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slight stumble at take off could use some advise
- strum
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02 Feb 2016 17:25 - 02 Feb 2016 17:26 #709110
by strum
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
slight stumble at take off could use some advise was created by strum
I finally got my tank back and installed the pingle petcock today.
Heres where im at.
Lift the choke lever and touch the starter it cranks .
warms up fast with no popping or crackin like it had and im able to move the choke down fairly fast and
It idles smooth.1000-1100 rpms
runs down the hwy with no stumbles and pulls like it should
I did a hole shot and run through the first 3 gears at 9 grand had to get out of it ( was running out of road lol)
made me smile from ear to ear.
if im in town traffic or say slow down and make a turn im getting a slight stumble as i just crack the throttle.
im talking that first 1/8 of throttle turn then it clears and goes smooth .
I didnt pull a plug to see how they are burning yet but my friend who builds these pumpers a lot said i may need to either try turning my air screws in a 1/4 turn or maybe adjusting the pumper rod so it has less spray.
any thoughts are appreciated .
stan
Heres where im at.
Lift the choke lever and touch the starter it cranks .
warms up fast with no popping or crackin like it had and im able to move the choke down fairly fast and
It idles smooth.1000-1100 rpms
runs down the hwy with no stumbles and pulls like it should
I did a hole shot and run through the first 3 gears at 9 grand had to get out of it ( was running out of road lol)
made me smile from ear to ear.
if im in town traffic or say slow down and make a turn im getting a slight stumble as i just crack the throttle.
im talking that first 1/8 of throttle turn then it clears and goes smooth .
I didnt pull a plug to see how they are burning yet but my friend who builds these pumpers a lot said i may need to either try turning my air screws in a 1/4 turn or maybe adjusting the pumper rod so it has less spray.
any thoughts are appreciated .
stan
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
Last edit: 02 Feb 2016 17:26 by strum.
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- Patton
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02 Feb 2016 17:36 #709112
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic slight stumble at take off could use some advise
Possibilities could include issues with insufficient valve clearances and/or imperfect pilot circuits.
Are the carbs manual slide with side-located pilot air screws, similar to the following?
Good Fortune!
Are the carbs manual slide with side-located pilot air screws, similar to the following?
Good Fortune!
1973 Z1
KZ900 LTD
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- strum
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02 Feb 2016 17:50 #709114
by strum
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
Replied by strum on topic slight stumble at take off could use some advise
yes they have the air screws on the side much like your photo. They are the VM 28mm pumpers that came stock on the bike.
I just adjusted the valves so i feel thats ok.and the carbs have been apart and cleaned not only buy me but i took em to my friend because some of the pump parts were missing and he cleaned and checked all the circuits also.
I set all the screws at 1 1/4 initially and adjusted each after some riding by ear and watching the tach at low idle to get the best idle i could.
i checked them all a couple of time and they are all very close to 1 1/4 .
I just adjusted the valves so i feel thats ok.and the carbs have been apart and cleaned not only buy me but i took em to my friend because some of the pump parts were missing and he cleaned and checked all the circuits also.
I set all the screws at 1 1/4 initially and adjusted each after some riding by ear and watching the tach at low idle to get the best idle i could.
i checked them all a couple of time and they are all very close to 1 1/4 .
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
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- Patton
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02 Feb 2016 17:57 - 02 Feb 2016 17:59 #709116
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic slight stumble at take off could use some advise
Here's a method to clean the pilot circuit using pressurized carb cleaner spray.
Wear eye protection because the spray always backfires. Always.
If not already done, clear tube tests should be performed to assure that fuel levels are within specs.
Good Fortune!
Wear eye protection because the spray always backfires. Always.
If not already done, clear tube tests should be performed to assure that fuel levels are within specs.
Good Fortune!
1973 Z1
KZ900 LTD
Last edit: 02 Feb 2016 17:59 by Patton.
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- strum
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02 Feb 2016 18:08 #709119
by strum
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
Replied by strum on topic slight stumble at take off could use some advise
Did that and did the clear tube float settings
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
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- DGA
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02 Feb 2016 20:26 #709128
by DGA
"83 KZ1100 Spectre, '81 Yamaha XV750 Cafe, '74 Kawasaki H2B 750
Replied by DGA on topic slight stumble at take off could use some advise
Setting idle mixture screws for best idle often means they are slightly lean under load, try a 1/4 turn open more and see.
"83 KZ1100 Spectre, '81 Yamaha XV750 Cafe, '74 Kawasaki H2B 750
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- strum
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03 Feb 2016 13:51 #709245
by strum
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
Replied by strum on topic slight stumble at take off could use some advise
Figured it out . Im actually running the screws at 3/4 - 7/8 out instead of 1 1/4 . no stumble!!
And its smooth as silk in all ranges .
DGA you were right.
And its smooth as silk in all ranges .
DGA you were right.
Blairsville Ga.
1980 KZ1000 Shaft (sold and missed already)
2003 ZRX 1200R (sold)
2003 Concours ZG1000 (just purchased)
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