Help torque converter size needed!!!

Looking at the engine owners manual,I can see where they (Lifan) get the extra horse power out of the motor. They use a lot of terminology to explain it, but it basically comes down to milling the headband porting it! IMG_3173.jpg
Are the mega moto from Walmart new or not that popular? Because there are hardly any videos about them. There are tons of videos about the colemans
There aren't many video's about them (the 212 Pro's) or other 212's, except for the 80 and 105 models! There's a lot of 105's getting a Preditor 212 engine installed in them, and becoming a "death trap" mini bike! LOL!