Good morning everyone, Me and my friend both have almost the same setup for our DRZ CW big bore hotcam FCR 39 with MRD and we both seems to have the Coolant bottle that fills itself up issue. I looked around on here and it seems from what I red that it would be a Headgasket but I will try a couple test tonight to make sure that it is. I will let it run with the cap off and see if there's bubble and I will also make sure that that return coolant hose is not blocked or something. Even after we leave our bike for the night 12 hours and we come back and open the cap there's a lot of pressure that comes out. I don't have coolant in my oil and I don't have oil in my coolant. can someone let me know if I am on the right track and also if there's somehting else I can verify before I do the headgasket. now I found a place where I live that sells the spray copper gasket and I was wondering where and wich Gasket should I get.. I know that theres a kit on ebay but for almost 50$ and was wondering if thats the right one. http://cgi.ebay.ca/COMETIC-TOP-END-GASKET-KIT-SUZUKI-DRZ440-434CC-00-05-/120686516608?pt=Motorcycles_Parts_Accessories&hash=item1c197a1980 also I saw on here that the head bolt should be torqued to 42 instead of 33.5 as I did from a walkthrough when I installed the Bigbore I would like to get a confirmation from someone on here. Any advice would be also much apreciated. thanks everyone, Marc.