Motor is a Spears built motor. I have the build sheet. Made 72 HP on renegade MX4. Fully safety wired. Oil changed after every race weekend with Motul. Two seasons on it. Doesn’t have block off plates since I used them on my current motor. Been out of the bike and sitting in a climate controlled garage. Was raced in AHRMA and some CMRA rounds. Strong motor and will make you a competitive 2nd Gen bike. Asking $1500. Located in Topeka, KS