A note about using Paypal:
There's a Paypal shopping cart
the order page, but you don't have to use it. If you want to pay
via regular mail, that's fine -- check or MO works. Just add up
what you want and email me
set of 24 O-rings for Mikuni 'BS'
Fits most Suzuki GS series and Kawasaki fours
from '80 to
Fourteen bucks. Enough for all four
CHEAP shipping in the U.S., REASONABLE shipping to anywhere else (just about).
If you own a bike of this era, either
need for this kit, or you will.
The whole sad story -- have a hankie ready:
I needed one single intake needle valve seat O-ring, to
a serious fuel leak on a GS-850. Nothing available locally would
fit quite right, so I had
buy a complete carb rebuild kit at $25 + shipping, just to get the
I wanted to completely disassemble and solvent-dip the carbs,
I cringed at the idea of disturbing those ancient, brittle, crumbling
I just knew they'd leak like a sieve, so I put up with an engine
had more flat spots than the state of Arizona. I needed a source
for the O-rings.
Even at $25 each, the repair kits provide only two of the
sizes needed. To do all 4 carbs I'd need three more f*&%!
kits ($75 + s/h!) and some luck & mercy from the dealership
the other two sizes. Madness.
I don't begrudge anyone a decent profit, but I hate being
I searched for sources for a reasonable quantity of these O-rings at a
reasonable price. Close; I had to settle for an unreasonable
quantity, at a reasonable price.
This kit includes 24 O-rings in four sizes:
4 for the fuel intake needle valve seats;
4 for the air bleed needle valves (the little 'idle mix' adjustment
8 (4 each) for the two fuel tubes;
4 for the carb bowl vent 'T's;
4 for the starter (choke) plunger retaining fittings.
(Usually the choke O-ring is OK; I include it to be thorough).
Material = Nitrile (Buna-N), 70 Durometer. This
the ideal material for this application.
An important aspect of these O-rings is that they are of recent
(cure), so they're new and supple; they haven't been sitting for twelve
years getting hard and brittle. This exact kit has been installed
on about a zillion bikes by now.
The rebuild procedure is really pretty simple, and is superbly detailed
by John Bloemer on the GS
Resources web site. The first 'guinea pig' for
O-rings was my own GS850, which now runs beautifully & idles like a
watch. The chore is finding the damned O-rings.
Outside of the U.S.?
Contact me. I've
shipped to Europe, Africa, Australia and South America with no
trouble. Your total cost is $16 US.
These fit the CV-style carbs only -- 1980 and
you have the older slide-type (VM) carbs, see the
VM page. Also note that the kit doesn't include gaskets or
anything else -- just
the O-rings. Lots of 'em.
Contact me here:
Here's the little guys, next to a
common match. The kit is more organized than it
here, with every size identified.
Almost done here, but...
Some bikes use O-rings on the fuel bowl drain screws. Not
but some do. Check yours now. If you need them,
leave me a message in the checkout section.
They aren't included automatically -- if ya need 'em,
you have to ask for 'em. LIMIT ONE FREE SET PER KIT.
To order this kit, go HERE:. Before you do anything rash,
though, you should look over page 3 (Intake