Carbs for GS1000S, 1979 or 1980 CV

[Anonymous]

Problem: My 1979 GS1000SN carbs are beyond help. Will the 1980 CV carbs from the later 8-valve 1000 interchange without modifying the head? My factory manual does not go beyond 1979 so I have no data on the later models, but I do have a set of CV carbs from a 16-valve GSX which are obviously much larger. I can obtain a good set of the later GS1000 carbs on ebay if they are compatible with the small, 1979 joints. I fear that the CVs may be larger and require rubber joints which use hose clamps at both ends-like the GSX carbs that I have. My joints (connectors) attach to the intake ports with screws. Machining the head and/or enlarging the ports is not an option. Thanks, Buzz

[KEITH KRAUSE]

The CV carbs will not bolt up to the '79 head. Why are your VM carbs beyond help???

[Anonymous]

Don't think they will work, different size & type mounting. If you could find a head from a GS 1000, that came with CV's, that mav be an option. Look close at your carbs, there's not much in there to ware out, very few moving parts, just very small ports & passages that must be completely clean. Also, I think the pet cock was in a slightly different location on the GS 1000 tanks that came with CV carbs ie. an "80" GS 1000 S or GS 1000 E.

[focus frenzy]

the 80 up 1000 with CV's uses the same mounting as the pre-80, I am not sure if the screw hols in the rubber manifolds is spaced the same.
I do know that the intake ports are alot bigger so that would be a problem as suddenly going from a big hole to a small hole with a sharp edge will cause strange air flow problems.

[Anonymous]

forget it Buzz, Keith is right!, cv and vm are totally different spacings. you can get a refurb kit for your vm's and with the carb rebuild guide on this site,job sorted. Dave.