I'm already ahead of you guys. It is a true 420cc. I think by looking at all the internals. It's whatever the company could scrounge up cheaper and put it all together.
After some 1/8 mile testing I'm buying a rod, flywheel, and a camshaft. So stay tuned at my build and I will keep everybody in the loop as to whether I can push it hard enough to blow it up. Because in about 2 weeks or so I'm gonna **** sure try ! All I did so far is remove governor completely, air filter adapter and new filter, and exhaust with a proper rejet by drilling the jet out myself. Everything else is bone stock.