Review on 🛵 Glixal ATKS-029 GY6 50cc 100cc High Performance A9 Camshaft for 139QMB 139QMA Scooter Moped ATV with Enhanced SEO by Daniel Casper

To be honest it's hard to tell the difference as I installed the large diameter kit at the same time. However, those two things along with the 19mm carburetor and retune were huge. These things combined really woke my little scooter up. If I ever have free time I will do a head-to-head comparison (including vernier measurements) of stock and a9 cams on both stock and large-bore setups. In any case, even if it didn't bring any increase in performance, it's a new camshaft, while my original showed some wear marks on the cams. At around $12, it's worth replacing.