--> RotaxEngines-List message posted by: "Roger Lee" This really isn't a tough problem. From just what you described and if it really is coming from between the cylinder and head then it may only need one of two things. First you can try the easy thing. Just remove the valve cover and loosen each of the 4 nuts one at a time and re-torque them. Torque them to 90 in/lbs then 180 degrees more. This is the easy fix if it works and it might work just fine. If not then you'll need to pull off just the head and get a little lapping compound and re-seat the head against the metal cylinder surface. Then torque them down. Look in the Rotax Heavy Maint. manual, section 72-00-00, page 92, paragraph 3.16.4 on cylinder head fitting. (revision page dated Oct. 1 , 2010). The first fix will only take 15 min. start to finish. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=333562#333562 _-============================================================ _-= - The RotaxEngines-List Email Forum - _-= Use the Matronics List Features Navigator to browse _-= the many List utilities such as List Un/Subscription, _-= Archive Search & Download, 7-Day Browse, Chat, FAQ, _-= Photoshare, and much much more: _-= _-= --> http://www.matronics.com/Navigator?RotaxEngines-List _-= _-============================================================ _-= - MATRONICS WEB FORUMS - _-= Same great content also available via the Web Forums! _-= _-= --> http://forums.matronics.com _-= _-============================================================ _-= - List Contribution Web Site - _-= Thank you for your generous support! _-= -Matt Dralle, List Admin. _-= --> http://www.matronics.com/contribution _-============================================================