Tachometer not working or going crazy

3290675 · April 19th, 2012, 07:34 AM

Hey this site is really useful and has answered most of my ninjette questions but a search hasnt really found an answer to my current problem.

My tachometer sometimes just sits at zero rpm even though the engine is revving properly. At other times whilst at speed, it'll move past the redline and fluctuate between 7000rpm to past red line. The engine rpms are fine.

If i blip the throttle, the tacho will jump 4000rpm even though in reality it only increases a little.

Any idea what is wrong or what can be done to fix this??

Many thanks in advance!

sousuke86 · April 19th, 2012, 09:30 AM

Has it been raining recently? Sounds like water has gotten into the tach and causing the power or ground to go crazy. It happened on my bike. Dry it out and it should return to normal.

Jiggles · April 19th, 2012, 09:39 AM

You might need a new battery

3290675 · April 20th, 2012, 06:00 AM

Quote:

Originally Posted by sousuke86

Has it been raining recently? Sounds like water has gotten into the tach and causing the power or ground to go crazy. It happened on my bike. Dry it out and it should return to normal.

Yeah it has been raining. It dried out today and worked normally for most of the ride, but at one stage i noticed that the tacho did not work at all. it just sat at 0rpm. could this mean a new battery is needed?

csmith12 · April 20th, 2012, 06:06 AM

My old 92 did this. New battery and cleaned terminals and problem was solved. Not sure which fixed it for me. Check yours and let us know please.

CZroe · April 30th, 2012, 05:48 AM

My tachometer has acted like that when I ran the battery completely dead and pop-started it and it has acted similarly when condensation formed inside.

DaBlue1 · April 30th, 2012, 06:17 AM

Your symptoms and remedy may lie in here- http://www.ninjette.org/wiki/Battery
"- if your lights on the Ninja 250 begin to flicker or your gauges or engine speed start to act erratically, check your battery connections"

You also may want to check your tach connections.

spc2125 · September 1st, 2014, 08:46 PM

Bump for this...

Ive been experiencing this for the past few rides. I got worse today almost to the point where the throttle no longer worked. I noted that in neutral the light was not super bright green, more like a dull green. So i bumped my butt on the seat to hit the battery and the neutral green turned bright again. It did this intermittently till I got home.

I popped the seat off to discover the ground terminal screw was loose. I tightened it up and hopefully it shall fix my problem.

Alex · September 1st, 2014, 09:11 PM

Tighten it with a socket or wrench; not just a screwdriver. Loose battery connections cause all kind of ills, and it's not uncommon for them to rattle loose if not torqued properly.

April 19th, 2012, 07:34 AM	#1
3290675 ninjette.org newbie Name: Ando Location: Sydney Join Date: Sep 2011 Motorcycle(s): Ninjette Posts: 4	Tachometer not working or going crazy Hey this site is really useful and has answered most of my ninjette questions but a search hasnt really found an answer to my current problem. My tachometer sometimes just sits at zero rpm even though the engine is revving properly. At other times whilst at speed, it'll move past the redline and fluctuate between 7000rpm to past red line. The engine rpms are fine. If i blip the throttle, the tacho will jump 4000rpm even though in reality it only increases a little. Any idea what is wrong or what can be done to fix this?? Many thanks in advance!

April 19th, 2012, 09:39 AM	#3
Jiggles Jigglin' your Jiglets Name: Sean Location: San Jose, Ca Join Date: Jun 2011 Motorcycle(s): 2009 K1300S, 2013 Ninja 300, 2011 Ninja 250R, Faster than Unregistered's ninjette Posts: Too much. Blog Entries: 1 MOTM - Apr '13	You might need a new battery __________________________________________________ If the Ninja 250 doesn't have enough power for you, then you don't know how to ride it. AFM #676 Supersports are for n00bs

April 20th, 2012, 06:06 AM	#5
csmith12 The Corner Whisperer Name: Chris (aka Reactor) Location: Northern KY Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. MOTY 2015, MOTM - Nov '12, Nov '13	My old 92 did this. New battery and cleaned terminals and problem was solved. Not sure which fixed it for me. Check yours and let us know please. __________________________________________________ Goal: Shake A Million Hands \| Look through the corners \| Track Day Prep \| Closest track? \| The Mid-Ohio School

September 1st, 2014, 09:11 PM	#9
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Tighten it with a socket or wrench; not just a screwdriver. Loose battery connections cause all kind of ills, and it's not uncommon for them to rattle loose if not torqued properly. __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

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April 19th, 2012, 09:30 AM	#2
sousuke86 ninjette.org member Name: David Location: San Diego, CA Join Date: Sep 2011 Motorcycle(s): 2011 Ninja 250R SE Posts: 78	Has it been raining recently? Sounds like water has gotten into the tach and causing the power or ground to go crazy. It happened on my bike. Dry it out and it should return to normal.

April 30th, 2012, 05:48 AM	#6
CZroe CPT Falcon Name: J.Emmett Turner Location: Newnan, GA Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.	My tachometer has acted like that when I ran the battery completely dead and pop-started it and it has acted similarly when condensation formed inside.

April 30th, 2012, 06:17 AM	#7
DaBlue1 Long Time Rider Name: Blue Location: Charlotte, NC Join Date: Sep 2010 Motorcycle(s): 2009 Kawasaki Ninja 250R Posts: A lot.	Your symptoms and remedy may lie in here- http://www.ninjette.org/wiki/Battery "- if your lights on the Ninja 250 begin to flicker or your gauges or engine speed start to act erratically, check your battery connections" You also may want to check your tach connections.

September 1st, 2014, 08:46 PM	#8
spc2125 ninjette.org member Name: Steven Location: MA Join Date: May 2013 Motorcycle(s): 10 Ninja 250 Posts: 172	Bump for this... Ive been experiencing this for the past few rides. I got worse today almost to the point where the throttle no longer worked. I noted that in neutral the light was not super bright green, more like a dull green. So i bumped my butt on the seat to hit the battery and the neutral green turned bright again. It did this intermittently till I got home. I popped the seat off to discover the ground terminal screw was loose. I tightened it up and hopefully it shall fix my problem.