newb with carburetors = hey yall! Watch this.

[flybeau]

Hi y'all and thanks in advance for your input and help.  1st thing, about me, I'm the type that believes I can do anything.  All I lack is the information and maybe a little practice. lol  Usually I'm right but when I'm not... you just don't even want to know.

Next would be the set up.  I took the riders course then bought my 1st bike, an 83 magna (VF750C) honestly as a learners bike but have grown to really enjoy it.  It sat for years (don't know how many) and is old so I've  been joyously riding it and lovingly reconditioning it system by system as i worked the old age out of it.  A leak at the water pipes and a new rectifier.  Bled the mush out of the front breaks and OMG is that a rust hole in the frame?  ooo  Yep it is.  Just above the front knuckle of the sub-frame.  Seafoam fuel conditioner to clean up the fuel system.  While that sounded good at the time all the rust and crap flooded into the carbs and messed them up bad.  Since I had to remove the carbs to fix the frame it was a natural idea to clean them then.  In the cleaning process I had an unexpected move across state come up and carburetor body #4 was left in the cleaner for seven months.  Not good!  I have purchased a used set of carbs for the year and make with the idea that I can scavenge a working set out of the two sets. 

Now I'm at the point of assembly so I've taken a moment to step back and evaluate what I'm doing.  I've noticed some discrepancies and have been mulling over the ways I could be eff'in it up the past few days.  So now I have some questions and I figure if I don't ask I won't know and if I don't know I'll eff it up good.  LOL

The questions.

1> Is the carb body that sat in the cleaner for seven months still usable?  How to go about cleaning the little passages of the buildup of corrosion.
2> There is a model number difference on the carbs.  Original carbs are VD51C AUF.  The new set are VD51C AUG.  Are they compatible? 
3> It occurred to me that it may be better to just rebuild the new set as a whole instead of scavenging parts off of them.
4> I had a fourth question in this but have forgotten what it was so I will probably make another post when I remember  that one. lol

One pic shows both #4 bodies where you can see the discoloration and corrosion of the original.  The image of the float bowl shows what remained stuck to the carb.  You should have seen what came out of the jets when I removed them.  There is a fuel filter inline but maybe it's got a hole or something.  Or maybe this crap was already in the carbs before the cleaner was added to the gas.  The third pic shows organizing to reassemble.  And on that topic I know it is advisable and preferable to do one carb at a time.  I have taken meticulous notes and kept the parts organized as I did disassemble them one at a time.  I mention this only because I know some one will bring up that wise sage advice.  Now I wish I had heeded that advice but then I am a newb.  lol

Again thanks for your time and assistance.
Beauregard


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[John Luttrell]

I would personally just rebuild the new set and go with them or you can still rebuild the old set if you want to go that route, but I would not mix any of the parts between the sets. 

[flybeau]

Thanks for your input John.  That's what I was leaning towards, rebuilding the new set.  The only parts I needed was the carb body and a vacuum cylinder for the old set.  Which brings me to my next question about this project.

Carburetor # 4, coincidently enough, had holes in the vacuum cylinder and was stuck in the down position.  I had to use a wooden dowel to leverage the vac. cylinder to move.  When the bike was running the engine ran smooth at idle and had smooth power and acceleration.  What would be the ramifications of this problem in the engine/ the cylinder that carburetor fed?  At idle I presume it would function close to normal at idle but at higher RPM's that cylinder would be very lean with fuel from the idle ports only.  Would the restriction in the airflow cause other problems?

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[John Luttrell]

It was probably running on three cylinders above idle and like you said, four cylinders at idle.  More than likely no damage what so ever to the cylinder; press on with the carb rebuild and go from there.