I was unable to readily find this info, but now have the experience to back it so I will make it easy on the next person. 95 and up Wetjets have 61x Yami motors (ready to throw into pre-94 model SJs) and either have the 44 mm or the 46 mm SBN carbs and the way to easily tell the difference by just looking (not actually ripping into it and micing) is the stamping on the intake manifold. The 44 mm has the 61x stamping with torque specs and sequence like any Yami manifold. This is found on the Duo 300 and ZX models. The 46 mm has "Wetjet" stamped on it and is found on the Kraze VLS model (that is what the VLS indicates). The Wetjet intake has the built in reed stuffers as well. Sorry if this was already covered somewhere but I couldn't find it. I have now owned both the Kraze and the Duo 300 and for all the bad press they really are fun skis especially when they can be had for $200 to $400 like mine.