My 1300 head is marked 218143. Anyone have info on that? MikeC > Ignore Mk I and II heads as they are not interchangeable with 1300 and 1500. > All the cylinder heads are stamped with the part number as follows: > 515573, small exhaust valve 8.5:1 1300, flat pistons > 515973, as above but 9:1 > 218140, largest exhaust valves 9:1, 1500 flat pistons. > 218141, largest exhaust valves, 8.5:1, 1300 flat pistons > 218142, largest exhaust valves, 9:1, 1300 flat pistons > TKC1155, large exhaust valves, 1500 flat pistons > TKC1156, as above but 1300. > TKC1155/6 do not have the water take off in the RH rear corner. > Other TKC numbers are a variety of 1500 heads for the US market, some with > inserts, some with air injection holes. > The 515573 and 218141 1300 heads can be used on a 1500 engine with dished > pistons and gives something around 9.25:1, unfortunately the 218141 heads > are UK and the 1500 dished pistons are US so never the twain shall meet. > John Kipping
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