Posted 10 Aug 2016 (edited) Found a replacement radiator cap for the 912 that is for a BMW motorcycle. Part #17112345074. This is the 1.2 BAR that is now recommended by Rotax. The price is $38.78 plus shipping, still not cheap but about 1/2 of what Rotax wants. You can order it from your closest BMW Motorcycle dealer.I have one installed on my engine. Edited 10 Aug 2016 by wypaul Share this post Link to post Share on other sites
Posted 19 Aug 2016 Try http://www.evanscoolant.comNo pressure cap needed. I am using it in my Viking powered zenair. Very happy with it. Share this post Link to post Share on other sites
Posted 19 Aug 2016 Until you have a leak while on a cross country.Less efficient cooling and immensely expensive. No thanks. I'll stick with Dexcool. Share this post Link to post Share on other sites