A short tutorial on replacing the keihin PWK emulsion tube
How to replace the emulsion tube
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billie_morini
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Re: How to replace the emulsion tube
Darryl, thank you! I'll likely press the tube into place. I'm not a fan of hammering on small aluminum parts, especially when they are not readily available. billie
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Chuck78
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Re: How to replace the emulsion tube
One comment, this is actually more properly called a needle jet. An emulsion tube serves a bit different purpose and is located in basically the same location of the carburetor, but the emulsion tube has a lot of small holes drilled around it in the middle section. The emulsion tube is also typically a combination part that includes the main jet receiving threads. Sometimes the emulsion tube is also the needle jet as well as the main jet holder.
'97 KDX220R - purple/green! - KLX forks, Lectron, FMF, Tubliss
'99 KDX220R project - '98/'01 RM125 suspension, Titanium hardware, Lectron Billetron Pro, Tubliss
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'99 KDX220R project - '98/'01 RM125 suspension, Titanium hardware, Lectron Billetron Pro, Tubliss
'77 Suzuki PE250 & '83 Suzuki PE175 Full Floater - restomod projects
'77 Suzuki GS750-844cc, '77 GS400/489cc & '77 GS550/740cc projects
'62 GMC 1000 Panel Truck
'88 Suzuki Samurai TDI/Toyota swaps
'88 Toyota 4x4 pickup
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kdxdazz
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Re: How to replace the emulsion tube
Chuck78 wrote: 07:50 pm Dec 26 2025 One comment, this is actually more properly called a needle jet. An emulsion tube serves a bit different purpose and is located in basically the same location of the carburetor, but the emulsion tube has a lot of small holes drilled around it in the middle section. The emulsion tube is also typically a combination part that includes the main jet receiving threads. Sometimes the emulsion tube is also the needle jet as well as the main jet holder.
Agreed but I've found needle jet and jet needle get confused and the average person seems to call them emulsion tube so I just went with that vocabulary
Keihin CV 26mm has the last that you stated,a combined emulsion tube and needle jet, the keihin PE from Japan has no emulsion tube but the PWK 28 and Thai made keihin pe28 have an emulsion tube and separate needle jet although they don't share the same emulsion tube
1999 KDX220SR (KDX220-B5)