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Most will tell you that the piaggio 50 engine is a very tuneable engine. The piaggio 125 engine is also very tuneable. They're both 2 strokes...
Try googling the name of the carb then. I'm sure there's a picture somewhere showing the different screws on the carb.
The idle screw will have a spring on it. Screw this in and start the bike and adjust. Don't screw it in too far as you can damage the throttle...
What weight rollers do you have in also ?
There is no specific jet you need. Your better to buy a box of jets and start at the highest and work your way down, while plug chopping, until...
Anyone selling a dellorto 21mm carb for speedfights? Can be either the black/race or standard edition as long as its complete.
The best value for money mod is a sports pipe for speedfights. This will set you back around 120-140 pounds (which includes price of pipe, price...
I'm from Atherton near bolton.
Sounds like an air leak somewhere. Check all gaskets.