Originally Posted by 2door
Have you actually measured the bore and stroke to confirm the CCs? Obviously someone has installed an aftermarket slant head. I don't know of any (I might be wrong here) that had 6mm stud holes so the head must flop around somewhat on the small studs. Will that present a problem seating the head on the gasket sealing surface or are you going to use a 49 head?
That is the original head off a Naitong JaiLi 48cc motor and they have 6 mm holes. The 48 cc cylinders had 6 mm holes too.
Mine had the JL logo cast on the underside of the head and on some of the covers.
They also made a 48cc with the same round exhaust port and an iron liner.
The carb bolted right on the back of the cylinder so did not use an intake.