MC-D250-RTC questions?

[ProDigit]

I noted that the sports version has a ~46T rear sprocket, and the naked version has a ~42T sprocket.

1- What are the front sprocket tooth count of these bikes?
2- Is there a larger front sprocket available for these bikes?
3- And is there a magnetic oil filter or oil plug compatible with this bike?
4- Aside from handlebar riser pieces, is there a way to get the handles closer to the chest? (more up and towards the rider)?

Why are with almost all bikes except BMW, that the arms have to be stretched, or the body bent forward? Why are there so few bikes with the correct handlebar position?
For a sports bike I understand it has to be as low as possible; but for every standard bike, or cruiser bike I've been on, the handlebars are always at least 3 inches too far forward for a tall person like me (6ft 3in).

Thank you!

[ProDigit]

No one???

I'm reading up on the DongFang bobber RTB.
Is it using the same engine/transmission/gearing?