Welcome to the JBM Industries Home Page
SITE MAP:     click on the tabs above, or click on picture of the item to see more.
Rotax Stainless Steel Exhaust Spring
Bing carburetor primer port plug
Rubber ignition wire boots
Fuel Tank push grommets
Carburetor Socket for Rotax
447, 503 using Bing model
54 or Mikuni H4 carb.
Rotax 582 Carburetor
socket boot.
Rotax flange type carburetor
socket for 912 engines using
Bing model 64.
Also fits HKS engines
Rotax 582 cylinder head
rubber gasket O-ring set.
Long Lasting rubber throttle
cable adjuster covers fit Bing
and Mikuni carburetors.
Replacement diaphragms for
Yamaha SX TX650 Mikuni
BS-38,  BS-34, & BS-34SS CV
carburetors last longer and are
easy to install.
Air Intake Silencer boots for
dual carburetor equipped
Rotax engines.
Yamaha 650 twin Carburetor
holder rubber intake manifold
isolates heat and vibration.
The one shown above fits
Mikuni BS-38 CV carburetors.
This straight Flange type used
on early 1970 thru 1973
Rotax gaskets for 2 stroke
engines & Bing 54 carburetor
Not sure if these fit GL1200
Honda Goldwing GL1000,
GL1100,  manifold intake
carburetor holders
Made from TSR
compound, these
carburetor manifold
socket holder boots will
outlast original equipment.
Updated 10/26/2022
Shows KZ440 carburetor slide installed.
Fits Kawasaki 440 twins and some 750 four cylinder models.
Diaphragms for Keihin CV Carburetors used
on Kawasaki 400 and 440 twins, KZ750/4
and many other
motorcycles. 71 mm outer
groove diameter.
Click picture for more information.
Click for information on custom
molded Honda GL1100, 1000
Goldwing carburetor
socket boots.
We also have the diaphragms for Mikuni 28mm carbs used on some bikes.
Hitachi Carburetor replacement
These diaphragms fit Yamaha
Maxim XJ650G and Seca
carburetor slide.
Fits Honda Hurricane CBR 1000 made from 1987 to 1996.
Also fits Honda  VT700 & VT800 fitted with plastic slides.
K-72 fits Honda GL1500 / 6 cylinder

Order K-72-S for Honda V4 1100 or Shadow VT1100 models with
metal slides. Also VTR250, VFR400R, NC-30, with plastic slides.
See the JBM ABOUT US PAGE click here
TK carburetor replacement diaphragms are easy to install.
TEIKEI or TK Carburetor
Diaphragm Yamaha XT350
Hello Don,

I am really satisfied with your product.The price/quality relation is perfect.  If threre is
anything what I can do for you here in Germany,  don't hesitate to contact me.  Have
a great day.
Wolf from the sunny Berlin......  :o)
Instruction for installing this Sheng Wey
Carburetor diaphragm for Johnny Pag
Motorcycle shows in detail how the
diaphragm works.
See the "How to Order" page click here.
Hi Don,
Thank you for your speedy reply. Payment sent via PayPal.
PS. I just returned from a 1,000 mile round trip after installing the new BS34
diaphragm set I borrowed from a good friend, and they performed excellently.  I was
very pleased.

Ben Bennink
Just a quick note to say diaphrams arrived promptly and by following your website
installation instructions fitted perfectly in a matter of minutes. Not yet fired the bike up
yet as there are other things on list to do but I am sure it will run sweet as a nut!!.
Again, your website is fab and while Kawasaki continue to charge £140 for each
diaphragm (attached of course to a new slide which you don't really need), I can
imagine you must be very busy.
Keep up the good work.    Regards,  Nick.
Hi Don.
I am sorry it took so long but I wanted to let you know that the
diaphragms worked perfect for my bike and I have recommended you to
a lot of people. Thanks again!!!!!!!
Click here to see ALL
we manufacture.
Click here to see more about Jabiru Carburetor sockets we manufacture.
Jabiru carburetor sockets
I received my diaphragm for my Keihin CV 32 carb for my KZ750/4 quickly and installed it with no problems. Following your instuctions on your website made it a
piece of cake. It fit so perfect I can't believe guys are even considering the need for any type of glue. The bike runs the best it has run in years. Thanks for the
great product and great service. Dave
Carb rubbers , wow , I must admit they are the best quality , I have a set
on my plane which have done 4 years service and have never been
touched ,
The plug caps and the throttle cable adjuster are just as good excellent
quality , thanks for a great product  , Regards Alex Rudd, ...South Africa
NOTE about new M-H-68 mm diaphragms to fit 28mm Mikuni Carbs:
Received diaphragms and they fit perfectly. I still have a little work to do before a test ride but looking at how smooth the operation is I expect a vast improvement.
Thanks for your help and producing a great product.  Regards,   Craig
JBM industries supplies copy carb sockets for the 447/503/582 and 912 engines. They
also supply gaskets for the rotax engines and cable boots etc.
Has anyone on the forum purchased their products, and if so what do they think of them?
If you fit any of their products, is it a mod??
  • I fitted two of their carb sockets about 2 years ago to my Quantum 912 which I am
    half shares on. The reason we fitted JBM ones was because after trawling the net
    could find hundreds of hits about rotax ones failing. I couldnt find any on JBM ones
    failing. The fact that the JBM ones were a lot cheaper did swing it for us to try them
Once they were delivered from America, took about a week, I must say I was impressed with
the quality, they fitted spot on and there was a locking rib inside to locate the carb.
Mine are still like new and I am happy, and would purchase them again.
A friend of mine fitted some to his 582, and they are the same, still no signs of cracking, but
only a year or so old.
Comments about age cracking click here.
This is a large site with much information, so enjoy your stay and check back often.
Gidday Don
I have already restored a 1980 XS650SG and a 1981 XV1000RH, and fitted your replacement Vacuum Slide diaphragms to both Makuni and Hitachi carbs.
They work great with total reliability.
I am now restoring a 1979 Yamaha XS750F which is an Australian production bike.
The bike is all original and fitted with Mikuni BS34-11 carbs.                 I would like to purchase 3 replacement diaphragms to suit the BS34 CV carbs.
Thank you so much. The  H-68 diaphragms worked great and fixed my Honda Shadow. The 20 dollars I spent on the diaphragms sure beat the 140 dollars
quoted everywere else. Keep up the good work
Oh, and by the way they worked/went on a 1983 Honda Shadow 500 with a dual keihin carb with metal slides thanks again,   Chris
Hi mate my name is Lawrence borg i recently brought some diaphragms of u and they are brilliant better then the original by far i would also like an invoice for
another 6 Keihin K'72,S diaphragms for My Honda VF 1000 F2 Its a 1985 model please. Laurie. Australia thanks mate.
The fitment of the Mikuni 70 mm diaphragm of the BS 34 SS CV works on the Mikuni BS 32 that is on my 1982 Kawasaki 650 H2 CSR also.  Awesome fit and
one of the easiest replacement parts I have ever dealt with.  Just as you said it would on your website. james.hopkins1225@gmail.com
I would  like to thank you for the excellent service, the diaphragms arrived here in the U.K. nine days after I made payment.. Fitting the diaphragms on my twin
BS34 carbs was a breeze and the complete job took me around 10 minutes thanks to a well designed, good quality product and the clear instructions on your
website. Well done JBM Industries.     Regards, Martin Baldwin
Hi Don,
I got home seen the
K-72-S diaphrams were here for my Honda VT700c, installed and the bike runs great!!!!!!!!!!!!!!!!!  Thanks, Rob.
Keihin K-72-S Diaphragm-K-72-S Smaller hole for METAL SLIDES Fits Keihin carbs used on 88-89 Honda NT650 Hawk GT (RC31)
Success!!! you can add another bike to your list.  Started right up as it always has runs awesome again!   Tim Davis      tdavis@synergistics.org
Don -I finally got around to installing the diaphragms last night. Very happy with them. The fit was perfect and now the slide action is silky smooth...great
product and beats the hell out of spending big $$ on new slides.   Jack Turner
MZ202 carburetor socket boot
for BING 54
The 70 MM diaphragm I ordered works great in my Mikuni Carb, although it wasn’t designed for this model!  (2000 Arctic Cat 4X4 ATV 300cc)  Your product is
far less expensive than OEM at $139.  Please let me know if you decide not to carry or produce the 70mm diaphragm as I will need to order a few spares.  
Thanks again for a great product and fast shipping.    ....Ben Stacy
Ultralight & Light Sport Aircraft pages:

Rotax replacement parts manufactured by JBM

Rotax 912 & HKS carburetor rubber flanges

Failure modes of Rotax 912 socket flanges

MZ202 rubber carburetor flange socket mount inlet holders

Jabiru carburetor inlet rubber socket boots

Rotax exhaust muffler springs made of stainless steel

Rotax 2 stroke , BING model 54, & gearbox gaskets

Rotax 2 stroke carburetor sockets

Rotax 2 stroke carb & fuel & misc parts quick view with links


Our warranty and fitness for service:

What does it mean "SOLD OUT" ???
Motorcycle CV Carburetor slide diaphragms &

Chart and links for installation instructions for all diaphragms
( Questions & Answers, how to remove & measure to find size. )

Principle of operation and installation

MIKUNI notes and testimonials

MIKUNI BST-40 notes on Virago fitted with Mikuni "flat slide"

KEIHIN notes and testimonials for HONDA 350 & 360

KEIHIN notes and testimonials for Kawasaki KZ440 & 750/4

KEIHIN VG series notes and testimonials on plastic slides

KEIHIN notes on special series molded diaphragms

HITACHI notes and testimonials

Notes on how to repair broken plastic or metal slides
ABOUT US page for JBM Industries

CONTACT JBM Industries page
Motorcycle carburetor holder inlet boots & flanges:

Yamaha 650 twin

GL1100 Goldwing

Rubber Flange Boots for Honda 360 , Kawasaki
440, Suzuki GS1000
Hey guys,   I want to thank you very much!
The M73 diaphragms fitted perfectly on my GSX 400 E careburator. The shipping, your treatment of the costums, the installation, and the instructions were
very good. Everything is fine and my machine howls again :)  Greetings from Germany ...  
Georg Hoppe      hoppe_g@freenet.de
Video page shows how to remove rubber diaphragm from plastic
slide for our K-62 used on Ural Motorcycle.  
Click HERE .
This makes over 50 of your product We have used in our M/C
business for the CB350 & CB360 . They are easy to install and work
just great.                                                                         
Thanks,   Gary & Sandy  
G&S Used M/C Parts
Good Day Don:   I ordered Diaphragms for my Kawasaki KZ1100-A1 Shaft 1982 (BS34ss)THE 21st of Aug.
I received notification that it has been dispatched the same day.I received them in
South Africa
on the 11th of Sept and fitted them Sun 13th +- 1.5 hrs.The bike runs like new.Thanks for your great service.All the Best,  Geoff Slark.