Please shop around and don't jump into the first contact that you get. Some put on a very flowery sales and marketing strategies, but disappoint on service. You may tend to write off GROGON, NGARA, MAKABURINI mechanics, but let me assure you, the boys can do a good job if not better than the "Authorised" up market garages. Talking out of experience.
While at it, can some one tel me the RECOMMENDED/BEST spark plugs for ALLION 1800cc. Much blessings