Keeps chain running smoothly
2-5/8″ arm
Larger 1-3/4″ roller
Improved & updated
Drive chain tensioner with roller for the Baja Mini Bike MB165 & MB200 (Baja Heat, Mini Baja, Baja Warrior)
Note: The arm on this chain tensioner is 2-5/8 inches long Drive chain tensioner with roller for the Baja Mini Bike MB165 & MB200 (Baja Heat, Mini Baja, Baja Warrior).

Note: The arm on this chain tensioner is 2-5/8 inches long. Older versions were 2-7/8 inches long. The 2-7/8 inch chain tensioner can be found at the link below:

Chain Tensioner with Small Plastic Roller & 2-7/8″ Arm for the Baja Mini Bike (Baja Heat, Mini Baja, Baja Warrior),5

What is the replacement part for the discontinued 2-7/8 chain tensioner with the smaller roller for the MB 165. Does the 2-5/8 with the larger roller work Would appreciate any input. Thanks
It’s possible that you may be able to directly swap the discontinued 2-7/8″ chain tensioner for the newer 2-5/8″ one, though we haven’t confirmed that. Alternatively, you could replace the entire jackshaft assembly with the Gen 2 version – the replacement jackshaft assembly will include the new 2-5/8 chain tensioner + a new steel cover and would retrofit the MB165. The jackshaft assembly with steel cover can be found here: https://www.monsterscooterparts.com/brands/baja-motorsports/models/mini-bike-mb165-mb200/bajamb165jackshaft.html

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