Yes, very smart to change all 3 as a set like tires as a set, as spark plugs as a set. The aftermarket might sell aluminum rear sprockets not steel. Smarter to use OEM as the replacements. Ron Ayers website has the cheapest OEM prices. Was sent a battery and finally got around to wet it, but the case was cracked thru shipping. Threw it all the packaging away so couldn't claim it on UPS. Ayers with no excuses sent a new battery to me no charge. Had about $1000 in parts and all came.
Stay stock since you are not changing ratios. Buy spare plugs and spare air/oil filters.
Tormenting the motorcycling community one post at a time