Bad stumble/hesitation

Cedilla · October 15th, 2009, 06:18 PM

My bike had been sitting all week due to the rain, when I took it to the store a few minutes ago. I let it warm up as I was gearing up and zipping the liners in my jacket. When I took off it was reving fine like it was warmed up, except between 4-6k when it would just fall on its face at WOT, I went for a short 10min ride riding the hell out of it assuming it would fix it, and it did.

Anyone else have this problem after its been sitting for a few days? Its sat about this long once before and I had a lot of trouble starting it, but it ran fine once warmed up, this time it started up fine, but was running like crap between 4-6k RPM.

M-Oorb · October 15th, 2009, 06:27 PM

Possibly it wasn't fully warmed up? Thats the only thing that I can think of since further riding seemed to get rid of the hesitation

Cedilla · October 15th, 2009, 06:33 PM

Thats what im thinking, but usually when its not warmed up it will just die anytime I give it full throttle below 7 or 8k, tonight I could give it full throttle right from the get go and then it would just want to die, right as I hit 4k, it just seemed so well defined.

bob706 · October 15th, 2009, 06:55 PM

I have had similar instances. One time in particular, after riding for a mile the bike died at a light. Pushed it out of the street and let it get to temp and no problems. I've ridden to work with no problems only to take a ride at lunch and have to wait for it to warm up because it would bog out. But warm up issues seem to come and go, rain or shine. Let it warm up five-ten minutes and you should be alright.

killerkay3 · October 15th, 2009, 07:31 PM

my bike does the same thing if I dont let it warm up for long enough

CZroe · October 15th, 2009, 11:20 PM

Definitely the cold-blooded aspect. They all do this to varying degrees. Mine takes over 10mins to properly warm up w/o choke (as the experts say to do).

OldGuy · October 16th, 2009, 09:52 AM

First off I'm not going to broad brush you all as having your first bike going into the first seasonal change but - that could be the issue.

First - Ninja's are cold blooded and if the majority of your experience has been on relatively warm days you haven't experienced the need for the choke to start and for the bike to be fully warmed up (~10 min of street riding) to run like it did during the summer.

Second - most people are used to FI vehicles and most of the issues with internal combustion vehicles and temperature changes are handled by the FI and engine computers. You don't experience the problems with hard start, stumbling, sluggish performance until warmed up.

Third - and most important FUEL. If you live in an area that is starting to have large temperature swings you are going to be more prone to moisture condensation in the gas tank. Even if you have good gas, with a partial tank you have an air space and as the temperature goes down at night with the right humidity level and temperature (dew point) the water will form on the inside of the tank. Keep the tank level up and DO NOT use any of the Ethanol fuels since they like to absorb the water.

Cold weather - use the choke to start, some choke until fully warmed up, and full tank of gas. Use Sta Bil or Sea Foam to keep the water problem at a minimum.

CZroe · October 16th, 2009, 07:25 PM

Where do you find guaranteed E0?

addy126 · October 16th, 2009, 08:18 PM

Don.. here's the problem in Dallas and Tarrant counties. They have mandated that all gas stations sell only ethanol added fuel. You can't find a 1 that is providing the old fashioned 100% unleaded gasoline. Therefore its impossible to do. Seems the counties are trying to reduce emissions for the govt dole out for roads improvements, etc. Sooooooooo down here we are screwed due to the current levels of air pollution swirling thru Texas. I'm wondering about usin Stabil tho to compensate. Seafoam hasn't been the best solution to this problem I too have been experiencing.

ScorpionNinja · October 16th, 2009, 08:23 PM

Guys.... shim carbs, blah blah,
FACT: engines that use Carburators WILL bog,act funny in moist,cold dry aired weather,etc!!!

Anyone ever have a older truck/car WITHOUT FI?
I had a Monte Carlo SS, and boy the Cold weather made it hard to start,run,etc at times! Its just a part of life. Your Not gonna get a Carb'ed Engine to Perform like a FI engine!

Ill also add that ALL the Mowers and Machines at my Work, are Carb'ed and are a Bitch to Start Now till and through Winter! Specially when its FREEZEING outside... we go out to the pullbarn where our machines are outta the openweather, but subjected to the cold, and sometimes the Choke cables freeze up, even with spraying them with wd-40 before winter. most of the time we have to hook up the Torpedo Heater, aim and BLAST it right at the Motor and let it sit for 20mins to heat up the engine,the oil inside,etc... then i sometimes starts!
Our work dont have the budget to have a Heated pullbarn, get all-new machines,etc!

ok rant is over!

TrueFaith · October 17th, 2009, 07:25 AM

The lack of FI is about the only thing I don't like about my Ninja after 2 seasons of riding. Carbed bikes seem so...prehistoric in this day and age. I can live with it given the bike's numerous outstanding features.

Don't be revving your throttle too high when the bike isn't warmed up yet. Cold engines don't like that.

My bike starts like clockwork every time. Full choke, gradually reduced over about 3 minutes until the engine is purring along unassisted at 1500rpm and that's it.

OldGuy · October 17th, 2009, 05:29 PM

Quote:

Originally Posted by ScorpionNinja

Guys.... shim carbs, blah blah,
FACT: engines that use Carburators WILL bog,act funny in moist,cold dry aired weather,etc!!!

Quote:

Originally Posted by TrueFaith

Don't be revving your throttle too high when the bike isn't warmed up yet. Cold engines don't like that.

My bike starts like clockwork every time. Full choke, gradually reduced over about 3 minutes until the engine is purring along unassisted at 1500rpm and that's it.

I know many are left with nothing but some variation of Ex fuel. As TrueFaith said start on full choke and take it easy until you are warmed up. Yea it's a pain but here is something else to think about. If the weather is cold enough that the Ninja is stumbling a little guess what else is cold and you don't what problems from

If you said your tires give yourself a pat on the back . . . Hey maybe that's it, an engineering design feature to keep you safe in cold weather; bike can't make good torque until engine is warm and by that time the tires should have some heat in them - naaa.

October 15th, 2009, 06:18 PM	#1
Cedilla ninjette.org sage Name: Chris Location: Huntsville, AL Join Date: May 2009 Motorcycle(s): 2009 Ninja 250 (sold) Posts: 755	Bad stumble/hesitation My bike had been sitting all week due to the rain, when I took it to the store a few minutes ago. I let it warm up as I was gearing up and zipping the liners in my jacket. When I took off it was reving fine like it was warmed up, except between 4-6k when it would just fall on its face at WOT, I went for a short 10min ride riding the hell out of it assuming it would fix it, and it did. Anyone else have this problem after its been sitting for a few days? Its sat about this long once before and I had a lot of trouble starting it, but it ran fine once warmed up, this time it started up fine, but was running like crap between 4-6k RPM.

October 15th, 2009, 06:27 PM	#2
M-Oorb ninjette.org sage Name: Matt Location: South East Florida/Rutgers University Join Date: Dec 2008 Motorcycle(s): 2008 250r (Fastest Color) Posts: 914	Possibly it wasn't fully warmed up? Thats the only thing that I can think of since further riding seemed to get rid of the hesitation __________________________________________________ Pictures of my ninjette plus...

October 15th, 2009, 07:31 PM	#5
killerkay3 =°°= Name: Imran Location: Bergen County, NJ Join Date: Sep 2009 Motorcycle(s): 2009 Yamaha R6 / 2008 Green Ninja 250 (Sold) Posts: 103	my bike does the same thing if I dont let it warm up for long enough __________________________________________________

October 16th, 2009, 09:52 AM	#7
OldGuy Live Life Name: Don Location: Lincoln, NE Join Date: Nov 2008 Motorcycle(s): 2009 Green SE Ninja 250 Posts: A lot.	First off I'm not going to broad brush you all as having your first bike going into the first seasonal change but - that could be the issue. First - Ninja's are cold blooded and if the majority of your experience has been on relatively warm days you haven't experienced the need for the choke to start and for the bike to be fully warmed up (~10 min of street riding) to run like it did during the summer. Second - most people are used to FI vehicles and most of the issues with internal combustion vehicles and temperature changes are handled by the FI and engine computers. You don't experience the problems with hard start, stumbling, sluggish performance until warmed up. Third - and most important FUEL. If you live in an area that is starting to have large temperature swings you are going to be more prone to moisture condensation in the gas tank. Even if you have good gas, with a partial tank you have an air space and as the temperature goes down at night with the right humidity level and temperature (dew point) the water will form on the inside of the tank. Keep the tank level up and DO NOT use any of the Ethanol fuels since they like to absorb the water. Cold weather - use the choke to start, some choke until fully warmed up, and full tank of gas. Use Sta Bil or Sea Foam to keep the water problem at a minimum. __________________________________________________ - ATGATT - Scorpion EX700 Hi-Vis Helmet, First Gear MeshTek 3.0 Jacket, TourMaster Transition 2 Jacket and Flex Pants, Sidi Doha boots

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October 15th, 2009, 06:33 PM	#3
Cedilla ninjette.org sage Name: Chris Location: Huntsville, AL Join Date: May 2009 Motorcycle(s): 2009 Ninja 250 (sold) Posts: 755	Thats what im thinking, but usually when its not warmed up it will just die anytime I give it full throttle below 7 or 8k, tonight I could give it full throttle right from the get go and then it would just want to die, right as I hit 4k, it just seemed so well defined.

October 15th, 2009, 06:55 PM	#4
bob706 ninjette.org certified postwhore Name: Sean Location: Mary Esther, FL Join Date: Jan 2009 Motorcycle(s): 2008 Ninja 250 1998 HD Road King Posts: A lot.	I have had similar instances. One time in particular, after riding for a mile the bike died at a light. Pushed it out of the street and let it get to temp and no problems. I've ridden to work with no problems only to take a ride at lunch and have to wait for it to warm up because it would bog out. But warm up issues seem to come and go, rain or shine. Let it warm up five-ten minutes and you should be alright.

October 15th, 2009, 11:20 PM	#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.	Definitely the cold-blooded aspect. They all do this to varying degrees. Mine takes over 10mins to properly warm up w/o choke (as the experts say to do).

October 16th, 2009, 07:25 PM	#8
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.	Where do you find guaranteed E0?

October 16th, 2009, 08:18 PM	#9
addy126 ninjette.org certified postwhore Name: addy126 Location: Tx Join Date: May 2009 Motorcycle(s): '09 Kawasaki N-250 + '09 Vulcan 900 Classic Lt Posts: A lot.	Don.. here's the problem in Dallas and Tarrant counties. They have mandated that all gas stations sell only ethanol added fuel. You can't find a 1 that is providing the old fashioned 100% unleaded gasoline. Therefore its impossible to do. Seems the counties are trying to reduce emissions for the govt dole out for roads improvements, etc. Sooooooooo down here we are screwed due to the current levels of air pollution swirling thru Texas. I'm wondering about usin Stabil tho to compensate. Seafoam hasn't been the best solution to this problem I too have been experiencing.

October 16th, 2009, 08:23 PM	#10
ScorpionNinja ninjette.org certified postwhore Name: Dave Location: Michigan Join Date: May 2009 Motorcycle(s): 2009 Kawasaki Ninja 650RTE & 2009 Kawasaki Ninja 250R (SOLD) Posts: A lot.	Guys.... shim carbs, blah blah, FACT: engines that use Carburators WILL bog,act funny in moist,cold dry aired weather,etc!!! Anyone ever have a older truck/car WITHOUT FI? I had a Monte Carlo SS, and boy the Cold weather made it hard to start,run,etc at times! Its just a part of life. Your Not gonna get a Carb'ed Engine to Perform like a FI engine! Ill also add that ALL the Mowers and Machines at my Work, are Carb'ed and are a Bitch to Start Now till and through Winter! Specially when its FREEZEING outside... we go out to the pullbarn where our machines are outta the openweather, but subjected to the cold, and sometimes the Choke cables freeze up, even with spraying them with wd-40 before winter. most of the time we have to hook up the Torpedo Heater, aim and BLAST it right at the Motor and let it sit for 20mins to heat up the engine,the oil inside,etc... then i sometimes starts! Our work dont have the budget to have a Heated pullbarn, get all-new machines,etc! ok rant is over!

October 17th, 2009, 07:25 AM	#11
TrueFaith ninjette.org sage Name: Wayne Location: Brookfield, MA Join Date: Nov 2008 Motorcycle(s): 2011 Honda CBR250R Posts: 585	The lack of FI is about the only thing I don't like about my Ninja after 2 seasons of riding. Carbed bikes seem so...prehistoric in this day and age. I can live with it given the bike's numerous outstanding features. Don't be revving your throttle too high when the bike isn't warmed up yet. Cold engines don't like that. My bike starts like clockwork every time. Full choke, gradually reduced over about 3 minutes until the engine is purring along unassisted at 1500rpm and that's it.