Vespa Club of Britain forum

When shutting the throttle on my PX200, the revs don't fall for half a second making gear changing etc a pain. Oil seal behind stator plate has just been replaced and I have got to check mixture screw setting (1.5 turns out as a start point?) but anyone have any other ideas? Blown base gasket shouldn't have an affect should it? Thanks for any help, Mark

'Blown base gasket shouldn't have an affect should it?'
only a little bit!

Sounds like a weak mixture, or air leak, could be lots of things - worn slide - carb gasket - carb loose - head loose (but you'd hear that) drive side seal (but performance would be down with that)

Check carb first.