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29mm carbs

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hillbilly
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29mm carbs

#1 PostAuthor: hillbilly » Tue Jun 03, 2008 5:17 pm

i think i have got a set of early 29mm smoothbore carbs,can anyone verify this for me somehow,bin on z1 carb site,they dont have 17mm nut underneeth,but they do measure 29mm,if they are,has anyone got any floats for them. :shock:
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#2 PostAuthor: RALPHARAMA » Tue Jun 03, 2008 6:28 pm

You really need to post some pix! There's a how to at the top of the discussion board. Then we can see what you're talking about, I know it's hard to start with but trust me it makes life a shit load easier in the long run :D
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#3 PostAuthor: ollie » Tue Jun 03, 2008 7:44 pm

they could easily be from something else hillbilly ,need pics mate
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Re: 29mm carbs

#4 PostAuthor: PJones » Tue Jun 03, 2008 9:14 pm

hillbilly wrote:i think i have got a set of early 29mm smoothbore carbs,can anyone verify this for me somehow,bin on z1 carb site,they dont have 17mm nut underneeth,but they do measure 29mm,if they are,has anyone got any floats for them. :shock:


Pics would be good, also where are you taking the measurement on the carb?
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#5 PostAuthor: hillbilly » Tue Jun 03, 2008 9:43 pm

inside measurement on engine side ,it is 29mm.and the top cover has 2 screws to hold it on.
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#6 PostAuthor: neilbarrett » Thu Jun 05, 2008 10:20 pm

29mm smoothbores have a large hexagon drain plug on the bottom of the float bowls,
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#7 PostAuthor: neilbarrett » Thu Jun 05, 2008 10:23 pm

got chrome slides in em as well,tops have 3 screws
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#8 PostAuthor: gbh » Fri Jun 06, 2008 12:49 pm

29mm smoothbores have brass floats. They also have only one fuel inlet located between carbs #2 and #3.
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#9 PostAuthor: gbh » Fri Jun 06, 2008 12:51 pm

Here's an eBay auction link to some 29mm smoothbores. There are quite a few pics fro you to compare to your carbs.
http://cgi.ebay.com/ebaymotors/MIKUNI-2 ... enameZWDVW
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#10 PostAuthor: gbh » Fri Jun 06, 2008 12:55 pm

Garden variety carbs described as 29 smoothbores. CAVEAT EMPTOR :!:
http://cgi.ebay.com/ebaymotors/29-SMOOT ... enameZWD1V
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#11 PostAuthor: Iain marshall » Fri Jun 06, 2008 4:06 pm

Just a thought if you measure the older style 28s(z1 z1a z1b) at the engine side they measure nearly 29mm,just checked with my sets.Hope thats of some help
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#12 PostAuthor: Rich » Fri Jun 06, 2008 5:55 pm

Not all Mikuni sbores have a 17mm bottom plug, some of the early ones have a drain plug, I also have a set with plastic floats. What they do have is a slide that goes around the needle jet block giving a straight venturi and a combined needle jet and emulsion tube and there is only one casting for both left and right side carbs with redundant bosses left undrilled.
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