I just replaced all my spark plug caps with new purchased from California Power Systems in Corona. These were >$40.00 each. They were listed as:
https://www.cps-parts.com/catalog/rt...ax15-09442.php . These were listed for the 912 series.

When I went to change them out, I took off NGK VD05FMH 5 ohm caps. They had the number 7 on the collar right around where the spark plug goes in. I looked these up on Amazon and found:
https://www.amazon.com/8425-NGK-Spar...omotive&sr=1-3 .
This looks like the exact same cap. They cost 27% of what I paid CPS. The old ones I took off were working fine but since I had no idea how long they were in use and the Rotax service period is to replace at 200hrs, I replaced them with a spark plug and oil change. Now I am wondering if these from Amazon would have been just fine to use. Have any of you out there used these?