Rebuild vm29ss or rs34s?

[Macduff]

It looks like my slabby carbs are in need of serious tlc as the idle /cold start ccts don’t appear to work as intended , it’s a pig to cold start and hot starts are on a whim and prayer. Idle mixture settings are rich to ease cold starts. So should I attempt to locate another set of vm29ss given they will probably be the same if not already rebuilt or get a set of new RS34s? My thought are fully rebuilt vms are running close cost wise to new RS carbs though I do want to keep airbox stock. Any thoughts issues ? Ps does the central throttle cable pos on RS carbs cause issues on slabbies. Will rs34s fit slabbing intake boots and airbox trumpets ? I don’t think I need bigger than 34s as engine is stock and when it is running is fast enough for my aged brain having got it up to 10k going through gears. 

[Z32650S]

Wouldn't it be cheaper to get them ultrasonically cleaned and maybe rebuild them? Don't your vm29ss have a pull lever/knob to activate the choke/cold start circuit?

A spare set if carbs is never a bad thing but fixing what you have is also a reasonably sensible option as well. As for fitting the RS34, the carbs spacing is different (but could work if you intend on having them spaced for your application). I have a set of both the vm29ss and RS34 and the throttle bodies/spigots do not line up.

[Gixer1460]

3 hours ago, Z32650S said:

As for fitting the RS34, the carbs spacing is different (but could work if you intend on having them spaced for your application). I have a set of both the vm29ss and RS34 and the throttle bodies/spigots do not line up.

Hmmm! - maybe if you've got a set from a watercooled engine the spacing is wrong, but all the air and oil cooled Suzuki's and Kawa's of the period have the same inlet spacing 77 - 93 - 77. 'Onda's have an oddball spacing!

[Macduff]

To answer the Qs my choke knob seems to do nothing to help cold starts, the rs34s would be setup for my needs from supplier. I think my carbs need some new internals  at least needles an emulsion tubes as well as an ultrasonic clean .

[Z32650S]

9 hours ago, Gixer1460 said:

Hmmm! - maybe if you've got a set from a watercooled engine the spacing is wrong, but all the air and oil cooled Suzuki's and Kawa's of the period have the same inlet spacing 77 - 93 - 77. 'Onda's have an oddball spacing!

Hey Gixer1460, thanks for clarifying, I didn't mean to muddy the waters. Seems I may have another RS34 rack than the GS ones. For reference here is a mikuni document with all the carb spacing for their RS series from 34 - 40. RS Series Radial Flat Slide Carburetors

Edited January 12, 2018 by Z32650S
link fix