Oil changes require attention to all fittings and strainers. Get a copy of shop manual ASAP. Valve adjustment also critical as tight exhaust valves have led to problems. DonĀ“t forget to service the transmission as well. Upgrade to synthetic gear lube if available (could be problem in India). In moist climates pay attention to wheel bearings. Also, eventually you will need to check, replace as necessary and lube the steering head bearings. Believe it or not, your best friends might be found at Royal Enfield shops.