This manual cam chain tensioner is designed to replace the automatic and hydraulic tensioners on high performance engines. The automatic adjusters can back out when the throttle is closed suddenly at high RPM. This allows the cams to go momentarily out of time, and can result in bent valves and/or serious engine damage. The hydraulic tensioners have a tendency to put too much tension on the chain guide under high RPM/high oil pressure conditions, resulting in premature wear. Both problems can be eliminated with the installation of a manual cam tensioner. No matter what the engine does, the cam chain tension remain constant. A manual cam chain tensioner is a must for any kind of performance riding. These manual tensioner bodies are CNC machined from billet aluminum to exact tolerances for . No more rattling, excessive chain wear or changes in camshaft tension. Specification Type: Engine Part Note: Make sure to swap the thin metal gasket off your stock tensioner before installing the one. Setting and adjusting a manual cam chain tensioner requires a certain level of mechanical ability and understanding about cam chain tension. If you do not feel comfortable doing the installation, consult a qualified . Tensioning a cam chain incorrectly can result is serious engine damage Fitrment For 250 EXCF, XCF, SXF 2007-2022 350 SXF, EXCF, XCF 2011-2022 250/350 EXCF 2023 350 FREERIDE 2013-2015 Color: Orange Material: Aluminum Alloy Package Contents: 1 x Motorcycle tensioner set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.