I have a similar issue..1996 900 zxi just bought in July with a 1and 1/2 old SBT engine and the first day out seized the 3rd cylinder. The local kawaski machanic ordered a new top end kit and carb rebuild kits from SBT and said the crank looked fine. Got it back together, rattle in 3rd cylinder. Thrust washer was destroyed. Now the crank is with SBT. What could cause the 3rd cylinder to run lean and cause all of this damage? Alos, is this common with ZXIs?
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