Well, another smoking Xr. It's a 1983 XL600r and yep, like any Xr would... It's now smoking! Sometimes it only does it when the bike is first started. But today while following I noticed a huge cloud of white smoke pouring out of that beast when it was revved up (going through a tunnel). I know we are mostly yamahaulers here but anyone ride red? I'm guessing rings... And on the side of the top end there is a key hole looking thing that leaks oil. I think can tensioner? I can't really remember. It needs an O-ring but that seems that it would be pretty hard to replace in that location.