when it rains, it pours.

[DesignBuild]

-82 cb750F-


alright so i finally got my carbs to stop leaking out of the bowls, just in time for them to leak elsewhere.

i even bought the correct needles (with hooks) for the floats i just bought.


alright, the fuel linkage between carbs 3 & 4 is pretty much pouring gas out. just so happens when i bought my pilot jet o-rings i bought the o-rings for these too.

only, it seems complicated as hell to take all these carbs apart from eachother.

suggestions, tips?




if this doesn't do it, i'm afraid the ol' 750 will be going up for sell. these carb problems have really been breaking my spirit.

[Re-run]

Carb issue can break the back. When you get orings, make sure they are fuel resistant and metric. If you skip either of those, a leak has a good chance of happening.
I know when I clean my carbs, I remove those fuel lines and clean the openings on the carbs very will using q-tips to scrub off the dirt and crust.
If you have a little extra cash(I sure dont so I understand doing things as cheap as possible)maybe get a little sonic cleaner and put your carbs in their individually. Harbor freight has them for as low as $22
http://www.harborfreight.com/catalogsearch/result/?category=&q=sonic
I think I am going to get one sometime just to see how it works.

[DesignBuild]

thanks for the tips Re-Run. I do have the o-rings already, so i will probably try to make a well documented (for reassembly sake) this weekend.

Your bike may be different, but the only real part i am concerned about is filing down the choke valve screws  to remove them. What do you replace them with, nut and bolt?

[Re-run]

Well my carbs are different but if you can put in longer bolts with nuts without anything hitting or being impeded, then it should be fine.

[DesignBuild]

well some good news, i only needed to file down one screw the others had already been replaced (in 28yrs i imagine someone else went through this). i have successfully separated all four carbs, which was surprising easy to do. The only concern i have is the relief spring hook, i tooked pictures, but it was all of five minutes before i forgot exactly how it hooked in place, but i'll cross that bridge when i come to it.


Only thing is, as i removed the fuel linkage tubes and inspected the o-rings, they look just fine. No cracks, no breaks, very little visible wear at all. and Yet the one between 3 & 4 was obviously leaking. I noticed however that they were very easy to remove, with almost no effort i could pull them out of place, could this have attributed to the leak?

Given that i go ahead and replace the o-rings regardless of the current state they are in, is there anything else i can do to ensure the seal?

[Re-run]

If they came off that easy, I would suspect they hardened with age and that could certainly cause a leak.

[DesignBuild]

you are probably right, pliable would not have been a word i would use to describe them.

I am going ahead and ordering all new air cut-off valves while i have all four apart, but i will also go ahead and replace these o-rings.

Would it be advisable to look into some "gas resistant" type of sealant to back up the rings with? or should i stray away from trying to assist what is in place?

[Re-run]

As long as you get good o-rings that are fuel resistant, you should be just fine. I used o-rings for refrigeration.