TOPIC:

i just got a 78 kz400 and it won't fire,ben stored fr 19 yrs anyway ot will run on carb cleaner but when i hook up the gad tank to it it just pours it out the vent tube and overflow on the one carb nothin fro, the other and nothin happens any idea?

richie1 wrote:

i just got a 78 kz400 and it won't fire,ben stored fr 19 yrs anyway ot will run on carb cleaner but when i hook up the gad tank to it it just pours it out the vent tube and overflow on the one carb nothin fro, the other and nothin happens any idea?

Does the '78 have a vacuum-based petcock (instead of gravity)? If so, you may be accidentally leaving it on "prime" or something...

Either way, it sounds like the float (in the bowl) isn't working, most likely due to years of sitting in gummed up gas!! Looks like they need to come off and get cleaned....

theres 2 hoses off the petcock one thats wet and ones always dry the dry one is smaller then the larger one...if that helps?

floats sticking,dont tell wired george i said this but try banging on bottem of carbs with a screwdriver or hammer handle.

ive already got them off and ordered a rebuilt kit assuming that they needed it so from ur responses i think i go ahaead and rebuild, and hope it works

thanks any more tips or tricks are cool

wireman wrote:

floats sticking,dont tell wired george i said this but try banging on bottem of carbs with a screwdriver or hammer handle.

You have a spycam in my garage?

steell wrote:

wireman wrote:

floats sticking,dont tell wired george i said this but try banging on bottem of carbs with a screwdriver or hammer handle.

You have a spycam in my garage?

great now WiredGeorge is gonna have us both going to carb sensitivity training!

wireman wrote:

floats sticking,dont tell wired george i said this but try banging on bottem of carbs with a screwdriver or hammer handle.

You're supposed to use the handle end?
And I thought the hammered metal look was highly saught after, like a copper pot or fishing lure or something like that?

Tapping the bowl with something isn't as dumb an idea as it sounds... if the float hangs up within the bowl and then drops when you tap it, it tells you that you need to remove the bowl and see why it is hanging up. Generally a float is bent and hanging on the top of the bowl or on the edge of a gasket. BTW: They aren't my carbs so you can go over and help bang on the bowls for all I care bwhahaha

The wet one is the fuel line the other is a vacuum line from the carbs a nipple on one of the intake boots is the source of vacuum. Sounds like evaporated gas has plugged up float needle valves and causing hangup. Petcock in PRIME position will allow fuel to flow without engine running but the float valve should stop overflow if working properly. A rebuild or darn good cleaning should rectify problem.

hey rom,how ya feeling?welcome back to the nuthouse!