fuel line diaphragm

jamese · Post by **jamese** » Mon Jun 16, 2008 7:51 pm

anyone know of a supplier of a kit for the fuel line diaphragm used on a 1980 or have a good substitute?what are my options?

thanks

steve murdoch icoa #5322 · Mon Jun 16, 2008 8:12 pm

Welcome to the site, Jamese.
I am not sure what it is you are looking for but www.siriusconinc.com has tons of carbs parts. If not, i am sure one of the big suppliers will have it.
Tims or CBXman.

jamese · Post by **jamese** » Mon Jun 16, 2008 9:51 pm

thanks steve,but they do not offer one.
does anyone have any experience with a "pulse pump".i do not want to hydro lock this bike but the fuel valve seems poor at best and an electric fuel pump,at first glance,would seem like a good option

EMS · Post by **EMS** » Tue Jun 17, 2008 7:11 am

I am using a $15.00 junkyard GPZ electric fuel pump on my Kawasaki KZ1300 to keep the carbs primed because the KZ is a notoriously bad starter and the engine radiates a lot of heat up to the carbs and the fuel evaporates when the bike is parked. It works fine. Never thought about using one on the CBX, though. Preventing hydro lock can be achieved by religiously closing the petcock and modifying the carb overflow tubes. This way, you can eliminate the vacuum valve.

cbxtacy · Post by **cbxtacy** » Tue Jun 17, 2008 8:59 am

I use these and have never had a problem, plus they're cool looking.
http://www.pingelonline.com/powerflo.htm

jamese · Post by **jamese** » Tue Jun 17, 2008 9:23 am

EMS wrote:I am using a $15.00 junkyard GPZ electric fuel pump on my Kawasaki KZ1300 to keep the carbs primed because the KZ is a notoriously bad starter and the engine radiates a lot of heat up to the carbs and the fuel evaporates when the bike is parked. It works fine. Never thought about using one on the CBX, though. Preventing hydro lock can be achieved by religiously closing the petcock and modifying the carb overflow tubes. This way, you can eliminate the vacuum valve.

i got the idea after reading about the kz problem.they listed a part # and i am going to call on it today.it sounds like the pulse pumps deliver volume but no pressure.i wish i could say i will always turn the petcock off but i have made promises before.what mods need to be done to the overflow tubes?

thanks

cbxtacy · Post by **cbxtacy** » Tue Jun 17, 2008 9:41 am

you can use hypnosis to remember to shut off the fuel valve but don't under any circumstances use your wife to hypnotize you. Gotta go now and vacumm the rugs, do the dishes, clean the windows, and then I can have breakfast.

dan1995 · Post by **dan1995** » Tue Jun 17, 2008 10:23 am

your getting sleepy george very sleepy

EMS · Post by **EMS** » Tue Jun 17, 2008 3:23 pm

jamese wrote:[ .what mods need to be done to the overflow tubes?

thanks

The overflow tubes need to be separated to prevent fuel flow from the higher carbs back into No1 when the bike is leaned on the side stand.

Terry · Post by **Terry** » Tue Jun 17, 2008 3:26 pm

Mine on the 79 are that way and I still turn off the petcock.

EMS · Post by **EMS** » Tue Jun 17, 2008 5:07 pm

Terry wrote:Mine on the 79 are that way and I still turn off the petcock.

That is the way you should do it. Turning the petcock off will prevent fuel flow into any float chamber. Separating the overflows will prevent fuel flow from float chambers 2 and 3 into 1, which can happen even if the petcock is closed, of course.