Speed sensor?

Based12 · March 26th, 2021, 10:37 AM

Hi! My recently purchased 2010 fuel injected 250R shoots an FI light sometimes past 8500 RPM.

I used the code reader (yellow cable thingy) and it drops 24 and 25, which seems to be the speed sensor, open or shorted cables.

I detached it from the bike, thoroughly cleaned it, used contact cleaner on all contacts, and the light still shows most times the engine goes past 8500 RPM.

Any idea about diagnosing it? Checked my service manual and it doesn't specify any procedure or check, it only says to buy a new speed sensor.

Thanks!

Based12 · March 28th, 2021, 09:37 AM

Could a loose chain cause it? I'm still waiting on a rear lift so I haven't put it to spec still, and the upper part of it touches the swingarm when stationary

Based12 · April 7th, 2021, 03:40 AM

Also, the light only shoots when going past those rpms while in motion. Does anyone at least know what does said speed sensor do? I can't find any info on the Internet, and I'm not keen on rolling around with a FI light on

March 26th, 2021, 10:37 AM	#1
Based12 ninjette.org member Name: Erik Location: Castellon, Spain Join Date: Mar 2021 Motorcycle(s): 2010 Kawasaki Ninja 250R, 2004 Piaggio Typhoon 50, 1992 Yamaha SR 250 Classic Posts: 10	Speed sensor? Hi! My recently purchased 2010 fuel injected 250R shoots an FI light sometimes past 8500 RPM. I used the code reader (yellow cable thingy) and it drops 24 and 25, which seems to be the speed sensor, open or shorted cables. I detached it from the bike, thoroughly cleaned it, used contact cleaner on all contacts, and the light still shows most times the engine goes past 8500 RPM. Any idea about diagnosing it? Checked my service manual and it doesn't specify any procedure or check, it only says to buy a new speed sensor. Thanks!

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March 28th, 2021, 09:37 AM	#2
Based12 ninjette.org member Name: Erik Location: Castellon, Spain Join Date: Mar 2021 Motorcycle(s): 2010 Kawasaki Ninja 250R, 2004 Piaggio Typhoon 50, 1992 Yamaha SR 250 Classic Posts: 10	Could a loose chain cause it? I'm still waiting on a rear lift so I haven't put it to spec still, and the upper part of it touches the swingarm when stationary

April 7th, 2021, 03:40 AM	#3
Based12 ninjette.org member Name: Erik Location: Castellon, Spain Join Date: Mar 2021 Motorcycle(s): 2010 Kawasaki Ninja 250R, 2004 Piaggio Typhoon 50, 1992 Yamaha SR 250 Classic Posts: 10	Also, the light only shoots when going past those rpms while in motion. Does anyone at least know what does said speed sensor do? I can't find any info on the Internet, and I'm not keen on rolling around with a FI light on