Some problems
Had some problems when received engine. Valve pivot was slightly bent causing the valve link to over centre and therefore valve mechanism to be jammed. I disassembled valve interconnection and reassembled in correct position and and was able to try and straighten the pivot pin which was semi successful but was concerned about breaking so didn't get it fully straight. After this was done engine would start and run but then stop as valving links where out of plane. Disassembled and added a tiny washer to get links into better alignment. Engine then ran beautifully for a while but then stopped suddenly as valving link over centred again and therefore jammed value mechanism. Not sure if it is the now slightly loose pivot or other valve link issue that is causing jam. When this engine does run it works fabulously...... huge potential but...