T5 172 malossi carb issue

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Joined: Thu Oct 20, 2011 6:53 pm
Main scooter: vespa px mk1

Thu Apr 25, 2019 7:06 am

Got a T5 172 malossi engine with a 24 24g standard carb, main jet increased to suit. When engine is warm have tried adjust mixture screw but turning in and out has no effect. Idle jet is 50/100, don’t think I can get a bigger idle jet for this carb, any ideas why mixture screw has no effect.
Cheers bruce

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