Dont recall the name of it.. I just Googled UTV engine rebuilders ..Picked one, I emailed the Owner.. he said he was 99% sure one of his YAMAHA rebuilts would bolt up where my HISUN is now.. The Hisun is a Yamaha CLONE.. .. He also said it for any reason it did not, he would take it back.. He also had free shipping .. If mine fails again, I will likely go that route . Currently mine is still running