Be interesting to know if they've suffered similar exhaust and chassis issues.
I also like the JZR with Harley engine fit.
Very unlikely. The 90 deg Guzzi engine is well balanced. The forward facing exhaust ports put less strain on the exhaust system.
Understand the prototype is still around with several 100,000 miles on the clock. Narrower back tyre and lower engine output put less strain on the frame of course.