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Mystery 34mm CV Carbs

blowerbike

blowerbike

Forum Sage
TGSR Superstar
Mystery 34mm mikuni CV Carbs...
anyone have an idea of what make/model/year these may have came on?
these are on a j model 1100 kaw right now but are not original to the bike.
the cover with the 3 screws kinda throws me???
bike is not in my possesion so not much more info is available.
thanks
 
Not sure what they go on, but I'm working on a guy's Yamaha Venture (those carbs set sideways) and those carbs have that on the side, it's enrichment valve, there is a small rubber diahpram and spring inside there. terrylee
 
Can you post up better picts?
I have some parts from a 79 cb650.
I thought they were Keihin though.
Carbs look similar though.
Will try and find.
 
I'm with Crankhtat,we need a better pic and from what I see in that one I'd guess Keihin to.
 
that's the only pic i have.
they are on a bike for sale and the guy said 34mm mikuni CV's.
i have not seen the bike in person and the owner said these was on the bike when he bought it.
these are a rack of 4 and spaced for large GS/KZ model's.
 
I have a set of KZ1000J carbs that look like that. I believe its an anti-backfire valve that keeps it from back firing with the lean EPA jetting. Not posative but thats what Ive read on the KZ forum. The 3 sets of Suzuki carbs I have arent like that
 
Katarat said:
I have a set of KZ1000J carbs that look like that. I believe its an anti-backfire valve that keeps it from back firing with the lean EPA jetting. Not posative but thats what Ive read on the KZ forum. The 3 sets of Suzuki carbs I have arent like that
Click to expand...

hmmmm
these are on a J model that has had the injection removed.
so maybe these are kawi carbs from a non injected model.
good info...thanks
p.s.
seller said they have a black choke knob where GS vacuums never had that option.
 
I think the name for the covered part is a cut off valve????

Rubber diaphram with a rounded ball on the end. Spring between the cover and the diaphram center.
 
Last edited:
Youre right, they are called air cutoff valves and they are anti-backfire valves that tie into the pilot circuit
 
more info...
supposed to be C H I P carbs.
in person they look like kawi J model carbs with the thick aluminum vacuum slide covers.
they say mikuni on them and have K&N 2-1/4" offset oval filters.
 
Except for the 3 bolt diaphargm deal mine look like ordinary BS34 Mikuni CVs & are off a KZ1000J
 
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