What’s this spring lever under the carbs?

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19 Jul 2023 00:19 #887400 by treyhova
What’s this spring lever under the carbs? was created by treyhova
Anybody know what this is? And what it does? Spring lever upside down under the carbs. Pushes up but springs back down. 

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  • KZQ
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19 Jul 2023 06:16 #887402 by KZQ
Replied by KZQ on topic What’s this spring lever under the carbs?

Anybody know what this is? And what it does? Spring lever upside down under the carbs. Pushes up but springs back down. 

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Bill/KZQ
www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300

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19 Jul 2023 06:38 #887404 by Wookie58
Replied by Wookie58 on topic What’s this spring lever under the carbs?
Difficult without a picture but sounds like an accelerator pump ?
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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19 Jul 2023 09:55 #887407 by treyhova
Replied by treyhova on topic What’s this spring lever under the carbs?

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19 Jul 2023 10:56 #887410 by Wookie58
Replied by Wookie58 on topic What’s this spring lever under the carbs?
Looks like you are having issues attaching your pics, follow the below process
Click "attachments" - click "add file" - select your pic - wait for the green text to appear - click "insert all" then submit and you should be good to go

 
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca

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19 Jul 2023 11:23 #887412 by treyhova
Replied by treyhova on topic What’s this spring lever under the carbs?
Is it working?

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19 Jul 2023 11:28 #887413 by TexasKZ
Replied by TexasKZ on topic What’s this spring lever under the carbs?
Accelerator pump. Twisting the throttle should move the lever. To see if it is working, remove a filter and peek inside as you twist the throttle. You should see a small squirt of fuel.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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19 Jul 2023 14:22 - 20 Jul 2023 04:58 #887419 by martin_csr
Replied by martin_csr on topic What’s this spring lever under the carbs?
Just in case. You should see a small squirt of fuel... in each carburetor. see the manual for other details.
1981 KZ650 Competition Sports and Road
Last edit: 20 Jul 2023 04:58 by martin_csr.

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  • gd4now
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19 Jul 2023 22:16 - 20 Jul 2023 10:17 #887441 by gd4now
Replied by gd4now on topic What’s this spring lever under the carbs?
From the pic posted it appears that this set of carbs has both a pump and a sensor.  As I understand it one of the things the sensor does is only allow fuel out of the pump if the engine is running (providing vacuum) 

 
1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT
Last edit: 20 Jul 2023 10:17 by gd4now.
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20 Jul 2023 13:44 #887453 by treyhova
Replied by treyhova on topic What’s this spring lever under the carbs?
Thanks for all the great info fellas! I just picked up a 79 KZ650... B3 I think... it's black with the green and yellow striping. Pretty good condition overall but the engine is sounding a bit off, and I suspect it's running lean overall - so was wondering if that lever connected to the carbs had anything to do with it.

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21 Jul 2023 09:36 #887475 by gd4now
Replied by gd4now on topic What’s this spring lever under the carbs?
A 650 with accel pump with sensor, I had read/heard that some of them did have both but had not seen one or worked on one.  The pic you posted showed pod filters not air box, so I would think some jetting changes from stock would be required.  Any idea what jets are in it now?
1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT

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21 Jul 2023 09:58 #887476 by treyhova
Replied by treyhova on topic What’s this spring lever under the carbs?
No idea what jets are in currently. Any suggestions?

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