Tank under pressure and bike wont start

Shawn250 · May 13th, 2012, 11:40 AM

Ok so if you let the bike warm up it will die and wont restart. If you open the gas tank there is pressure. I pulled the kleen air system and pluged all the connections. As soon as you open the tank the bike will restart. I put a new exhaust system and k@n pod and rejetted the carb.

Momaru · May 13th, 2012, 11:54 AM

Regarding the refusal to restart, quite normal. There's a mod over on kawiforums that opens up the venting in the cap by just drilling it out to make the tank stop whining; may also fix this issue but no guarantee.

Regarding it dying if you let it warm up, it shouldn't be doing that. How warm is it getting? Assume you've checked coolant, etc. Probably shouldn't be sitting in place while running more than a couple minutes. These bikes are liquid-cooled, but they do need moving air to cool the liquid

Shawn250 · May 13th, 2012, 12:34 PM

Just letting it run a few min while we were getting our gear on. It just died and could not get it to restart. So i parked it figured it was a carb problem and would mess with it this morning. Thats when i opened the tank up. If were riding it shouldnt pressure up right. I dont need it to die in the wife while shes riding it.

CZroe · May 13th, 2012, 01:04 PM

My experience has been that it stalls and won't restart until you open it after a different scenario:
It has been fully warmed, allowed to cool about 15 minutes, then run hard (usually dies within a couple blocks).

Momaru · May 13th, 2012, 01:42 PM

Just make sure to vent the pressure before you get going if you let it warm up a while. I typically just crank up (with choke as needed), let it warm for ~1m whle I put on my helmet & gloves, then go, decreasing choke as it warms while riding.

My experience has been somewhat similar to Jet's though, usually vapor-lock after a hard ride and let sit for 5-10min, like a highway rest stop. Starts sputtering as the carb bowls exhaust their fuel supply & can't draw from tank due to excess pressure.

Only happened to me maybe a dozen times in over 22,000mi though.

May 13th, 2012, 11:40 AM	#1
Shawn250 ninjette.org member Name: Shawn Location: Winnemucca Join Date: Mar 2012 Motorcycle(s): 07' ZX14 10' 250 96' CBR 600 Posts: 12	Tank under pressure and bike wont start Ok so if you let the bike warm up it will die and wont restart. If you open the gas tank there is pressure. I pulled the kleen air system and pluged all the connections. As soon as you open the tank the bike will restart. I put a new exhaust system and k@n pod and rejetted the carb.

May 13th, 2012, 11:54 AM	#2
Momaru ninjette.org certified postwhore Name: Paul Location: Roanoke, VA Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.	Regarding the refusal to restart, quite normal. There's a mod over on kawiforums that opens up the venting in the cap by just drilling it out to make the tank stop whining; may also fix this issue but no guarantee. Regarding it dying if you let it warm up, it shouldn't be doing that. How warm is it getting? Assume you've checked coolant, etc. Probably shouldn't be sitting in place while running more than a couple minutes. These bikes are liquid-cooled, but they do need moving air to cool the liquid __________________________________________________ Proud member of the Blue Army

May 13th, 2012, 01:42 PM	#5
Momaru ninjette.org certified postwhore Name: Paul Location: Roanoke, VA Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.	Just make sure to vent the pressure before you get going if you let it warm up a while. I typically just crank up (with choke as needed), let it warm for ~1m whle I put on my helmet & gloves, then go, decreasing choke as it warms while riding. My experience has been somewhat similar to Jet's though, usually vapor-lock after a hard ride and let sit for 5-10min, like a highway rest stop. Starts sputtering as the carb bowls exhaust their fuel supply & can't draw from tank due to excess pressure. Only happened to me maybe a dozen times in over 22,000mi though. __________________________________________________ Proud member of the Blue Army

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
- - -Bike Wont Start - - -	Triple R	2008 - 2012 Ninja 250R Tech Talk	1	July 31st, 2014 06:54 AM
Friend's bike wont start... ideas?	setasai	General Motorcycling Discussion	7	August 3rd, 2011 07:41 PM
bike wont start after new flasher relay	onizthegnome	2008 - 2012 Ninja 250R Tech Talk	7	December 12th, 2010 12:32 PM
Bike wont start, please help?	zev42	2008 - 2012 Ninja 250R Tech Talk	11	November 9th, 2010 01:02 PM
uhh, bike wont start.	ajaygraci	2008 - 2012 Ninja 250R Tech Talk	37	June 24th, 2009 06:39 PM

May 13th, 2012, 12:34 PM	#3
Shawn250 ninjette.org member Name: Shawn Location: Winnemucca Join Date: Mar 2012 Motorcycle(s): 07' ZX14 10' 250 96' CBR 600 Posts: 12	Just letting it run a few min while we were getting our gear on. It just died and could not get it to restart. So i parked it figured it was a carb problem and would mess with it this morning. Thats when i opened the tank up. If were riding it shouldnt pressure up right. I dont need it to die in the wife while shes riding it.

May 13th, 2012, 01:04 PM	#4
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 experience has been that it stalls and won't restart until you open it after a different scenario: It has been fully warmed, allowed to cool about 15 minutes, then run hard (usually dies within a couple blocks).