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650 CV and 550 VM swap?

  • Thread starter Thread starter robtronic
  • Start date Start date
R

robtronic

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Are these a feasable swap? Ive got the gs650, a 1981, and the carbs are off a 550 is what the case said at the salvage yard. If someone could give me a yea or nea, I can go pick them up. Thanks.
 
Nea for sure. What's wrong with the 650 carbs?
 
Crap, that sucks, any specific reasons, which vms would work? Not that it's an urgent need, I'm just not a big fan of the cv carbs, something about the diaphram.... Saw these and they looked close enough for government work, so I wanted to check. Thanks for saving me 50 bucks.
 
Well, so far, running rich and I haven't nailed down why yet. One of my air screws is stripped so I have to drill it out or leave it where it is. No adjustment on the needle heighth. Just not a big fan, so far. I know a little more about dialing in VMs too, so I just wanted to give it a shot, if it was possible. They looked pretty fair shape too. Drat. Jets were at the setting but it's just super rich, fouling plugs. I haven't started the process to rejet it either, so I guess that's the obvious route.

Good news is they have 3-4 sets of CV's to get an air screw from.

Thanks all.
 
IIRC, the 80-82 4's all used BS32s, just with different jetting - and the choke linkage changed in 82. Perhaps someone slapped some carbs from a bigger motor on there? Could also be poorly drilled jets from a cheap rebuild kit or leaking o-rings. Have they been cleaned the GSR way? Are all of the cylinders running way rich?
 
Yes rich on all four,

Yea= yes
Nea= nope
Nope=no

e.g. Naysayers
 
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