Sherco 2016 Keihin carburettor mixture screw. 

Is richer screwing it in or out?

Thanks

in (clockwise) richer,  out (counterclockwise) lean. 1.5 turns out is usual start point if it needs to come out much more than that pilot jet too large and conversely if it's within half turn of the seat pilot to small (lean)

in my sherco it is more like half turn from closed

https://youtu.be/VnpYMmsfRzw

On 3/15/2019 at 3:09 PM, stpauls said:

Sherco 2016 Keihin carburettor mixture screw. 

Is richer screwing it in or out?

Thanks

Clock wise is richer on keihin.If you want a better running bike install a 120 main jet and a 55 pilot.At sea level use a 122 main.Most trials bikes are lean on bottom and rich on top stock.Most stock bikes with keihin,s are running air screw in to far because of this.With the jetting I gave you you will end up with the screw alot closer to 1.5 out.You will have more snap off the bottom and and bike will run way cleaner and rev better doing this.