- Posts: 2
- Thank you received: 0
Carb wear?
- hacer2
- Topic Author
- Offline
- User
Less
More
11 May 2015 14:11 #671573
by hacer2
Carb wear? was created by hacer2
Hey guys, ive been the proud owner of a 1980 kz440A for a year now. Since ive had it i have had issues with leaks. First time it was leaking from the two nozzles on the bottom of the carb. Had it rebuilt. Second time right after rebuilt it was leaking from only one nozzle. the shop i had it done it at ordered another carb kit and fixed it. The shop owner told me if it still leaked after that the carb is worn out and would need replacing... now a month later its leaking again. From the top of the carb.... I am wondering if the carb has suffered no visual damage. Can it wear out? The bike only has 16000kms.
Thank you
Thank you
Please Log in or Create an account to join the conversation.
- 650ed
- Offline
- User
Less
More
- Posts: 15344
- Thank you received: 2829
11 May 2015 15:18 #671582
by 650ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
Replied by 650ed on topic Carb wear?
Find a different shop - QUICKLY! There are only a couple reasons for a carb to leak, and they are very easy to fix. If the carbs leak after the shop worked on them the shop doesn't know what they are doing OR they just want to buy that new boat with your money.
Carbs don't "wear out." Float valves may get dirty, diaphragms may tear, etc., but the carb itself isn't going to "wear out", and surely no replaceable metal parts will be worn with a mere 16,000 kms. That is very low mileage.
The shop may have damaged your carbs or they may have screwed them up by replacing the original parts with cheap aftermarket junk that is not made with precision.
I recommend you simply buy a Kawasaki Service Manual and fix the thing yourself. Motorcycle carbs are not rocket science. You will save money and you will have a sense of satisfaction. Oh - and did I mention - find a different shop! Ed
Carbs don't "wear out." Float valves may get dirty, diaphragms may tear, etc., but the carb itself isn't going to "wear out", and surely no replaceable metal parts will be worn with a mere 16,000 kms. That is very low mileage.
The shop may have damaged your carbs or they may have screwed them up by replacing the original parts with cheap aftermarket junk that is not made with precision.
I recommend you simply buy a Kawasaki Service Manual and fix the thing yourself. Motorcycle carbs are not rocket science. You will save money and you will have a sense of satisfaction. Oh - and did I mention - find a different shop! Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
The following user(s) said Thank You: hacer2
Please Log in or Create an account to join the conversation.
- hacer2
- Topic Author
- Offline
- User
Less
More
- Posts: 2
- Thank you received: 0
11 May 2015 16:24 #671596
by hacer2
Replied by hacer2 on topic Carb wear?
I had that feeling. I am still new to mechanics and opening up carbs scare me. But i Fear i wont have much choice to start figuring it out. At least i have a shop manual and a Clymers. Thank you for confirming what i thought.
Please Log in or Create an account to join the conversation.
- Randombeat
- Offline
- User
- 0 to 100 real quick...
Less
More
- Posts: 274
- Thank you received: 23
11 May 2015 16:29 #671599
by Randombeat
1980 KZ750H LTD-- pods-- vance & hines 4-1 --speedo/tach/blinker/switch deletes -- brat style
Replied by Randombeat on topic Carb wear?
There are some great videos on YouTube on cleaning carbs, full walk throughs... 30-45 min videos, but well worth the time, free learning... Ya know?
And get a factory service manual.... Its a must, and will also walk nyounthrough step by step through removing and cleaning the carbs....
Between YouTube, the FSM, and this site, all the info is available....
And get a factory service manual.... Its a must, and will also walk nyounthrough step by step through removing and cleaning the carbs....
Between YouTube, the FSM, and this site, all the info is available....
1980 KZ750H LTD-- pods-- vance & hines 4-1 --speedo/tach/blinker/switch deletes -- brat style
Please Log in or Create an account to join the conversation.
- floivanus
- Offline
- User
Less
More
- Posts: 1055
- Thank you received: 116
11 May 2015 17:26 #671632
by floivanus
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew
Replied by floivanus on topic Carb wear?
I have never, never on any carburetor, motorcycle, car or what have you, bought a 'kit' (maybe a jet or two for tuning purposes, but I digress) the stock brass is most likely perfectly fine, you just tend to have to take out the diaghragm and the bowl off and clean, clean, clean, new (not always needed) float bowl gasket, put it back together and you're good to go
my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew
Please Log in or Create an account to join the conversation.
- SWest
- Offline
- Sustaining Member
- 10 22 2014
Less
More
- Posts: 23012
- Thank you received: 2756
11 May 2015 18:45 #671663
by SWest
Replied by SWest on topic Carb wear?
There is definitely satisfaction in knowing what's between your legs. Learn how to work on it and you won't need "oke-dokes" ever again.
Steve
Steve
Please Log in or Create an account to join the conversation.
- loudhvx
- Offline
- KZr Legend
Less
More
- Posts: 10868
- Thank you received: 1616
12 May 2015 07:34 #671744
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Replied by loudhvx on topic Carb wear?
Lately, due to alcohol in the fuel, brass parts have started to erode. On some carbs there is a brass tube overflow pipe inside the carb. If it starts to crack, that can cause a leak even if everything else is new.
Also, after many many miles some carbs do get problems related to wear. Some carbs use a butterfly valve as the throttle. This rotates on a shaft supported by the carb body. After a lot of use, the holes supporting the shaft can start to leak air and create a vacuum leak. I've also seen throttle slides that start to gall up and make the carbs stick.
So, while there are ways carbs can "wear out", hopefully your leaking issue is just from improper setup or from a part that can be replaced. If it from a cracked overflow pipe, a good repair is more difficult. You can sometimes put a sleeve over the pipe if the leak is not at the base. If the leak is at the base of the overflow pipe, then more drastic measures have to be taken.
Also, after many many miles some carbs do get problems related to wear. Some carbs use a butterfly valve as the throttle. This rotates on a shaft supported by the carb body. After a lot of use, the holes supporting the shaft can start to leak air and create a vacuum leak. I've also seen throttle slides that start to gall up and make the carbs stick.
So, while there are ways carbs can "wear out", hopefully your leaking issue is just from improper setup or from a part that can be replaced. If it from a cracked overflow pipe, a good repair is more difficult. You can sometimes put a sleeve over the pipe if the leak is not at the base. If the leak is at the base of the overflow pipe, then more drastic measures have to be taken.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Please Log in or Create an account to join the conversation.
- SWest
- Offline
- Sustaining Member
- 10 22 2014
Less
More
- Posts: 23012
- Thank you received: 2756
12 May 2015 08:01 #671748
by SWest
Replied by SWest on topic Carb wear?
It can be soldered in most cases. The main issue with CV carbs are the diaphragms. A lot of guys are too cheap to replace them. If they are old, they are getting hard and won't work like they should. If they are cracked, the same thing only worse. Gluing them is foolish and a waste of time. The diaphragms control the metering of the main jet and needle. Won't run for SHT without good ones.
Steve
Steve
Please Log in or Create an account to join the conversation.
- martin_csr
- Offline
- User
Less
More
- Posts: 8068
- Thank you received: 1656
12 May 2015 08:25 #671751
by martin_csr
Replied by martin_csr on topic Carb wear?
Where exactly at the top of the carbs is the leak?
If at the carb tops, try loosening then re-torquing the screws.
If the diaphragms are the problem, JBM Industries has replacements.
If at the carb tops, try loosening then re-torquing the screws.
If the diaphragms are the problem, JBM Industries has replacements.
Please Log in or Create an account to join the conversation.