.com/images/g/eVkAAOSw~5ZffuaC/s-l300.jpg
https://i.ebayimg.com/images/g/7p4AAOSwGEZffuan/s-l400.jpg
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b3ta
L Plate Warrior



Joined: 02 May 2021
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PostPosted: 17:55 - 03 May 2021    Post subject: Reply with quote
Can bad battery cause this? Haven't checked voltage on running bike yet.
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