PZ30 carburator adaptor manafold for Ural and Dnepr

[Scott E]

I've been watching Russian and Ukrainian Ural and Dnepr videos on Youtube and have seen a new product from AliExpress that adapt PZ30 carburetors to Ural and Dnepr heads. The manifolds bolt to the heads just like K65 and K68 carburetors and rise to a flange for the PZ30 carburetors so everything is just bolt on and go. They also raise the height of the carburetors to provide more clearance between the carburetor and the shifter on the left side and brake pedal on the right. One Russian Youtube'r even opened a box with a kit with the PZ30 carbs, gaskets, and cables in a kit. I have searched AliExpress and can't find the manifolds or the kit with everything. The PZ30 Carbs without anything else are easily found on AliExpress. I put a comment asking for the link for those items and have got no responses.  I don't speak Russian so I don't understand what they are saying but I know exactly what they are showing. I'm wondering if they are showing products sent to those Youtuber's to gauge response before starting mass production of those adaptor manifolds and kits? If anyone has the links to those products I would much appreciate them.

[dmb]

I have a set of those carbs.. they are pretty cheep so cheep that the 4 screws to hold the float bowl on only two are used the other two just have nothing but they do have a cap on the bowl for jet changes. finally got the k68's the work so i'll give them one more chance.

[racepres]

I will continue to use the Keihin's on the '07 Ural...and will only change out the Dnepr Carbs,(K63's) If/When I locate another set of CV Carbs suitable for the Dnepr..

IMO, CV Carbs are as close to Fuel Injection as one will attain...Yet, Much more adjustable, by Layman!!

[luca.stere]

On 10/3/2020 at 6:34 PM, Scott E said:

Russian Youtube'r even opened a box with a kit with the PZ30 carbs, gaskets, and cables in a kit.

Probably the kit (cables, gasket, etc) is made in Russia and that is why you find only the carbs on AliExpress.

[Scott E]

17 hours ago, luca.stere said:

Probably the kit (cables, gasket, etc) is made in Russia and that is why you find only the carbs on AliExpress.

The box he opened up with the PZ30 carburetors, throttle cables, gaskets, and manifolds had Aliexpress tape sealing the box and the box had Aliexpress printing on it. I still can't find it on Aliexpress myself. Perhaps it is only available from the Russian language Aliexpress site? The Russians and Ukrainians really like those PZ30 carbs on their Ural and Dnepr Motorcycles. I use google translate to translate the comments from Russian to English. I asked in the comments section for a link but still no responses. Some commented about how cheap they are but still perform very well on Ural and Dnepr motorcycles.

[Serious Black]

I got sent these instead of the VM28 Mikunis I ordered. No impressed and gave them away without trying them. The TM28s I just bought, well, another story entirely 🙂

 

[dmb]

I broke the cap that holds the needle on my POS K 68's. I got them to run OK but would run weird at 1/8 throttle the needle was moving up and down like it was loose so i pulled the cap that holds the needle, un screwed it to find boogered threads moved the clip up 1 notch added a small washer to stop the movement then i tried to screw the cap back on, no dice cheap pot metal just broke up. that carb IMHO is poorly made. now am I going to get the same deal on a K65? or should I hunt down a set of CV's for my dnepr 16. they just look wrong to me. thanks in advance and Merry Christmas to all. Dennis Bell

[RussN]

dmb:

Do you want a bike that runs well, or looks "original?"

Personally I like a running bike. The Ride is always the best part.

RussN

[dmb]

Yes, I've worked on bikes since 1971 and i know that CV's are the way to go. what CV after market works? I thought that K68 was a Jap copy but what a joke. Plenty of flat and round slides work fine. and no i'm not going to spend $300+ on a set of carbs on a Dnepr when something cheaper will work. 

[Scott E]

8 hours ago, dmb said:

Yes, I've worked on bikes since 1971 and i know that CV's are the way to go. what CV after market works? I thought that K68 was a Jap copy but what a joke. Plenty of flat and round slides work fine. and no i'm not going to spend $300+ on a set of carbs on a Dnepr when something cheaper will work. 

Did you have the Chinese copy K68's or real Pekar Russian Made K68's? There is a huge difference between them. The Chinese K68's are total crap. Also the Pekar K68 rebuild kits do not fit the Chinese K68's at all. The Chinese don't make rebuild kits for their copy's. They expect you to buy new K68 Carburetors if you are foolish enough to do that. That said the Russians and Ukrainians love those PZ30 Chinese made Carburetors but hate the Chinese made K65 and K68 Carburetors.

[Vance Blosser]

Terry Crawford had located an alternative source for the Keihin CV carbs at a lower price. You might want to check with him.

[dmb]

I think i bought the Chinese ones, plastic caps, i took them apart and the float bowl gasket shrunk so i super glued them on so i could stretch and glue every corner for them to fit. i payed $60 or so. I bought this from a guy who ran into a tree and broke the right cylinder off the engine [yeah in between the side car and the bike] so i took the motor apart [after i sawzawed the bent rod of of it] and replaced everything that looked bad new pistons rings bored .008 [bmw side car spec's] bearings, seals, runs good for what it. is Just trying to get it right. I have a friend who has a bunch of the 28&30 chinese carbs so i think i'll give them a try. so Pekar is the way to go for CCCP carbs? thanks Dennis

 

[Scott E]

Pekar is the way to go if you want to keep it all Russian. CV carbs are the best but cost is high for them. You also must replace the rubber parts in them every so often depending on the fuel available. If you have government mandated ethanol contaminated gasoline like we have here in the USA due to Farm Lobby money and corrupt politicians you'll be rebuilding them every 2 or 3 years. The PZ30 carburetors don't have any rubber in them and will go forever as long as you don't let the fuel rot in them.

[dmb]

I have a set of PZ30's although i don't like the 2 screws and 2 blank pads on the float bowl i do like the big main jet plug on the bottom if not just to drain the bowl of the CARB gas we have here. the guy said he had them on a 650 bonnie so I'll look at whats in their.He might have lied and the are 125cc carbs. Any idea what jetting to start with? I have a bunch of jet drills from long ago but i don't know about what pilot jets to start with maybe the K68's will fit. I'm open to any help from all my friends here being we are all stupid enough to buy and work on these things but i love a challenge and i was sick of working on harleys and UJM's still like air cooled 2 stroke's though.

[propwash]

K65Ts are much better than the K68s.  All metal and original carbs for the Dnepr 650.  I have been running them for over 17 years.  There is a tech article about them on the site.

Two things -

1) You have to be mindful of ethanol with the original float needle valves as they have a small washer for sealing.  Ethanol will eventually dissolve these and the bowls will overflow.  Run non ethanol fuel or swap out the needle valves.

2) The main jet post will loosed.  There is a "D" washer that is suppose to prevent loosening, but the post will loosen anyway.  Loctite the post and then you can forget it.  I believe this is covered in the tech article.

I have not had reason to pursue different carbs.  If was to spend a bunch of time to go CV, I would weld up some adapters and go all in with Bings off a BMW 650 or something and not waste time on the Chinese carbs.