Review on Enhance Your Harley's Performance with the Alpha Rider Pro Carb Rebuild Kit and Mixture Screw: Compatible with Keihin CV CVK Carbs for Harley Big Twin 1990-1999, Twin Cam 1999-2006 & Sportster XL 883 1200 1988-2006 by Steve French

The second one I've bought for a Harley 40mm CV carburetor. They removed the slot for a screwdriver. Now you need to put your hand behind the air filter to adjust it. It's easy to burn yourself on a hot engine. Should be a few inches longer. I soldered a piece of copper tubing to the corrugated end to add length. Still a good product but not as good as the old version.