viper1900

What size jet should I use on my watercooled carb to get a really good top speed?
I have a air cooled bike with a performance exhaust.....

pb x-treme

jetting depends on a lot of vaiables, temperture, altitude,mods that you have done... so what i would say is watch your plug and jet up or down accordingly. white plug= jet up, black plug= jet down

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Sleeves

Is it a C1 , cause i have the jets here for it , i found it made a bit of a difference , but never really started testing with them , i have been told to start rich and come down from there , checking the plug , after every change .

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RCMRRA OWNER
06' P1 BMS competition BZM 15.5hp Open 50cc
05' DM Telai - ZPF 18 h.p Open 50cc
07' Pitsterpro 125cc
08' CBR125r
96' Gsx-r 600

Bigbone57

Dude not enough info...What engine do you have, what size is your carb, and do you live at altatude if so whats the elevation. and the pipe, OMG long stinger, or short. If its a 39.9cc with a 14mm at 1100 feet or lower start with an 85 and watch your plug...if the stinger is long (14" with the silencer) 88 and watch your plug or better yet smoke good, no smoke bad....17.5 carb same size motor 90, again smoke good, no smoke bad....19.5 100 see above