Hi
As I recall
If you take the inlet manifolds off with the Carburetors, it gives you the wiggle room.
Obviously taking everything else off out of the way is an advantage, and if you choose to drop the sub frame back (but not completely remove it) it helps but only a little.
Again if I recall you have to jiggle the airbox to carb gaiter out of the way, which if it is fragile, can be a risk.
But it is doable with the manifolds ( You have an 89 RC) on the carb....I think!.....Have a go!
“There is a delicate ridge one must ride between fear and reason on a motorcycle lean too far in either direction and there will be consequences.”
Lily Brooks-Dalton, Motorcycles I've Loved: A Memoir