Tach and speed off??

Animal78 · July 26th, 2023, 02:56 PM

I have gotten another 250 this time a good running one. My only thing and I noticed it almost immediately the tach vs speed seem off? 60mph 8K rpm. I know I’m sixth gear that can’t be right and I did a bit of research on the ignition box causing the issue. Which brings me to the more important question is the tach just off or are the actual rpm’s that high? Does it do any damage to leave it as it is? At least for the rest of this riding season? Or is it screwing up the timing and such?

DannoXYZ · July 27th, 2023, 01:27 PM

what year? early new-gens had issue with tach.

Animal78 · July 27th, 2023, 03:02 PM

2012

DannoXYZ · July 27th, 2023, 07:18 PM

That's about right...

https://gearingcommander.com shows 65mph @ 8K-rpm.

Verify you've got stock gearing F/R. When I went to 16t front-sprocket, 65mph was around 7K-rpm.

Animal78 · July 28th, 2023, 08:34 AM

Once I get it back road legal and registered I will give it a go and report back. Thanks!

Animal78 · July 31st, 2023, 04:34 PM

Ok to report back it’s definitely off. 60 is at about 8K and 65 9k. That’s the indicated speed on the bike so I figure 65 is probably closer to about 60.

So far in my very short ride (12 miles) the bike runs great. I haven’t really pushed it into any turns I am still breaking in the sport demons I put on.

Animal78 · August 1st, 2023, 03:33 PM

Ok so a much longer ride today and as the temp goes up so does the tach reading. At one point I was seeing 9k at 60mph. Most of my commute is through some nice road with some higher speed turns and it’s strange to see it reading almost 11k at 70mph.

Also noted is the fuel gauge being off? Filled full and wouldn’t go past 3/4th of the gauge.

Animal78 · August 10th, 2023, 07:02 PM

Well I checked the gearing and it’s stock 14/45 my tach is way off at least a thousand rpm’s higher than it should read. It goes exponentially not linearly off so it’s hard to gauge. I have also noticed somewhat poor fuel mileage. I got roughly 200 miles on 4 gallons! I should be able to stretch it a bit more than that. Even flogging it I figured I would be around 60mpg.

Does this sound like the cdi controller issue?

Triple Jim · August 10th, 2023, 07:15 PM

With carbs working properly, my daughter gets high 60s in normal, fairly conservative riding. She's small. Try a conservative tankful and see what you get.

Animal78 · August 11th, 2023, 03:25 PM

I should mention I do not live anywhere near flat ground everything is a hill lol.

Triple Jim · August 11th, 2023, 07:48 PM

She gets high 60s out in western NC in the Smokies.

Animal78 · August 12th, 2023, 11:55 AM

I am near Charlotte I travel back and forth to work. I probably ride it a bit harder than most though. And I do spend a little bit of time in traffic when I get close to work. Near Charlotte Motor Speedway.

Animal78 · August 16th, 2023, 07:06 PM

Well so far I have not seen any improvement in fuel mileage. I had a slight drop on the last tank I only managed 48.8mpg. This was just after installing new brake pads though and they were a bit tight at first took a day or two to wear them in. I also went ahead and pulled the chain off the bike to give it a very thorough cleaning and lubing job. We will see tomorrow how it affects my mileage. The one thing staying constant is me at roughly 175-178 pounds in gear with a backpack. I have not altered my riding style at all. I ride pretty much full on when I am able and otherwise I stay steady speeds on the two way roads I travel.

The tach is absolutely way off. At 60 gps indicated and oddly enough my speedometer reads correctly within 1mph of the gps I am nearly 9k on the tach. 70mph pushes it to almost 11k. So I am guessing either the tach is busted or my cdi signal is funky. I may try another cdi soon.

July 26th, 2023, 02:56 PM	#1
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Tach and speed off?? I have gotten another 250 this time a good running one. My only thing and I noticed it almost immediately the tach vs speed seem off? 60mph 8K rpm. I know I’m sixth gear that can’t be right and I did a bit of research on the ignition box causing the issue. Which brings me to the more important question is the tach just off or are the actual rpm’s that high? Does it do any damage to leave it as it is? At least for the rest of this riding season? Or is it screwing up the timing and such?

July 27th, 2023, 07:18 PM	#4
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	That's about right... https://gearingcommander.com shows 65mph @ 8K-rpm. Verify you've got stock gearing F/R. When I went to 16t front-sprocket, 65mph was around 7K-rpm.
	1 out of 1 members found this post helpful.

July 28th, 2023, 08:34 AM	#5
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Once I get it back road legal and registered I will give it a go and report back. Thanks!
	1 out of 1 members found this post helpful.

July 31st, 2023, 04:34 PM	#6
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Ok to report back it’s definitely off. 60 is at about 8K and 65 9k. That’s the indicated speed on the bike so I figure 65 is probably closer to about 60. So far in my very short ride (12 miles) the bike runs great. I haven’t really pushed it into any turns I am still breaking in the sport demons I put on.
	1 out of 1 members found this post helpful.

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July 27th, 2023, 01:27 PM	#2
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	what year? early new-gens had issue with tach.

July 27th, 2023, 03:02 PM	#3
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	2012

August 1st, 2023, 03:33 PM	#7
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Ok so a much longer ride today and as the temp goes up so does the tach reading. At one point I was seeing 9k at 60mph. Most of my commute is through some nice road with some higher speed turns and it’s strange to see it reading almost 11k at 70mph. Also noted is the fuel gauge being off? Filled full and wouldn’t go past 3/4th of the gauge.

August 10th, 2023, 07:02 PM	#8
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Well I checked the gearing and it’s stock 14/45 my tach is way off at least a thousand rpm’s higher than it should read. It goes exponentially not linearly off so it’s hard to gauge. I have also noticed somewhat poor fuel mileage. I got roughly 200 miles on 4 gallons! I should be able to stretch it a bit more than that. Even flogging it I figured I would be around 60mpg. Does this sound like the cdi controller issue?

August 10th, 2023, 07:15 PM	#9
Triple Jim Guy Who Enjoys Riding Name: Jim Location: North Carolina Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot. MOTM - Oct '18, Aug '17, Aug '16	With carbs working properly, my daughter gets high 60s in normal, fairly conservative riding. She's small. Try a conservative tankful and see what you get.

August 11th, 2023, 03:25 PM	#10
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	I should mention I do not live anywhere near flat ground everything is a hill lol.

August 11th, 2023, 07:48 PM	#11
Triple Jim Guy Who Enjoys Riding Name: Jim Location: North Carolina Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot. MOTM - Oct '18, Aug '17, Aug '16	She gets high 60s out in western NC in the Smokies.

August 12th, 2023, 11:55 AM	#12
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	I am near Charlotte I travel back and forth to work. I probably ride it a bit harder than most though. And I do spend a little bit of time in traffic when I get close to work. Near Charlotte Motor Speedway.

August 16th, 2023, 07:06 PM	#13
Animal78 ninjette.org member Name: Larry Location: Albemarle NC Join Date: Feb 2011 Motorcycle(s): 08 Ninja 250(sold) 2000 Ninja 250 (sold) 2012 Ninja 250r 2020 Harley Sportster (rarely ridden) Posts: 104	Well so far I have not seen any improvement in fuel mileage. I had a slight drop on the last tank I only managed 48.8mpg. This was just after installing new brake pads though and they were a bit tight at first took a day or two to wear them in. I also went ahead and pulled the chain off the bike to give it a very thorough cleaning and lubing job. We will see tomorrow how it affects my mileage. The one thing staying constant is me at roughly 175-178 pounds in gear with a backpack. I have not altered my riding style at all. I ride pretty much full on when I am able and otherwise I stay steady speeds on the two way roads I travel. The tach is absolutely way off. At 60 gps indicated and oddly enough my speedometer reads correctly within 1mph of the gps I am nearly 9k on the tach. 70mph pushes it to almost 11k. So I am guessing either the tach is busted or my cdi signal is funky. I may try another cdi soon.