Thanks for the reply I had the valves and seats recut and the machinist remarked on how tough the exhaust seat was to cut. The work done has resulted in no tappet clearance on said exhaust valve (actually the valve is held open at all times).
Ron I just saw an earlier post of yours (4 yrs old) saying you had some "seat saver" exh valves made up, I find this interesting as I measured the seat insert diameter on mine at 1.75" and got thinking a new bigger valve might get me out of installing a new insert and the problems that might come with that. In fact I am wondering if this is a normal size for the insert, it seems large to me ?? The dbd500 valve as I understand it is about 1.53"
The valve as found appears to be from a different model (65-1644 BB32 350cc) however I think it is the same size as standard 58 model DBD 500cc am I correct ?