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Sudden loss of power
- XL777
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04 Dec 2011 21:11 #491557
by XL777
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
Sudden loss of power was created by XL777
After 6mo of being pissed off and busy I'm back on the kz project. This spring I spent a lot of doh trying to get the beast working with limited luck.
After one 250km ride I started having sudden loss of power issues similar to a fried Dyna coil. After about 10 min of riding the bike would bog down and stall. After about 5-10 min of sitting it would fire up fine and then I'd ride home but it seemed like the power was weak a bit. My thought are electrical or fuel. I have replaced the entire electrical system other the wire harness . I did install a new single feed peacock and added a t joint to feed both carbs
It is winter here in Canada so now is the time to tinker
After one 250km ride I started having sudden loss of power issues similar to a fried Dyna coil. After about 10 min of riding the bike would bog down and stall. After about 5-10 min of sitting it would fire up fine and then I'd ride home but it seemed like the power was weak a bit. My thought are electrical or fuel. I have replaced the entire electrical system other the wire harness . I did install a new single feed peacock and added a t joint to feed both carbs
It is winter here in Canada so now is the time to tinker
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
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- 650ed
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04 Dec 2011 22:15 #491567
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Sudden loss of power
Make sure the fuel line does not have any kinks in it. Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- MFolks
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04 Dec 2011 22:34 #491571
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic Sudden loss of power
Check the vent in the gas tank cap, as they have been known to get clogged.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- Patton
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- KZr Legend
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05 Dec 2011 00:33 #491588
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Sudden loss of power
Would also flush the fuel tank (remove tank; add some fresh gasoline; shake it around; and fast dump through filler hole).
And remove the petcock from the fuel tank, and clean the petcock screens that fit up inside the tank.
Also clean the petcock sediment bowl, and filter screen.
Good Fortune!
And remove the petcock from the fuel tank, and clean the petcock screens that fit up inside the tank.
Also clean the petcock sediment bowl, and filter screen.
Good Fortune!
1973 Z1
KZ900 LTD
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- Old Man Rock
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05 Dec 2011 07:52 - 05 Dec 2011 08:41 #491617
by Old Man Rock
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Replied by Old Man Rock on topic Sudden loss of power
Tank -> Clear tube in-line fuel filter -> carbies... Gas flowing?
"I did install a new single feed peacock and added a t joint to feed both carbs"..
Pingel or cheap knock off such as Bikers choice petcock?
Did this same issue occur with original petcock?
"I have replaced the entire electrical system other the wire harness" Stock ignition components (points/condenser) or Dyna series/other E.I?
NOTE: I realize you mentioned Dyna coils but not the ignition pickups so just asking...
If Dyna ignition, good engine case ground?
Ideal +12Vdc (battery) to ignition plate?
Ideal pickup leads to coil terminations?
Coil leads not shorting to frame (ground)?
Just some thoughts....
OMR
"I did install a new single feed peacock and added a t joint to feed both carbs"..
Pingel or cheap knock off such as Bikers choice petcock?
Did this same issue occur with original petcock?
"I have replaced the entire electrical system other the wire harness" Stock ignition components (points/condenser) or Dyna series/other E.I?
NOTE: I realize you mentioned Dyna coils but not the ignition pickups so just asking...
If Dyna ignition, good engine case ground?
Ideal +12Vdc (battery) to ignition plate?
Ideal pickup leads to coil terminations?
Coil leads not shorting to frame (ground)?
Just some thoughts....
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
Last edit: 05 Dec 2011 08:41 by Old Man Rock.
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- bountyhunter
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05 Dec 2011 16:39 #491707
by bountyhunter
1979 KZ-750 Twin
Replied by bountyhunter on topic Sudden loss of power
Sounds like crud hitting a main jet.
1979 KZ-750 Twin
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- XL777
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24 Mar 2012 19:53 #511726
by XL777
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
Replied by XL777 on topic Sudden loss of power
So it is finally warm enough to work in my crummy shed and I'm back looking for the issue. Good news I can replicate the issue in the shed.
after about 10-15mins bike starts to die if you apply throttle it stalls, I tried putting on the choke progressively to see if I could keep it idling but it eventually stalls with full choke.
"Tank -> Clear tube in-line fuel filter -> carbies... Gas flowing?"
I did fix a kink in my fuel line. My petcock is new from z1 and I didn't have any issues with the old one, the seals are toast on it so can't try it.
"
NOTE: I realize you mentioned Dyna coils but not the ignition pickups so just asking...
I have dyna coils and ignition.
one thing that was added was an acewell tack/speedo that wraps around the ignition coil to read the RPM.
after about 10-15mins bike starts to die if you apply throttle it stalls, I tried putting on the choke progressively to see if I could keep it idling but it eventually stalls with full choke.
"Tank -> Clear tube in-line fuel filter -> carbies... Gas flowing?"
I did fix a kink in my fuel line. My petcock is new from z1 and I didn't have any issues with the old one, the seals are toast on it so can't try it.
"
NOTE: I realize you mentioned Dyna coils but not the ignition pickups so just asking...
I have dyna coils and ignition.
one thing that was added was an acewell tack/speedo that wraps around the ignition coil to read the RPM.
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
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- XL777
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24 Mar 2012 19:55 #511727
by XL777
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
Replied by XL777 on topic Sudden loss of power
oh I tried popping the fuel cap no changes
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
Please Log in or Create an account to join the conversation.
- gd4now
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- Denco where did you go?
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24 Mar 2012 21:23 #511746
by gd4now
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
Replied by gd4now on topic Sudden loss of power
It does not sound like a fuel issue to me. More like a heat induced electrical issue esp if you let it cool off it will run again. Check the coils, maybe remove the tac and see if the issue goes away.
Which dyna system and coils are you running? The S or the III?
Which dyna system and coils are you running? The S or the III?
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
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- XL777
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24 Mar 2012 21:46 #511748
by XL777
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
Replied by XL777 on topic Sudden loss of power
Yes when it cools it will start and run again for about 10 mins but sluggish.
I have Dyna S
I'm slowly going through all the wires and coils to see it that may be the issue.
I am suspicious of the acewell tach cord and thinking about it now it started after I added it. Is it possible that the wire could oveloading the coil?
I have Dyna S
I'm slowly going through all the wires and coils to see it that may be the issue.
I am suspicious of the acewell tach cord and thinking about it now it started after I added it. Is it possible that the wire could oveloading the coil?
2012 Triumph Bonneville SE black
1978 KZ1000 B2 LTD
Fresh top end rebuild
Rebuilt head
Wiseco 1015 pistons
Dyna s
Green Dyna coils
Wired george mod
It is easier to say what I haven't replaced then what I have.
I must love this cruel mistress since she hates me
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- gd4now
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- Denco where did you go?
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24 Mar 2012 23:43 - 24 Mar 2012 23:44 #511767
by gd4now
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
Replied by gd4now on topic Sudden loss of power
I do not know if the tach wire could create an issue or not. But one way to check is to remove it and see if it makes a difference. I am not familiar with how it works or how it wraps around the coil, but maybe the coil can not cool off as well with it wrapped on it. But I do think that coils that are beginning to have issues tend to show them more when hot than when cool.
1977 KZ650 B1
Pods and Denco header
OLD KAW OWNERS SMILE ALOT
Last edit: 24 Mar 2012 23:44 by gd4now.
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- Patton
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24 Mar 2012 23:49 #511771
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Sudden loss of power
If not already done, would assure valve clearances are within specs.
Good Fortune!
Good Fortune!
1973 Z1
KZ900 LTD
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