Another excellent revamp!
I liked the original Kralhi for many reasons. I felt like it was a better use of the combiner model placeholder than the Toa Kaita, simply because it served an actual purpose in-story. I also liked the combination of colors the original presented. This is not a combiner model and has a very different color palate, but I won't be judging it on those criteria.
This fellow looks very robotic, impressively so, even by BIONICLE's standards. It invokes an impression of a Vahki prototype without look too much like a Vahki. Its weapons are well-designed. The mesh of colors you used surprised me - it looks robotic and almost like the metal-alloy steampunk color scheme I mentioned in the War Turaga thread. The use of Metru brown, gold, and trans orange make it look like metal patchwork, but an orderly, deliberate patchwork, which works perfectly for the model. I had been tossing around ideas for a similar, humanoid steampunk model with similar colors, with a more thrown-together look, and so you can understand my surprise when I came upon this.
The torso is absolutely mystifying, a perfect blend of pieces I can't begin to decipher, perhaps due to my inexperience with Toa Hordika pieces (I bought only titans and one Visorak in 2005, although I have gotten some Hordika at tag sales since). Everything else is well put together as well.
My only real complain is the emptiness of the eyes. While you can get away with this in a robot design, it strikes me as jarring nonetheless, because of the trans orange elsewhere on the body. Giving it the Piraka teeth probably made eyes implausible, but I'd still be interested in seeing a few tinkers to see if you can get some eyes in there.