75 kz 400 stalls when given gas
- csarnese
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75 kz 400 stalls when given gas
08 Jan 2015 18:44
Today i got a brand new lithium battery for my bike it was fully charged. I hooked it up to my bike and started it up with the choke open to warm it up because it was 25° here in south jersey. When i closed the choke it idled really low, then i gave it a little gas and it stalled out. Did the same process and gave it gas with the choke open and it was fine. Closed it and gave gas and it shut off again. Did it so much i drained the battery, now its charging. Now a quick backstory.. Carbs were just cleaned, tank was recently taken off cause i had to weld and a lot of gas was lost. Last time i ran the bike about a week or so ago and i had just washed it and after it was running choppy, i figured i got water in the air filters and it needed to dry. So today should i have let it warm up a bit more? Could it need more gas or could the water have done anything to mess it up? It was running great before i washed it. any help would be much obliged. Thanks 
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- Patton
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Re: 75 kz 400 stalls when given gas
08 Jan 2015 20:54csarnese wrote: Today i got a brand new lithium battery for my bike it was fully charged. I hooked it up to my bike and started it up with the choke open to warm it up because it was 25° here in south jersey. When i closed the choke it idled really low, then i gave it a little gas and it stalled out. Did the same process and gave it gas with the choke open and it was fine. Closed it and gave gas and it shut off again. Did it so much i drained the battery, now its charging. Now a quick backstory.. Carbs were just cleaned, tank was recently taken off cause i had to weld and a lot of gas was lost. Last time i ran the bike about a week or so ago and i had just washed it and after it was running choppy, i figured i got water in the air filters and it needed to dry. So today should i have let it warm up a bit more? Could it need more gas or could the water have done anything to mess it up? It was running great before i washed it. any help would be much obliged. Thanks
Am uncertain about meaning of choke being "open" or "closed," and wondering which means choke's ON or choke's OFF.
Cold engine is usually started with choke-ON, and allowed to warm up while gradually reducing or turning the choke-OFF (normal running position).
Same terminology is generally used for "true choke" (restrict incoming air) and for "enrichment circuit" (adds more fuel without restriction on incoming air).
Water is heavier than gasoline and settles to bottom of tank.
To remove water from the fuel system --
Could drain some fluid from the tank, through the petcock and on through the disconnected fuel line into a waste bucket for disposal.
Also empty the petcock sediment bowl (if so equipped).
Drain the carb bowls.
Add some water remover (alcohol based fuel conditioner) to the fuel inside the fuel tank.
Good Fortune!
1973 Z1
KZ900 LTD
KZ900 LTD
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- Patton
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Re: 75 kz 400 stalls when given gas
08 Jan 2015 21:05csarnese wrote: . . . Last time i ran the bike about a week or so ago and i had just washed it and after it was running choppy, i figured i got water in the air filters and it needed to dry. So today should i have let it warm up a bit more? Could it need more gas or could the water have done anything to mess it up? It was running great before i washed it . . . .
Yes, air filters should be water-free.
Besides possible water-contaminated fuel, running choppy might result from water getting on old cracked ignition coil(s) and/or deteriorated spark plug wires, and causing partial ignition failure and weakened spark .
Once dried out, the ignition system may return to satisfactory performance -- until it gets wet again.
A good ignition system should perform okay even while being doused with water, and should not falter while riding through a rain storm.
Good Fortune!
1973 Z1
KZ900 LTD
KZ900 LTD
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