Review on 🔧 Johntruck 2PCS Valve Tappet Engine Adjuster Tool for Motorcycles ATC, ATV & Scooter Gy6 - 9mm Valve Screw Adjusting Socket Wrench with 3mm Adjustment Head by Bill Pulse

I really like that it has lines on the 3mm setting so I can see if I'm off my settings when tightening the lock nut. I used it, started the engine and rechecked my spacing and found it to be correct where I installed it. I used to use wrenches and spent more time adjusting and readjusting because I lose settings. I also found the rubber grip to be a good addition as I can hold onto a 9mm while tightening the lock nut. A very useful tool and cleverly designed.