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1979 KZ 650 B3 what are the carbs

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20 Oct 2024 16:08 #905270 by Vietvet
1979 KZ 650 B3 what are the carbs was created by Vietvet
I just stripped down the carb assembly ready for vapour blasting and I found that in one of the float bowls there was a ball and weight came out. I checked the other 3 and they were secured by a very tiny spring. I don't know what it is called or what it is for. Looking at parts diagrams it does not even come up as a part. These items are not in any parts list I have found. Any ideas appreciated, TIA

Tantanoola South Australia.
1979 KZ 650

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20 Oct 2024 17:14 #905272 by Nessism
Replied by Nessism on topic 1979 KZ 650 B3 what are the carbs
That ball, weight, and c clip are for the accelerator pump feed.  Each float bowl should have these parts or the accelerator pump won't work.

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20 Oct 2024 17:54 - 20 Oct 2024 17:57 #905273 by Injected
Replied by Injected on topic 1979 KZ 650 B3 what are the carbs

I just stripped down the carb assembly ready for vapour blasting and I found that in one of the float bowls there was a ball and weight came out. I checked the other 3 and they were secured by a very tiny spring. I don't know what it is called or what it is for. Looking at parts diagrams it does not even come up as a part. These items are not in any parts list I have found. Any ideas appreciated, TIA

 
 

 

 

Took about 2 minutes to locate... but it looks like only the O ring is still available to order, so don't loose those parts!
Last edit: 20 Oct 2024 17:57 by Injected. Reason: info

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21 Oct 2024 01:45 #905279 by Vietvet
Replied by Vietvet on topic 1979 KZ 650 B3 what are the carbs
Is it possible to bypass the pump, disconnect the rod and just adjust the jets to make up for not having the pump. I don't like accelerateor pumps. Back in 1974 I had a Ducati 750 GT which h had Dellorto cards with them, my mates used to twist the throttle to pump them while I was else where and then stand back and laugh as I had to kick start a flooded engine.

Tantanoola South Australia.
1979 KZ 650

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21 Oct 2024 06:23 #905283 by Nessism
Replied by Nessism on topic 1979 KZ 650 B3 what are the carbs
Do your carbs have one diaphragm on the float bowl, or two?  The carbs with two are more problematic than those with just one.  If you have the single diaphragm type carbs, you may want to just keep it.  

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21 Oct 2024 12:33 #905294 by Vietvet
Replied by Vietvet on topic 1979 KZ 650 B3 what are the carbs
There are two at the base of number two carb. I will order a repair kit for it and hope that the little spring clips are included. Long term I might look around for a second hand set of carbs off a Z650 which the rest of the World got and didn't have all this junk just to satisfy the Californian system.

Tantanoola South Australia.
1979 KZ 650

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21 Oct 2024 12:40 #905295 by Wookie58
Replied by Wookie58 on topic 1979 KZ 650 B3 what are the carbs

There are two at the base of number two carb. I will order a repair kit for it and hope that the little spring clips are included. Long term I might look around for a second hand set of carbs off a Z650 which the rest of the World got and didn't have all this junk just to satisfy the Californian system.
Correctly functioning "accelerator pumps" are a good thing, they eliminate "hesitation" when snapping the throttle open
The following user(s) said Thank You: Vietvet

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21 Oct 2024 14:28 #905302 by zed1015
Replied by zed1015 on topic 1979 KZ 650 B3 what are the carbs

 Long term I might look around for a second hand set of carbs off a Z650 which the rest of the World got and didn't have all this junk just to satisfy the Californian system.
You can either disable the pumper mechanism or simply remove the pumper rod and replace the pumper float bowls with those from a set of non pumper VM's.
The non pumper bowls don't have the drilling for the check valve and also block off the passage to pumper nozzle.

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22 Oct 2024 07:49 - 22 Oct 2024 10:34 #905330 by H1Vindicator
Replied by H1Vindicator on topic 1979 KZ 650 B3 what are the carbs
The K&L kit includes the spring. replacing the bowls and trying to bypass it isn't worth the trouble. test the pump by rigging a fuel supply, then vigorously actuate the throttle pulley. fuel should squirt out each nozzle w/o hitting the carb bore walls. after installing the parts, if the carbs are gummed up, the problem isn't the pump, it's clogged orifices.
Last edit: 22 Oct 2024 10:34 by H1Vindicator.

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