I initially didn't respond with much context but I will add that I am very surprised tooble that you would even consider booting that tire. A boot no where near comes close the orginal structural integrity of a tire in the critical side wall area in particular and to me I would NEVER consider that option on a bonneville which most take to high speed on ocassion.
Hey, some skydive out of airplanes without parachutes too.
A blowout at a fair speed...tire stress goes up proportional to speed and why tires have speed rating...can be life ending. IMO motorcycles are dangerous enough without introducing one additional risk element.
GOOD LUCK.
PS: The reason why anybody who knows about tires would never recommend a sidewall be booted is because of the stresses on it.
When hitting bumps in the road the side flexes i.e. compresses. When booting a sidewall, the adhesive is under considerable shear force which peels the boot away from the sidewall over time. This btw doesn't occur only when you hit bumps...but every time the tire goes around as it displaces its footprint. A rubber inner tube also doesn't have nearly the structural integrity of a corded sidewall either. This is a very different dynamic than booting the tread portion of the tire where the principle stresses are elongation or strain which have a much higher success rate of keeping the boot glued to the inner ply of the tire. I personally would never boot a motorcycle tire period but would absolutely not boot one with a sidewall tear...ever.
Lastly I will share my two biggest fears when riding a motorcycle. Somebody pulling out on me when I am up to speed and a catastrophic tire failure at high speed. I prey every day I ride that neither will happen to me or any of you guys.