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Carb with pinched tube
- johnnymoff
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It looks like someone has tried to pull the part out with the pair of pliers, failed and then left it. It is pinched at the end and cracked along the sides. Only one of the 4 carbs has this issue.
These are 28mm mikuni with the accelerator pump but this is not the carb with the pump.
The bike is a KZ1000 B2 ('78)
Thanks
Engine: 77 KZ1000 A1
Frame: 78 KZ1000 B2
Carb Type: VM 26 with accelerator pump.
Needle clip: 3rd (middle) position
Pod air filters
Main Jet 132.5
Idle Jet 20
Clip position on needle 3rd (middle)
Exhaust 4 into 1 Vance and Hines
PO says 1170 kit installed.
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- floivanus
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my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew
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- jdvorchak
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floivanus wrote: That i believe is where the choke (enrichener circuit) pulls fuel from
I respectfully disagree. The enrichener pulls through a cast hole in the bowl through the brass jet at the very top of the pic with the O-Ring around it.
If I had to guess it's the pickup for the mixture screw but I don't know for sure. You might try to use some pliers gently to bend it back open then use an awl or pick even a large sewing needle to try to get it round again.
Hope someone with direct experience with those carbs chimes in.
Don't fix it until it's broken.
John
83 KZ550M1
83 KZ1100LTD
Also own:
2010 Harley Ultra Classic Limited, 2008 Harley low rider 71 CB350/sidecar
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- martin_csr
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jdvorchak wrote: I respectfully disagree. The enrichener pulls through a cast hole in the bowl through the brass jet at the very top of the pic with the O-Ring around it. ....
Nope. The brass fitting with the o-ring is a pump nozzle --- the other end of it projects into the carburetor bore.
floivanus is correct.
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- redhawk4
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I have the same carbs, but the tube in mine has the end closed apart from a very small opening in the middle. I believe it's done to restrict the amount of fuel that can be sucked up when using the enrichment circuit. Depending on how your cold starts are, it may not matter even if someone did crush it as long as fuel can get through. The opening is definitely not meant to be the full diameter of the tube.
1978 KZ1000A2 Wiseco 1075 kit
1977 KZ650B1
1973 Triumph Tiger TR7V
1968 BSA Victor Special 441
2015 Triumph Thunderbird LT
1980 Suzuki SP400
Old enough to know better, still too young to care
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- johnnymoff
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Yes, there is only one like that. Cold starts seem to be fine.
Engine: 77 KZ1000 A1
Frame: 78 KZ1000 B2
Carb Type: VM 26 with accelerator pump.
Needle clip: 3rd (middle) position
Pod air filters
Main Jet 132.5
Idle Jet 20
Clip position on needle 3rd (middle)
Exhaust 4 into 1 Vance and Hines
PO says 1170 kit installed.
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- redhawk4
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I'm guessing those tubes are probably pressed in with the casting hot, if you wanted to remove it you'd need to apply heat to get it out, unless someone knows differently. I have a set of parts carbs, if you really want/need to change that out I could see if I can get one out for you. On my 73 Triumph Tiger, the float height on the Amal carb is actually adjusted by moving the brass seat in the carb float bowl casting by warming it up and then moving it up or down to the required position. The float bowl material expands much more than the brass with only a little heat and it moves quite freely, but locks up when cold, so I'm envisaging something similar here.
1978 KZ1000A2 Wiseco 1075 kit
1977 KZ650B1
1973 Triumph Tiger TR7V
1968 BSA Victor Special 441
2015 Triumph Thunderbird LT
1980 Suzuki SP400
Old enough to know better, still too young to care
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- johnnymoff
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I have yet to start synchronizing the carbs so I don't know whether one is less efficient than the others. When I get to that point, I may need to replace the tube - thanks for the offer to help find one in your parts!!
I have never dealt with multiple carbs before. The only thing I have seen that may indicate an issue is that the left most (rider's left) exhaust header pipe is blue while the other 3 are gold in color from the heat.
Engine: 77 KZ1000 A1
Frame: 78 KZ1000 B2
Carb Type: VM 26 with accelerator pump.
Needle clip: 3rd (middle) position
Pod air filters
Main Jet 132.5
Idle Jet 20
Clip position on needle 3rd (middle)
Exhaust 4 into 1 Vance and Hines
PO says 1170 kit installed.
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- SWest
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- 10 22 2014
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Steve
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- redhawk4
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Perhaps someone will chime in who has changed that tube, or knows exactly how to do it, if it's really simple then it might be worth doing, I'll be happy to send a replacement to you.
1978 KZ1000A2 Wiseco 1075 kit
1977 KZ650B1
1973 Triumph Tiger TR7V
1968 BSA Victor Special 441
2015 Triumph Thunderbird LT
1980 Suzuki SP400
Old enough to know better, still too young to care
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- johnnymoff
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I will plan on going through carbs this weekend and check these things. I know the jets are all the same (132.5 main and 20 idle) The main jets are, big according to the previous owner, because the engine has an 1197 kit with 10 1/2 : 1 compression. It also has pod air filters and a 4 into 1 vance and hines.
Thanks to you too, Steve
Engine: 77 KZ1000 A1
Frame: 78 KZ1000 B2
Carb Type: VM 26 with accelerator pump.
Needle clip: 3rd (middle) position
Pod air filters
Main Jet 132.5
Idle Jet 20
Clip position on needle 3rd (middle)
Exhaust 4 into 1 Vance and Hines
PO says 1170 kit installed.
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- redhawk4
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To confirm the dimensions, length appears about 25 mm of the tube that is is exposed with about 3.5- 4 mm in the larger round recess in the carb body and about 3,5 mm holding it in the carb body - 32.5 mm overall length when removed. Outside diameter is 3 mm.
1978 KZ1000A2 Wiseco 1075 kit
1977 KZ650B1
1973 Triumph Tiger TR7V
1968 BSA Victor Special 441
2015 Triumph Thunderbird LT
1980 Suzuki SP400
Old enough to know better, still too young to care
Please Log in or Create an account to join the conversation.