Feature: 1. Fitment: Chain tensioner adjuster is a replacement for Massimo MB200, Baja Mini Bike MB165 and MB200, Falcon 200 Mini Bike, TrailMaster MB200-1, Coleman CT200U and CT200U-EX, Hensim MB165 and MB200, Hensim Doodle Bug, Motovox MBX10 and MBX11, Classic 105cc, Classic 1000W, MM-B80 80cc, and select Honda and Yamaha models including CRF50F, CRF70F, CRF80F, CRF100F, XR50R, XR70R, XR75, XR80R, XR80, XR100, C70, CT70, XL75, XL100S, XL80S, and NS50F. 2. Chain Tension Issues: A loose chain may cause vibration, chain skipping, or derailment during operation. An overly tight chain increases friction, accelerates wear on drivetrain components, causes abnormal noise, and may lead to chain failure. 3. Optimal Performance: This chain tensioner adjuster helps maintain proper chain tension, improving drivetrain efficiency and ensuring smooth, consistent power delivery. 4. Extended Component Life: Proper chain tension reduces premature wear on the chain and sprockets, helping extend service life and reduce long-term maintenance costs. 5. Easy Installation: Designed for straightforward installation and adjustment, enabling quick and accurate tension calibration without specialized tools. Specification: Item Type: Chain Tensioner Adjuster Material: Iron Fitment: - Massimo MB200 - Baja Mini Bike MB165, MB200 - Falcon 200 Mini Bike - TrailMaster MB200-1 - Coleman CT200U, CT200U-EX - Hensim MB165, MB200 - Hensim Doodle Bug - Motovox MBX10, MBX11 - Classic 105cc, Classic 1000W - MM-B80 80cc - Honda CRF50F, CRF70F, CRF80F, CRF100F, XR50R, XR70R, XR75, XR80R, XR80, XR100, C70, CT70, XL75, XL100S, XL80S - Yamaha NS50F Package List: 2 x 15mm Chain Adjuster Tensioners 6 x Mounting Nuts