My 2000 year zx12r gets heated very fast in the city. I have replaced genuine Oil filter and synthetic oil (castrol GTX 20-50W). Coolant is ok. Till date it has covered 18000 kms. It is Malaysian Model (hazard type). How to replace spark plugs ? Do I have to pull down the Engine? From where I can obtain workshop Manual ? Please give me web site from where I can get hints regards proper maintenance, parts catalogue, trouble shooting and to keep the machine in optimum condition. Thank you. Best Regards. God Bless You. Najaf.