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 Matt Charlton

Mmm, let's try. Installed it in the CV carb of my 2000 Harley FXST Softail after changing the jet. The o-ring, washer and spring in the kit are actually very good, nicely separated in a small resale package. The packaging was actually pretty great, no bent tip of the set screw, not bent, it came in a small strong clear plastic tube nicely packaged in a small resealable bag. So the packaging and delivery came pretty quickly, there are no complaints. I'm concerned about the adjustment screw which I cleaned with carburetor cleaner and a soft white cotton cloth. During the cleaning, I was surprised by the amount of garbage and firmware. The lining came loose on the corrugated floor. Look closely at this screw. As you can see it's a little rough. The threads were full of small sawdust, which I removed with a toothbrush, wooden toothpick, and kerosene. After all the pre-cleaning, I installed it and the tip size is bigger, it doesn't stick out like the original. After turning it back 1 1/2 turns after reinstalling the carburetor it felt a little loose, I don't know if it will go back yet. I hope that works. I've seen and installed these other brands of adjusting screw in carburetors before this one, I think they were sent in error, that would have been a simple mistake. I'll know if it really works after a test. I hope it works, we'll see, you never know. However, if that doesn't work, they can always send me a replacement or give me a refund. I'll write more after testing it, stay tuned. Update - the carburetor does not fit properly and fits too loosely in the threads which loosened during the test ride, luckily it didn't fall out. I installed the original bike that I took off, now it works perfectly. I hope the seller can send me another one because I really want one that actually works so I can give a good honest review. Unfortunately it didn't help me.