Sorry to tell you but it's another throw-away item. Most people reckon that when the belt is worn out so is the tensioner. Don't worry, the labour content required to replace the cam belt is so high that you won't notice the additional cost for the tensioner. You should also think about the water pump while the engine front end is exposed (especially if your vehicle has suffered from any overheating; the pump seal hardens and starts to weep but the pulley flings the coolant out so you can't see any signs of the leak). Keeping these autos beyond the warranty period is a high risk mission.
Suzuki Bandits have an automatic cam chain tensioner. No manual adjustment is necessary or possible.
the water pump is driven by the timing belt. highly recommended to replace the tensioner, tensioner and idler pullies, and cam seals.
No Harley Sportster has ever had a cam chain. The camshafts are gear driven, directly off the crank. No tension adjustment required.
The 2007 Volkswagen Passat has double overhead cam (DOHC).
The 2010 Volkswagen Passat has double overhead cam (DOHC).
The 2009 Volkswagen Passat has double overhead cam (DOHC).
The 2013 Volkswagen Passat has double overhead cam (DOHC).
The 2014 Volkswagen Passat has double overhead cam (DOHC).
The 2012 Volkswagen Passat has double overhead cam (DOHC).
The 2008 Volkswagen Passat has double overhead cam (DOHC).
The 2004 Volkswagen Passat has double overhead cam (DOHC).
The 2003 Volkswagen Passat has double overhead cam (DOHC).