May 21st, 2016, 05:43 PM | #1 |
ninjette.org member
Name: Joe
Location: KS
Join Date: Jun 2011 Motorcycle(s): 2009 Ninjette Posts: 58
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Low power and slipping into neutral.
A few months ago I got on the highway and eventually kicked it up to 6'th. As I did I lost a lot of power and at full acceleration was still slowing down from 60mph. I kicked it down a few gears and back up with new change, and couldn't get the bike revving higher than ~7k. After pulling over, restarting the bike (sorry, I'm a tech guy. Its all I know) it worked fine and I didn't have any more issues so I thought it was a fluke. Well a couple nights ago I was riding it again, and the same problem. I shifted into 2nd and could barely accelerate. 100% throttle gave me very little power and very low revs. I stopped and started again and everything was fine for a few minutes, and then again, right after shifting, had the same issue, and then bike went into neutral!
I rode around just a little bit longer to try and identify what was happening. Shifting up or down at the time didn't effect the low power, neither did adjusting the choke. I revved the hell out of it and it seemed to "catch" and jumped from 6k to 11k and then worked no problem. Does anyone have any leads? I love my 250 and hate to see it like this. Plus, the weathers great and I need some leaning in my life! Some info that I realized might be helpful. 2009 ninja 25r with I think 22k miles. Oil change at the beginning of the year with T6. Engine runs fine apart from this problem although my mileage is pretty low at ~45. |
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May 21st, 2016, 06:57 PM | #2 |
n00bie to wannabie
Name: Bill
Location: St Ives, BC (Shuswap Lake)
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My first guess is one cylinder is firing intermittently. Perhaps a broken wire.
If it happens again; pull over but don't try to "fix" it by revving and shifting etc. Instead; try to keep it running a few minutes then see if one header is hotter than the other. If one is hotter than the other then you know one cylinder isn't firing. Now having said that; it's safest and recommended you get it fixed before you hurl your mortal body into the arms of traffic! It could be fatal if for instance you were making a left turn between oncoming traffic! As for the shift into neutral; I'm betting it wasn't fully engaged so it kicked out of gear when the power changed or you didn't realize your foot tickled the shifter when you reacted to the change in power.
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May 21st, 2016, 07:04 PM | #3 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
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Do you park the bike inside? Or is it an outside bike? Could be water in the fuel? I agree with SLOWn60 could be a loose lead to one of the coils? Or the HT leads are loose, spark plug caps dirty.
Nothing worse than an intermediate problem, makes it hard to diagnose, just check the basics and see what that does.
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May 22nd, 2016, 05:55 AM | #4 | |
Daily Ninjette rider
Name: Hernan
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Quote:
Check for loose connections/wires, spark plugs, cool cylinder, tank's vent, water in bowls of carburetors, leaking vacuum hoses, clogged fuel filters (inside tank and exterior if any) and air filter.
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May 22nd, 2016, 02:56 PM | #5 |
ninjette.org member
Name: Joe
Location: KS
Join Date: Jun 2011 Motorcycle(s): 2009 Ninjette Posts: 58
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Those are all good leads guys, thanks a ton. I plan on riding around the neighborhood gently to see if I can replicate it again, and if so maybe I can discern if both cyliders are firing. I do keep it outside and it has rained recently, but I've ridden it fine between then and the problem. I'll check the spark plugs too to see if maybe one is fouled. I'll update you all when i get more info.
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June 5th, 2016, 11:19 PM | #6 |
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Did it pop up again?
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June 6th, 2016, 12:07 PM | #7 |
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Name: Joe
Location: KS
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Not a single issue again. Maybe it will pop up in another couple months :shrug:
I just wanted to be proactive about it before it becomes a real issue. Its time for me to get my valves checked and I know they are important (although I don't know much else about them) Is it likely they would have anything to do with this? |
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June 6th, 2016, 12:12 PM | #8 | |
n00bie to wannabie
Name: Bill
Location: St Ives, BC (Shuswap Lake)
Join Date: Sep 2015 Motorcycle(s): 2012 250R (Red), 2005 VFR800A (Red), CRF450X (Red), 2012 F800GS (Wants to be Red!) Posts: A lot.
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Quote:
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The Smart Money: #1 - ATGATT, #2 - Training (machine skills and survival skills), #3 - The bike; whatever floats yer boat with the money you have left over |
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June 6th, 2016, 12:13 PM | #9 |
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Not if it was intermittent. Valves out of adjustment could cause a drop in power at some point, but it wouldn't recover.
EDIT: What Bill said.
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June 6th, 2016, 12:22 PM | #10 |
n00bie to wannabie
Name: Bill
Location: St Ives, BC (Shuswap Lake)
Join Date: Sep 2015 Motorcycle(s): 2012 250R (Red), 2005 VFR800A (Red), CRF450X (Red), 2012 F800GS (Wants to be Red!) Posts: A lot.
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My money says you have an electrical gremlin. An intermittent break in continuity. It could be a connector or spark wire etc that may have vibrated back to a better connection or perhaps was improved by poking around and jiggling the faulty wiring. It is likely to reoccur.
If it doesn't reoccur then it's probably a bit of bad fuel that has flushed itself through or maybe water in the tank that has flushed through. That could reoccur of course but if it does reoccur: focus on the electrical. Get familiar with all your connectors, contact cleaner & dielectric grease. @Ghostt has a good, recent article on the subject. I'm sure he'll point you to it. Remember; it WILL reoccur at the most inconvenient time so be prepared!
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The Smart Money: #1 - ATGATT, #2 - Training (machine skills and survival skills), #3 - The bike; whatever floats yer boat with the money you have left over |
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June 6th, 2016, 01:16 PM | #11 |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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I didn't bother doing a write-up on applying dielectric grease, it's pretty much a straight forward job.
Just take every connector, unplug them, clean the connectors with electric contact cleaner, make sure there's no corrosion, then fill the connector with dielectric grease, especially the female plug, then plug them back together. Also do the spark plug boots as well, after you service the caps of course. If anyone needs further information please let me know.
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June 6th, 2016, 01:22 PM | #12 | |
in your machine
Name: Scott
Location: Summer Shade, Ky.
Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot.
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My write-up on servicing the spark plug caps,
Even bad plugs should do something, unless they are totally shot. Did you renew the HT leads, and disassemble the caps? Make sure you disassemble the caps, and clean them, and yes the caps get cruddy. Here my write-up, Quote:
Here's some pictures that might be helpful. I took these when I replaced the wires themselves, as it was a good time for a write-up, and the wires were OEM from 1998. Wires are just 7mm copper core, with clear silicone jacket IMPORTANT NOTICE: make sure to use a proper screwdriver, make sure it fits, as the parts are made of brass inside the spark plug caps Important notice: the wire must be screwed on the spark plug cap, note the screw like object inside the spark plug cap? Important notice: be careful to not loose the ferrules on the HT leads, these keep the wire from falling out of the coil. Below is an example of ferrules on a pressure fitting, looks familiar? Also keep in mind doing the CoPs conversation/modification, it helps eliminate the spark plug caps, HT wires, and it provides a better/stronger spark, which does allow you to open up the plug gap. Kawasaki ZX Ignition Coil Pack/ coil over plugs (CoPs) modification.
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violente et ignorantia ZX-2R BLOG Twitter and Instagram = Ghostt_Scott I'm not here to change your mind, just to inform. |
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July 1st, 2016, 08:40 PM | #13 |
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
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