Is you “Zen Bike” the souped up RE350? Oh , yea Paul , That's the Bike that makes me feel like "I'm on Vacation" Zen !
It keeps-up better now than when it was "Stock"
DNA intake , Performance Cam , and De-Cat Exaust , made a +25% difference ! It can BREASE now !
If Honda comes through with the GB500 (2026), styled after there GB350 single - then I plan to get one of them . If they put that liquid cooled 500 twin on it

- then my plan is to go ahead with the 410cc kit on the 350-J.
But , all is OK as is for now.

They make a 500cc kit for the 350-J motors , but its need a new map to make it work , the 410cc kit takes the bore from 72mm to 78mm (stock map).
I'm still getting 70-75 mpg on regular gas as it is !