jet for 19mm phbg carb

gileramhrrep70

Well-Known Member
hi i have just bought a 19mm phbg carb with malossi air filter. i have put it in my gilera runner and it isnt running good at all. it cuts out here and there when it feels like it and then starts up again its weird. ive been told i need to change the jet but i dont know what jet to change it to. the carb settings for my carb atm are;
max jet-98
min jet-45
nozzle-262 AU
gas valve-50
needle-W16
notch-1st
floating-5 gr
if anyone knows what setting would make my bike run nice that would be great.
thanks for any help!!
 
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try to change the needle from W16 to W7 or W3 and then let me know

the min jet try 50 it is more safely for the engine, trust me
 
it depends on what parts your scooter have. the max jet should be between 88 and 100. it depends on weather. temeprature, humidity, .... i can`t not know which jet is otimal. for start use a big one like 100 or 98
than if it is to big put one smaller by 3-4 points
 
jet

i have been told that i should have a 75 main jet. i really dont know what to do now because everyone i know just puts there carb and air filter on and it works. i dont understand!! any more help would be great! thanks!
 
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