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Over-revving CBR125R revs straight in at 5K

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chrisdocmun
L Plate Warrior



Joined: 12 Apr 2018
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PostPosted: 11:27 - 12 Apr 2018    Post subject: Over-revving CBR125R revs straight in at 5K Reply with quote

Please help were stuck.
Riding home and the bike just pops up the revs to 5k if not engaged.
Ok from start it now goes straight up to 5krpm we've checked the throttle cable, both the top and bottom of the cable to check all operating as it should, all is fine, no kinks etc.
We thought it may be the throttle sensor (black electronic box on the side of the carb!?) so we unplugged it to see if there was a change, apart from not being able to run with the throttle operated, it still went straight to 5k.
I'm stumped. Can anyone help out?
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Just watering the plants
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MCN
Super Spammer



Joined: 22 Jul 2015
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PostPosted: 11:32 - 12 Apr 2018    Post subject: Reply with quote

Throttle valve stuck.

Air Valve after air filter.

Throttle Body

Mibby. Confused
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Draco87
Renault 5 Driver



Joined: 04 Oct 2013
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PostPosted: 15:44 - 19 Apr 2018    Post subject: Reply with quote

Check your throttle slide, and intakes for any leaks
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1992 Yamaha SR125, 2005 Honda XR125, 1998 Yamaha XJ600S, 2000, 2004 Yamaha R6, 2002 Yamaha Fazer, 2004 Honda CBR
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MCN
Super Spammer



Joined: 22 Jul 2015
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PostPosted: 16:33 - 19 Apr 2018    Post subject: Reply with quote

Draco87 wrote:
Check your throttle slide, and intakes for any leaks


OP has either fixed it or smashed it into a rock face as he/she has not been seen since asking for help.
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