These things are what I suggest:
1] Motul is a good brand. In most cases, stick to the manufacturer recommended grade of oil.
I think Hero Motu recommends 10W30 but some have used 20W40 too.
2] How To Improve Pick-up / Horse Power: Get Bangaluru's Joel's free flow exhaust and other performance accessories... Mail him at joel(at the rate of)raceconcepts.in. Joel is a MotoGP Engineer working for Team Ten10 Racing. So, don't get cheap exhausts from other places, it might screw your bike.
4] Rear Tire? You'll have to clarify what you need? Need Grip or power or size? A 120 section tyre should be good enough. Or Try getting the 130/70 from the new R15. Upsizing might result in more grip but lesser acceleration.
Also, you can make both tyres tubeless tyres
5] Sprockets? A 38 teeth rear P200's sprocket will reduce your acceleration and increase top end, or in professional biker's words: it will overgear your bike. Highway mileage & cruising speed will increase too. Do it only if you are ok with slightly lesser acceleration.
7] Plug? You can get a compatible NGK Spark plug, but it might give only slightly better mileage, maintenance, emissions, etc. but no noticeable power increase.
9] Chain: You can go for open chain for looks purpose, and use plastic (overchain) chain covers from P200/P220 or other bikes.
Don't mess with other things that I have skipped/ not mentioned. Because it might get you in problems or are expensive/ unnecessary.