Scooterotica

scoot runs fine up to say half throttle but when I give it a fist full it hits a point in the revs were it starts to splutter and wont clear if I hold it open. I upped the main to a 128 which improved it but its still there,although if I put choke on it takes off like a scalded cat. Does this mean I need to go bigger on the main. Greatful for any pointers.

give a full spec of your engine and carb size matey and youll get plenty of pointers.

Check my post about "Fast Flow" taps. may be a problem with your tap........like Camel says post your full engine spec' and you'll get more replies

gp 150 WITH GT186 top end , 28mil phbh and a sterling pipe. jets are 264 atomiser 128 main and the other jet i no is the one that screws in next to the atomiser (pilot jet)? this one is a 50. it also has elec ignition (indian i think).

the fact that it runs better at all with the choke on means that its weak over 1/2 throttle ...a bigger main jet may correct this but it could be also that your atomiser/needle combination is weak also ...my advice is to get it on a dyno .

or have a skip thru here.
http://scooterotica.org/forum/viewtopic.php?f=9&t=14

cheers for the info. rich t did tell me to fit a av266 atomiser and an x13 needle so i will replace these and see how it goes. thanks for the link to carb set ups to.