Wolf Creek
Racing - NATIONAL Distributor for Mikuni PHH Carbs
MIKUNI CARBURETOR
IDENTIFICATION for SIZING
This page is intended to help identify the type of Mikuni carb by
either the top view of the Float Chamber Cover, the Float Chamber cover
gasket and/or the Jet Chamber Cover gasket. PLEASE NOTE THAT MIKUNI
WILL BE PRINTED SOMEWHERE ON THE CARB, IN SMALL OR LARGE LETTERS, EVEN THOUGH
IT MAY OR MAY NOT SAY SOLEX.
This is the standard 40mm PHH most common to North America. Referred
to as Type R 40mm. Throttle Butterfly will have 165 stamped on the
back of it.
This is the second style of 40PHH, Type T. This unit was OEM
for Toyota, hence - Type T, and came on several models that used
the 18RG and TTC motors. Uses standard 40PHH kits and parts believe
it or not. The Type T jet cover gasket and float adjuster gasket are NLA
however. It just looks funky because the Float Chamber Cover is so
different. Throttle Butterfly will have 165 stamped on the back of
it.
This is the Type S4 version of the 40mm and 44mm carbs, also called
the 4 bolt top cover. Both 40 and 44's were made in this style.
Looking at the back of the butterfly will confirm size, 165 is a
40mm carb, 175 is a 44mm carb. Note that the kits will be the same
for both 40 and 44mm carb. Simply specify Type S4 Carb.
This is the more well known Type S5 carb. Now, once again, these
came in both 40mm and 44mm versions but are best known in North America
as the 44mm carb. This is also referred to as the 5 bolt top cover
style of carb. Looking at the back of the butterfly will confirm size,
165 is a 40mm carb, 175 is a 44mm carb. Note that the kits will be
the same for both 40 and 44mm carb. Simply specify Type S5 Carb.
NOTE: MIKUNI NOW ONLY MAKES A
UNIVERSAL STYLE FLOAT CHAMBER GASKET THAT FITS BOTH THE TYPE S4 AND TYPE
S5 CARB. IF YOU LOOK CLOSELY, YOU CAN SEE ALL OF THE SAME ELEMENTS
IN EACH FLOAT CHAMBER GASKET EXCEPT FOR THE 5TH HOLE IN THE FRONT. NOT
TO WORRY, IT WORKS PERFECTLY AS THEY INTENDED IT TO, JUST SIMPLY SLICE OFF
THE PART OF THE 5TH HOLE THAT HANGS OUT THE FRONT AFTER ASSEMBLY ON A 4 BOLT
TOP CARB!!
This is the Ubiquitous Early Type Q carb. Orignally all Mikuni
carbs were this style and actually came in not only 40mm, 44mm, but 36mm
and the big boy 50mm race carb. All of these are fairly rare but
the 36mm and 50mm are the rarest. These are also referred to as PHH2
carbs but for our purposes, we will call
them Type Q. The 44 PHH2 was also the earliest original "Solex"
option carb for the Datsun 2000 Roadster. Mikuni does not offer
a rebuild kit for these carbs but WCR has their own kits available including
the OEM gaskets shown. Just Ask!!
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