hi peeps! need ur advise on this, revo EFI 98 model -118,000km odo... is top overhaul (machine shop) the ONLY SOLUTION pra makuha ung half ng spark plug na naiwan sa socket hole nya. naputol kse ung spark plug while in use ung oto, tas ung threaded part lng ang naiwan sa loob. dinala ko sa RAPIDE and their charging me : 4,500 for pull down ng engine and reinstallation, 7,200 for machine shop (includes valve setting,valve seat reface,lapping,hydrautest,steam wash) plus 1620 changeoil,filter , spark plug.sabi nla since ioopen ung cylinder head might as well do a top overhaul. wat do u think? appreciate ur response..