yeap,crank seals are mandatory on 550's.generally gaskets usually do not go bad assuming proper torque is retained on hardware preventing movement of parts although on 440/550 the base gaskets have thin shoulders and likewise on 550 head gaskets.
ada and tbm girdle bolts right on kawis with no machining.
r&d needs clearancing of cylinder.
kawis can crack once you put heavy pipes and high compression.
with the tee in the return line,the primer will suck air from the tank or if you're lucky enough there will be gas left in the line that it may suck but??
best place is to put the tee on reserve line coming from tank.
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