Uni-trak

[corpy]

Well, I must come clean and admit that I don't know, and can't find out, what 'Uni-Trak' or 'Uni-track' means.
My trike has a KZ1100 engine with a head that has 38mm diameter inlet valves and I am advised that this head must be from a Uni-trak. The head doesn't have counterbores for O-rings between it and the barrel.
The engine number on the crankcase suggests an A1 1100 shaft 1981.

Was the Uni-trac an 1100 GPz model made from about 1982?
Why 'uni'? Does it have a single rear swinging arm?
If not, what does it have only one of, to make it a 'uni'? A single suspension unit placed on the centre-line? Did they do this in the early 1980's?

I would like to know a bit about the Uni-trac engine: what extra power or torque the 1mm on the inlets produced, if any, and whether it was generally a better-breathing engine. Perhaps it was fuel injected.
Perhaps I should try to identify the camshafts to see whether they came with the head. Presumably I would have to do this with a timing disc, or are there identifying marks on the shafts? Perhaps just mic across the lobes?
The inlet bores and those of the carbs are standard according to the manual, although the main jets are 132.5 instead of 120.
Advice welcomed, as usual.
Thanks.

[tlc]

You are right in that the single shock makes it a Uni-Trak.

The head will have a temperature sensor for the DFI. What makes it more powerful is the shape of the combustion chamber as well as valve size / cam lift and profile.

[london calling]

Uni-Trak is Kawasakis name for their mono-shock rear suspension.
The 83-85 GP ZX 1100 had the largest valve heads and shim under bucket as standard for the higher lift cams.
The heads for the J1,J2,J3,GPz1100 B1,B2,Z1000R2 and Z1100 shaft all had the same size valves I think
Can't remember if they are 38mm inlets and the ZX1100 are larger still
Have a word with Steve "Romeo" Debben at Debben Performance