MotoHouston.com MotoHouston.com
Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back   MotoHouston.com > General Discussion > General Discussion (Moto Related)
Forgot info?

Welcome to MotoHouston.com! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.


Like us on Facebook! Regular shirt GIVEAWAYS and more

Advertisement

Reply
Share This Thread: 
Subscribe to this Thread Thread Tools
Old 04-15-2009, 09:28 AM   #1
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






Ex500 running issue

Have the bike only for 4 months total so I'm trying to avoid sinking ANY money into it. My friend neglected maintence on it as well as I typically do so I don't have the history on the carbs, valve adjustment (think its due for that), etc. I just need it to run safe for 2 more months.

That said, something has been coming more to my attention, a possible "imbalance". I don't recall the bike doing it as much as this 2 months ago and don't know if its normal. It's an inline twin I believe so I'm new to their characteristics.

The issue is the running, especially around 5k, isn't really a "purr" or smooth, its more like the bike pulls/stops/pulls/stops.... kind of like the engine revolutions are begging you to take the rpms higher into 5-6th so you don't notice it at 75+. However you do some lower gears like 3-4 up in stop and go traffic and it keeps going back and forth like its inbalanced tugging. Instead of a purr the engine does a tug / no tug/ no tug / tug.... etc Kind of hard to explain but it just doesn't feel right... i don't remember this issue when I first got it. Suggestions? I don't know a more technical way to describe the "imbalance" i feel when riding.
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Similar Topics
Thread Thread Starter Forum Replies Last Post
Kawasaki 2007 EX500 plastics source grsa General Discussion (Moto Related) 3 07-06-2012 12:06 AM
Abandaned Ninja EX500 Red DvlRacer General Discussion (Moto Related) 5 08-23-2011 08:13 PM
ex500 siezed, what now? agentjayjay How To's and Q & A's 27 05-11-2011 12:49 PM
ex500 in garage, now won't start agentjayjay How To's and Q & A's 55 07-03-2010 09:04 PM
front brakes lock up, ex500 agentjayjay Safety Corner Main 19 08-05-2009 05:42 AM
Advertisement
Old 04-15-2009, 02:04 PM   #2
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






no comments :-( You guys are the pros. An engine running less than smoothly ??? Feels like an eliptical revolution of the engine.

"Gearing the new Kawasaki taller helps minimize vibration by reducing engine speed. Vibration is controlled by two more direct methods, rubber engine mounts and a gear-driven balancer shaft. The 500 has a 180-degree crankshaft (the pistons rise and fall alternately) and therefore perfect primary balance. But because the central cam drive requires the crankpins to be widely set apart, the EX�s engine also produces a significant rocking couple which tries to pedal the crank ends around in circles inside the cases. The balancer, running at crank speed but in the opposite direction, cancels out the rocking copple disturbance emanating from the crankshaft. The balancer does not, incidentally, deal with the far less bothersome second harmonic (or secondary imbalance) that naturally occurs in a 180-degree vertical twin"
http://www.ozzy.net/jdscott/ninja/info/ex500cycle.html
Old article, but maybe this is what I'm feeling, the "second harmonic imbalance?" WTC?


could it be i'm just noticing the imbalance of the type of engine more now? Anything that heightens that imbalance feel and that can be softened with maintence?
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 02:08 PM   #3
Redux
Senior Member
 
Redux's Avatar
 
Join Date: Jun 2008
Feedback Rating: (1)
Posts: 1,669

Experience: 2 years
Trackdays: 1

Bike(s):
grasshopper









I know its random, but is the chain tight?
Redux is offline   Reply With Quote
Old 04-15-2009, 02:14 PM   #4
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






decent, just recently adjusted has approx 1-2 inches of play I guess. It was lose before hand. How can a chain affect that, should i try tightening it more?
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 02:15 PM   #5
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






its just annoying since if I want to ride at a somewhat higher rpm in stop and go to avoid braking all the time its not a smooth ride anymore.... kind of choppy like and annoying.
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 02:18 PM   #6
SecretAgent
The one and only
 
Join Date: Sep 2005
Location: SW Houston
Feedback Rating: (1)
Posts: 1,986


Bike(s):
08 Harley FXDB Street Bob









Send a message via AIM to SecretAgent
that's what is referred to as engine surging, it's generally a carb related issue.
__________________
"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them - but I want one anyway, and on some days I actually believe I need one. That is why they are dangerous. "
-Hunter S. Thompson
SecretAgent is offline   Reply With Quote
Old 04-15-2009, 02:24 PM   #7
motomax629
Retired Baller
 
motomax629's Avatar
 
Join Date: May 2007
Location: Katy
Feedback Rating: (0)
Posts: 388

Experience: 10+ years
Trackdays: 10+

Bike(s):
05 Gixxer 1000 (track)
07 Gixxer 600 (track)
Fiddy w88 kit
WR426 TARD
74 H-D Superglide Shovelhead






Parallel twins always seen to be doing weird stuff anyway.
How many miles on the bike and how long did it sit, prior to you riding it?
__________________
I can kick Valentino Rossi's ... In a bar fight!
motomax629 is offline   Reply With Quote
Old 04-15-2009, 02:26 PM   #8
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






engine surging? Hmm. Is this something I should be ok with for 2 months or major issue? I don't want to pay the premium for his lack of paying for his own maintence. I'm paying his payments already and trying to avoid sinking money into something I'm losing in 2 months.....

i'll do some reading, since I need to educate myself on this. I've learned to take LITTLE signs on a bike as a BIG sign to find out whats going on. Ie, tire sags just a bit under weight or testing shocks, probably need to check RIGHT then. Skipped chain, check immediately for chain tension. I don't want to let something cause safety issue!
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 02:27 PM   #9
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






Quote:
Originally Posted by motomax629 View Post
Parallel twins always seen to be doing weird stuff anyway.
How many miles on the bike and how long did it sit, prior to you riding it?

24k miles. Never sits long to my knowledge. Maybe a short period of time, but nothing long. Its on 07, and he rode it in and from Cali as primary vehicle, so he's put MANY miles on it in one year. I put about 800-900 miles on the bike per month.
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 02:33 PM   #10
CaligoneTx
Forest Gnome Tour Guide
 
CaligoneTx's Avatar
 
Join Date: Sep 2007
Location: Valhalla
Feedback Rating: (1)
Posts: 21,558

Experience: 10+ years

Bike(s):
Triumph 675r
Ducati 748
Hyosungs (250r + 650r)
Honda 900rr
Suzuki Busa1300r (+2 bikes)






Send a message via AIM to CaligoneTx Send a message via Yahoo to CaligoneTx
Has this started AFTER the lass refill of gas?

Sounds like what I experienced. In my case on the Kat it was off idle situation(shared a separate circuit.) Even though I cleaned out the tank, pepcock, put stabil in with new gas and completely cleaned out the carbs with air it kept doing it.

I had some water in the gas still.

So with the new stabil gas, I let it idle until it was as toasty as possible on a hot day(air cooled) and began riding it right at the rpm where it was bucking(in a parkinglot, duh.) I kept at it and eventually it blew all the water out of it.

Whether this is the proper way or not, it worked. The next day... well, we did parade laps(see avatar lol)
__________________
triumphsig
CaligoneTx is offline   Reply With Quote
Old 04-15-2009, 02:43 PM   #11
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






? The ninja is liquid cooled I believe.

it seems too "mechinally" routine to be some bad gas?
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!

Last edited by specterunseen; 04-15-2009 at 02:47 PM.
specterunseen is offline   Reply With Quote
Old 04-15-2009, 04:12 PM   #12
pelochas
Senior Member
 
pelochas's Avatar
 
Join Date: Jan 2009
Location: Stinkadena
Feedback Rating: (0)
Posts: 234

Experience: 1 year

Bike(s):
2004 Kawasaki ZX-6R






im just throwing this up in the air but can you check the air filter? probably asking for more air and its gasping.........
pelochas is offline   Reply With Quote
Old 04-15-2009, 04:46 PM   #13
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






Quote:
Originally Posted by pelochas View Post
im just throwing this up in the air but can you check the air filter? probably asking for more air and its gasping.........
ok, i'll do that. maybe somethings clogged or causing the issue at the rpm level? i'll check and make sure nothings pinched. I'm just considered about engine and want to make sure its not a safety issue even if its as annoying as heck.
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-15-2009, 05:24 PM   #14
CaligoneTx
Forest Gnome Tour Guide
 
CaligoneTx's Avatar
 
Join Date: Sep 2007
Location: Valhalla
Feedback Rating: (1)
Posts: 21,558

Experience: 10+ years

Bike(s):
Triumph 675r
Ducati 748
Hyosungs (250r + 650r)
Honda 900rr
Suzuki Busa1300r (+2 bikes)






Send a message via AIM to CaligoneTx Send a message via Yahoo to CaligoneTx
If the situation is across all cylinders(bucking) vs a single cylinder misfire, you need to diagnose along those lines.

A rich engine will tend to not buck but be lagging and you will smell it in the exhaust.
__________________
triumphsig
CaligoneTx is offline   Reply With Quote
Old 04-15-2009, 05:32 PM   #15
Solracer
MotoHouston.com Owner.
 
Solracer's Avatar
 
Join Date: Apr 2005
Location: Kemah Area
Feedback Rating: (9)
Posts: 28,903

Experience: 10+ years
Trackdays: 10+

Bike(s):
2006 YZF600R (Street)
2009 Iron 883



Member Garage


what side of town are you on?
__________________
Chris
Solracer is offline   Reply With Quote
Old 04-16-2009, 01:33 PM   #16
specterunseen
El Brilliante
 
Join Date: Mar 2008
Location: Houston, Tx
Feedback Rating: (3)
Posts: 1,592

Experience: 1 year
Trackdays: 1

Bike(s):
Kawasaki EX250 (dead due to mechanical failure)
Kawasaki EX500 (on loan from a friend)
Pending, bikeless once the 500 gone :-(
Want Husky 510SMR or KTM 690 SMC to continue the hooligan activity






I'm near 249/grant area. I checked the chain, adjusted a bit since it seemed a little loose, so gave it 1.0-1.5 inches of travel approx. It didn't seem to really help. I'm not worried about instantaneous bike combustion and explosions, but want to know if its a major mechnical issue or it can wait the 2 months and let the other fellow deal with it
__________________
If you want to follow and stay updated on lanesharing in texas, check out this dedicated forum to this and touch base while we work on legalizing it!
specterunseen is offline   Reply With Quote
Old 04-16-2009, 02:17 PM   #17
didimao0072000
Senior Member
 
didimao0072000's Avatar
 
Join Date: Jun 2007
Location: Midtown
Feedback Rating: (0)
Posts: 746


Bike(s):
50cc metropolitan









ex500 do not have fuel filters so my guess would be some in the carbs..
didimao0072000 is offline   Reply With Quote
Old 04-16-2009, 08:49 PM   #18
JBIRD5363
Senior Member
 
JBIRD5363's Avatar
 
Join Date: Apr 2008
Location: H-TOWN
Feedback Rating: (2)
Posts: 3,179

Experience: 2 years

Bike(s):
01 50
85 Honda atc 250 sx
95 dr 650







May sound dumb but I have had it happen check the gas cap vent that is non fuel pump bike so it works off of negotive pressure or gravity feed if the gas cap isn't venting properly it will create a negitive pressure in the tank and won't let gas flow to the carbs properly
JBIRD5363 is offline   Reply With Quote
Reply


Thread Tools

Advertisement


All times are GMT -5. The time now is 01:15 AM.


MotoHouston.com is not responsible for the content posted by users.
Privacy Policy