NICECNC Air/Fuel Mixture Screw Adjuster for MIKUNI BSR BS CVR CV Carburetor Compatible with Suzuki DRZ400S DRZ400SM,Gold

This NICECNC adjuster works great. It screwed right into my LTZ400 carb with zero issues and fit perfectly. It is so much easier to fine-tune the air/fuel mixture now without having to burn my hands or struggle with a tiny screwdriver. If you still have the stock Mikuni carb, this is a must-have upgrade for easy adjustments on the fly.

Worked perfect on my 2001 DRZ400S with the Mikuni carb. Previous owner lost the spring, washers and o-ring, giving me an erratic idle. For the cost of just they parts from the dealer, I now have an easy adjustment screw. Must have for any DRZ

Works as designed. Great fit

This works great and it's much easier to dial in my carburetor compared to trying to get a screwdriver or flathead bit in there. My only problem is that when it was adjusted to the same setting as the old fuel screw, it was a bit wobbly. I worried that it would vibrate out on a ride and be lost, so I had to turn it in a bit more for it to be secured. Maybe a small bit of plumber's tape would secure it?

Fit perfectly on my 04 Polaris Predator 500. Simple and easy install.