carburetor leaking from fuel joint o-rings - Honda Motorcycles - FireBlades.org
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post #1 of 8 Old 11-11-2012, 6:22 PM Thread Starter
 
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carburetor leaking from fuel joint o-rings

I have been doing some work rebuilding my 96 900rr after somebody backed into her After pulling the gas tank and re-installing it, I have a fuel leak that looks like it is coming from the fuel joint o-rings between carb 1&2 and between 3&4. So my question is can the o-rings be replaced with out rebuilding the carbs? I have not had time to pull the carbs off the bike yet, but have spent a lot of time reading the service manual and reading posts on this and other forums on how to take care of this issue, sill coming up empty handed Bike runs really well, but leaks. I replaced the jets about 2 years ago with no issues, I have a small understanding of motorcycle carbs and would like to take care of this issue without having to take it to the honda dealership and need advice. What parts do i need besides the o-rings??
According to the parts list on this page

BEAVERTON MOTORCYCLES


I need to get the gaskets at #7 or get the joint and gaskets #4.

Any advice would be helpful.
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post #2 of 8 Old 11-11-2012, 9:23 PM
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Re: carburetor leaking from fuel joint o-rings

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Originally Posted by slims900rr View Post
I have been doing some work rebuilding my 96 900rr after somebody backed into her After pulling the gas tank and re-installing it, I have a fuel leak that looks like it is coming from the fuel joint o-rings between carb 1&2 and between 3&4. So my question is can the o-rings be replaced with out rebuilding the carbs? I have not had time to pull the carbs off the bike yet, but have spent a lot of time reading the service manual and reading posts on this and other forums on how to take care of this issue, sill coming up empty handed Bike runs really well, but leaks. I replaced the jets about 2 years ago with no issues, I have a small understanding of motorcycle carbs and would like to take care of this issue without having to take it to the honda dealership and need advice. What parts do i need besides the o-rings??
According to the parts list on this page

BEAVERTON MOTORCYCLES


I need to get the gaskets at #7 or get the joint and gaskets #4.

Any advice would be helpful.

You need to seperate the carbs to do them but it's not particularly difficult. Grease the o-rings during assembly.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #3 of 8 Old 01-05-2013, 12:01 AM Thread Starter
 
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Re: carburetor leaking from fuel joint o-rings

I had to take the carbs apart in order to replace the o-rings. Now i do believe i need to get the carbs synced. The headers are getting very hot (glowing hot) on cylinders 2, 3 & 4 but 1 was still cold. Is this usual for non synced carbs?
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post #4 of 8 Old 01-05-2013, 12:03 AM
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Re: carburetor leaking from fuel joint o-rings

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Originally Posted by slims900rr View Post
I had to take the carbs apart in order to replace the o-rings. Now i do believe i need to get the carbs synced. The headers are getting very hot (glowing hot) on cylinders 2, 3 & 4 but 1 was still cold. Is this usual for non synced carbs?

If you didn't mess with the synch screws they should be pretty close.
But synching is never a bad thing.
If the header is cold then clearly it is not firing.
Check the plug is clean and has spark.
Is there any vacuum feed to that cylinder?

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
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post #5 of 8 Old 01-05-2013, 12:33 AM Thread Starter
 
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Re: carburetor leaking from fuel joint o-rings

The sync screws had to be removed to replace the o-rings. I will have to pull the plugs tomorrow to see if it is fouled or smells like fuel. I do not know where i would find the vacuum to that cylinder.
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post #6 of 8 Old 01-05-2013, 12:41 AM
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Re: carburetor leaking from fuel joint o-rings

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Originally Posted by slims900rr View Post
The sync screws had to be removed to replace the o-rings. I will have to pull the plugs tomorrow to see if it is fouled or smells like fuel. I do not know where i would find the vacuum to that cylinder.

Okay, often you can simply seperate the carbs without touching the synch screws. You can do a rough synch using a small drill bit as a feeler gauge under the throttle plates.
Follow the vacuum lines from the vacuum chamber part#34 on the fiche you posted earlier.

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post #7 of 8 Old 01-05-2013, 1:30 AM Thread Starter
 
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Re: carburetor leaking from fuel joint o-rings

thank you bladeracer i'll be digging into it on sunday, fingers crossed its not something major.
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post #8 of 8 Old 01-07-2013, 10:30 AM Thread Starter
 
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Re: carburetor leaking from fuel joint o-rings

All cylinders are firing, syncing the carbs was the biggest problem I was having. The number 1 cylinder was not cold, just not red hot.
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