RCU Forums - View Single Post - Will the YS 60FR bolt in the same as an OS61SF for direct swap?
Old 11-16-2014, 04:03 PM
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The "filament like" imperfection is definitely there on both of my Classics. When I got my first Classic I thought I got a one off but then I checked my other YS LSs and it was there already. So definitely from the same mold and has been that way for (20+?) years. Not machining the Classic to square off is a very interesting find, wonder if this was intentional or an omission for the small batch production.

David, I'll check the width of the firewall, thanks for the reminder. That FRP mount looks great! Where could I acquire one? Do you think it's rigid enough?

It's kind of crazy and cool we could talk about engine mounting dimensions and mounts between OS/YS for 3 pages!