I had to cut the fins on mine for clearance with the FI exhaust. The Z1 cover increases the amount of lube by about 1/2 liter. I also have a diff cooler and a temp gauge installed. I've seen temps as high as 270F before turning on the pump and fan. With the cooler, there is 3 liters of lube in my set up.
I have all of the SPL catalog on my Z. Solid diff bushings, sub frame bushings, etc. The diff bushings really didn't make that much difference in noise.
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