I have put one of my ST engines into Royston at REPS racing, he says the cylinder head has cracks running from the spark plug holes in No 2 & 3 to the exh valve seat, this is quite common and they seem to run well with no adverse effects, indeed these cracks look to have been there for a while.
Has anyone else heard or seen this on Z heads , any comments?
anyone got a spare ST head just in case ?
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Cracked head ok ?
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Vendetta761
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Cracked head ok ?
1980 Z1000 E1- ST , 1980 Yamaha XT 250 3Y3 , 1979 Moto Guzzi G5 special , 2000 V11 special, 2009 XT660 X
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Ginger Bear
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