carburator problems

[klr6502k]

my bike appears to be flooding at various times. its will run fine for 3 times then flood and keep running so rich it stalls out unless i keep the rpm over 2500. then runs fine 10 mins later. or maybe an hour. it is NOT the float stuck open and nothing has come out the overflow that i have noticed. what is possible correct me if i am wrong. blocked air intake? (creating more vacuum raising the slide more?) leaking diaphragm on peacock (sucking gas into carb?) what else? i have swapped carbs with a loaner and still have the same problem i have swapped carbs with a loaner and still have the same problem (have to say it twice it SHOULD not be a carb problem) klr6502k

[Jeff Saline]

On Wed, 16 Sep 2009 16:50:12 -0000 "klr6502k" writes:

> my bike appears to be flooding at various times. > its will run fine for 3 times then flood and keep running so rich it > stalls out unless i keep the rpm over 2500. > then runs fine 10 mins later. or maybe an hour. > > it is NOT the float stuck open > and nothing has come out the overflow that i have noticed. > > what is possible correct me if i am wrong. > > blocked air intake? (creating more vacuum raising the slide more?) > leaking diaphragm on peacock (sucking gas into carb?) > what else? > > i have swapped carbs with a loaner and still have the same problem > i have swapped carbs with a loaner and still have the same problem > (have to say it twice it SHOULD not be a carb problem) > klr6502k

<><><><><><><><> <><><><><><><><> klr6502k, My wild guess is the petcock vacuum diaphragm has a slight tear. Sometimes it leaks fuel and sometimes it doesn't leak as much fuel. Maybe I'm right and maybe I'm not right. : ) Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT . ____________________________________________________________ Get your dream car or truck. Click here. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTLa8tfKOBLI0E8Ki5eUQAnsvmY6o2MUKUucEhHiPplKYiToRNL1aI/

[John Biccum]

I suspect Jeff's diagnosis proves correct. To test if the diaphragm is leaking you can pull the vacuum line from the petcock and examine the inside of the line. It should be free of gasoline. If gasoline is found inside the line, that gasoline came though the leaking petcock diaphragm. I had similar symptoms when I was rejetting as a result of adding the 685 kit. It seemed that the bike was too lean much of the time but at other random times is seemed much too rich . It proved to be too lean under normal conditions and too rich when raw gasoline from the leaking diaphragm ran down the petcock vacuum hose and entered the carb. If the diaphragm is leaking I would not recommend replacing the fragile diaphragm with the OEM part. Better IMHO to use a manual conversion kit or replace the petcock entirely with a Pingel. I have the Pingel and like it but it is not inexpensive. From: DSN_KLR650@yahoogroups.com [mailto:DSN_KLR650@yahoogroups.com] On Behalf Of Jeff Saline Sent: Wednesday, September 16, 2009 10:56 AM To: klr6502k@... Cc: DSN_KLR650@yahoogroups.com Subject: Re: [DSN_KLR650] what can cause flooding and how can i test? On Wed, 16 Sep 2009 16:50:12 -0000 "klr6502k" > writes:

> my bike appears to be flooding at various times. > its will run fine for 3 times then flood and keep running so rich it > stalls out unless i keep the rpm over 2500. > then runs fine 10 mins later. or maybe an hour. > > it is NOT the float stuck open > and nothing has come out the overflow that i have noticed. > > what is possible correct me if i am wrong. > > blocked air intake? (creating more vacuum raising the slide more?) > leaking diaphragm on peacock (sucking gas into carb?) > what else? > > i have swapped carbs with a loaner and still have the same problem > i have swapped carbs with a loaner and still have the same problem > (have to say it twice it SHOULD not be a carb problem) > klr6502k

<><><><><><><><> <><><><><><><><> klr6502k, My wild guess is the petcock vacuum diaphragm has a slight tear. Sometimes it leaks fuel and sometimes it doesn't leak as much fuel. Maybe I'm right and maybe I'm not right. : ) Best, Jeff Saline ABC # 4412 South Dakota Airmarshal Airheads Beemer Club www.airheads.org The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650, 79 R100RT . __________________________________________________________ Get your dream car or truck. Click here. http://thirdpartyoffers.juno.com/TGL2141/fc/BLSrjpTLa8tfKOBLI0E8Ki5eUQAnsvmY 6o2MUKUucEhHiPplKYiToRNL1aI/ [Non-text portions of this message have been removed]

[Eric J Foster]

"Climate change" causes flooding....... You been paying your portion of the taxes? Sorry, had to say it! E -- Experience is what you gain immediately after you really need it. http://wwsw.the912project.com/

[The Reverend]

It seems that using additive (ethanol mainly) free gasoline helps with the clogging issue. -----Original Message----- From: DSN_KLR650@yahoogroups.com [mailto:DSN_KLR650@yahoogroups.com] On Behalf Of Jeff Khoury The best thing to do is prevent this by riding it frequently, or draining it if it's going to sit. It is so much easier to prevent the problem than it is to fix it once it is there.