Are you frustrated when adjusting your fuel screw for the best idle and cruise on the Suzuki DR650? Your quest for a magic 90-degree screwdriver is over!
 
Just replace the stock fuel mixture screw with this extended one. It's much easier to fine-tune your bike. What does this screw do? It sets the air-fuel ratio at idle and early throttle opening by allowing more or less fuel.
 
It's a great addition to installing a jet kit or any other performance mods where you must re-adjust your carburation to the optimum. If you are travelling temporarily at a higher altitude than usual, this would also help to lean out the low end.
 
This kit includes a new washer, o-ring and spring.
 
Note: This is an extended screw for the stock carburetor, the Mikuni BST40 and it will also fit the TM40. It won't work if you have something else like the Keihin FCR-MX39.