A sample from the products for the E-4 Cam Chain Tensioner include: O-ring 13 X 2.5, Sprocket,cam(32t), Bolt,tensioner, Chain, Cam.
The most expensive part in this assembly is the Chain, Cam.
The most reasonably priced component used on the Rtl250s 1985 1986 Hrc E-4 Cam Chain Tensioner is the Bolt,hex 6x10.