initial carb setup & plumbing

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23 Mar 2010 06:52 #355587 by ddcook07
initial carb setup & plumbing was created by ddcook07
I am rebuilding a 1978 KZ400 B-1 and I am ready to start it up for the first time after replacing a piston and ring set.
I installed a rebuild kit in each carb after a good cleaning. After filling the tank with fresh gas, I swiched on the pet cock and the right drain tube started draining raw gas! I am not getting any fuel to the combustion chaimbers as well!
Also, I am unclear as to how all of the tubing is to be routed.
Please help!!:S

Douglas D. Cook

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  • TeK9iNe
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23 Mar 2010 17:56 #355702 by TeK9iNe
Replied by TeK9iNe on topic initial carb setup & plumbing
These should help out:


Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
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23 Mar 2010 17:56 #355703 by TeK9iNe
Replied by TeK9iNe on topic initial carb setup & plumbing

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
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23 Mar 2010 17:57 - 23 Mar 2010 17:58 #355705 by TeK9iNe
Replied by TeK9iNe on topic initial carb setup & plumbing


Make sure part # 30 (drain screws) are closed completely.

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
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Last edit: 23 Mar 2010 17:58 by TeK9iNe.

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23 Mar 2010 17:57 #355706 by TeK9iNe
Replied by TeK9iNe on topic initial carb setup & plumbing

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
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23 Mar 2010 18:09 #355713 by ddcook07
Replied by ddcook07 on topic initial carb setup & plumbing
Thanks for the help!
I set up the carb plumbing as shown and the motor started.:laugh: I am getting the right cylinder firing and the left cylinder partially firing.:blink: I believe it needs finer tuning!!:S

Douglas D. Cook

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24 Mar 2010 04:35 - 24 Mar 2010 09:41 #355765 by TeK9iNe
Replied by TeK9iNe on topic initial carb setup & plumbing
You just need to vacuum balance the carbs, and make sure that the mixture/air screws are at equal default setting (like 1 1/2 turns out from lightly seated.) For now...
Then it will purrrr like tiger!

You can use ordinary vacuum gauges if you like, but they will require restrictors. Restrictors are plugs that have a 1mm hole drilled through them, and they go in the vacuum gauge lines you connect closest to the engine.
They are very east to make! Use wood, plastic, metal... whatever so long as its big enough to plug the vacuum line. Make them 5mm long, then drill a 1mm bit right through.

Restrictors keep the gauge needles from flailing due to strong pulses of vacuum at idle.

GL!

B)

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)
Last edit: 24 Mar 2010 09:41 by TeK9iNe.

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24 Mar 2010 09:21 #355822 by ddcook07
Replied by ddcook07 on topic initial carb setup & plumbing
Thanks for the help. :) I'll be fiddling with it this comming weekend.:blink:

Douglas D. Cook

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27 Mar 2010 15:42 #356570 by ddcook07
Replied by ddcook07 on topic initial carb setup & plumbing
I was able to fix the carb problem. It was a stuck float! Now both cylinders are firing nicely!:laugh:
I will be attempting to go through and adjust the tappets, set the timing, and sink the carbs tomorrow.:unsure:
I could use and welcome any suggestions, tricks, etc.:blink:

Douglas D. Cook

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