The 530s in particular seem to have a habit of eating their own internals for no apparent reason. One or two lemons is one thing, but there's been at least half a dozen different, premature 530 implosions reported on the modern forum I frequent.
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The 400/450/530 are all identical except for stroke dimensions, even 66 failures amongst the 2000 odd sold over last 3 years is VERY low, something like 2.5%, not acceptable i agree, but is common in any automotive manufcturing today,even cars have engine failures, Gen3 Holden v8 for example. You then have to account for things like the owner running it low on oil to cause the failure, very common with engines holding so little oil in bikes these days. I have a guy who says is using 200ml per 80k ride '09 450 Kt,rode 100k with him last week,we get back to car,he shows me window half full to prove his point, I say let sit and have a beer, 15min later window is full, i drained oil at home,sump and filter, he had used,assuming started with 600ml he says he put in, it still had 550ml approx, so 50 not 200ml in 100 k, quite normal with this engine, it doesnt take long to see a lot of problems on VERY high performance engines are starting to occur form incorrect or too little maintenance, like i say, any brnad has mechanical warranty problems, not just Kato's, I have owned riddern and raced 17 over 18 years,average 3500k year, ONE WARRANTY CLAIM.
kT