Originally Posted by
Dan Vincent
In 1954 K&B announced their new .09 addition to their popular line of greenhead engines. They already had them in .15, .19, .201, .23, .29, .32, .35 & .45 so I was glad to see an .09 being added. I waited and waited and K&B finally started producing them in 1957.
The first production run had a problem of the exhaust port sagging so they redesigned the case with a baffle in the center of the port to keep it straight.
Here are pictures of both types. K&B also offered accessory ring mounts for firewall mounting.
The Torpedo .09 was an amazing little engine and produced the highest HP per displacement of all K&B greenheads.
Dan, I am trying to refurbish my old K&B 23 and would like to change out the head bolts from phillips to hex cap bolts. Is there any info, anywhere in this world that gives me greenhead part numbers and bolt sizes? I assume they are english and not metric. I seem to be unable to find any cap head bolts that small. Any suggestions? Many, many thanks.