anybody got a success story where aftermarket oversized valves have brought back to life a head where the seats were too worn to install stock sized valves? I found a T 140v single carb head but it looks in very questionable shape--- ie- deep pocketed and nicked up seats-- gasket surface and combustion chamber nicked up-- guides probably bad also-- without the head in my hands is there a way to measure if oversized valves will " go get" unused seat surface? I know these heads are getting rare so I'm seeing if this head can be brought back. thanks, Bob

59 Bonne (in high school!)--67 TR6c (building)--68 Bonne(building)--69 Bonne (sold!)- 70 TR6r (sold!)-79 TR7v custom (building) - CRF 250x & XR 400 dual sport w/ SM wheels (super fun!)