Suzuki GSXR-1100 1990 Service Manual page 109

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FUEL ANO LUBRICATION SVSl"EM 4-6
DI APHRAGM ANO PISTON OPERATION
The carbure tor Is ;:, vadable •vP.ntun type. who-:.~ vc otod c,oss sec tion area is lncfeaMd o r decreusad
;Juto,natically by the piston valvu ( 1, which mov~s ;ic:c:ording to the ,,e9ativP, pre ssure prascnt o n the
r1ownstraam side of thu vl}nl1.1fi
S• ,
NegRtivP. pres sum is a<lr'nittect into the d iaphraorn chamher
(2:·
t hroug h
two oflfices
·J',
orovided in the piston v.:ilve
~f'
f'ii:;iug uonalive 1>ressur~ ovP.rcomes tha sJJd 1 \{1 • ' : t. fo,ce, caus ing tha µ,ston valve : 1: 1 0 rise tu iucrease
thP. said area .ind thw; 11r~veo1 1h~ Air vP.locity trom h,cwt,sin~ J Thus, a ir velocity
i,,
the venturi passage
is 1<.0IJl ff.dativ(!ly com:,tAnt toe
improvult
fuel a1 o rni1,1uion and to r sucur'ing o p1imum rntio of fue l/ai, ,nixt,u-P..
~
/\IEG.ATU/ F PRESSURE
A,IR FLO\N
~ NEGATIVE PRF.SSURE