TOPIC:

I was unable to find much info online for the above cams. I have a set of NOS Yosh cams for my KZ900 but lost the cam card years ago. Anyone have this info from back in the day. Thanks

Here you go.
Blurb copied and pasted from the WEBIKE shop.

ST-1
MAX LIFT (mm) IN 9.50mm/EX 9.00mm
1mm Duration (Degrees) IN 245-degrees/EX 245-degree
STD Tappet Clearance (mm) IN 0.20mm/EX 0.20
It was a POP YOSHIMURA habit, and is a lightweight camshaft for Z1/Z2 which achieved the word with modern technical force "Power-up and weight reduction of air-cooled large engine displacement vehicle. It achieves approximately 20% (600g) weight reduction by 2pcs. from a large diameter hollow processing that requires very advanced technology. It improves acceleration response coupled with a gyroscopic effect. It also succeeded in lowering the friction loss by applying barrel polishing treatment to the surface processing, and raising the durability.
* The indicated cam specification is calculated from the camshaft design value.
*There might be some discrepancies by lot due to manufacturing factors.
* Though bolt-on installation of ST-1 is possible, if you require further accuracy, we recommend you to readjust the valve timing.

This was posted on this forum a couple of times by a couple of members, but it can be hard to find and pictures keep disappearing. So I made myself a copy. The 900 is the first two lines. Bonneville being the Stage 3 equivalent and Road Special is Stage 1.
Hope this helps.

Thanks