Manual cam chain tensioners are 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. 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 the manual tensioner. No matter what the engine does, the cam chain tension will remain constant. An manual cam chain tensioner is a must for any kind of performance riding. manual tensioners are CNC machined from billet alloy to exact tolerances for perfect fit. Adjustable, & Strong No fear of automatic tensioner failing Extend Cam Chain Life Please make sure the oil passage is blocked off before installation. Gasket included for oil spilling prevention. Best Cutting on the tensioner bolt Need using 7mm and 14mm tools for screwing hexagonal nut and thread description: Condition: Fitment Street Applications: for GN 250 82-83, 85/88 GS 500E/F, 89-08 GSF 400, Bandit, 91-93 GSX 1300, , 99-07 GSXR 600, 97-00 GSXR 750, 96-99 650, Tempter 83 GV 700, Madura 85 GV 1200, Madura 85-86 GV 1400, Cavalcade 86-88 GZ 250, 99-09 for SRX 600, 86 SV 650, 99-07 XV 700 Virago, 84-87 XV 750 Virago, 81-83 XV 750 Virago, 88-97 XV 920 Virago, 81-83 XV 1000 Virago, 84-85 XV 1100 Virago, 86-99 Off Road Applications: for CRF 150R, 07-up CRF 250R/X, 07-up CRF 450R/X, 02-up XR 400, 96-up XR 650R, 00-up 550, 82-83 600, 84-94 Colour: red Material: metal Package Contents: 1 x Cam Timing Chain Tensioner Only the above package content, other products are not included. Note: Light 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.