Husa , the later model TZ engines would do the factory recommended 1500Km on a crank - and plenty were taken to 2000.
Pistons happy at 500Km , and fit a new ring as soon as blowby was seen.
Thing is at 500Km a piston would simply be worn , with double the original clearance - not ready to self destruct by falling into the port after 2 practice sessions.
Ive got a thing thats unique and new.To prove it I'll have the last laugh on you.Cause instead of one head I got two.And you know two heads are better than one.
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