it looks like i am not going to be able to keep the sensors in so i am going to go the sensor eliminator route i don't want to just put a couple of resistors in and cobra only make eliminators for the 2000 which apparently don't fit the 900 so i found this alternative. their is a guy on eBay (bk racing parts) he sells a specific lambada (o2) sensor eliminators he didn't have them advertised for the 900 but i emailed him and he does sell them and does post world wide here is a link if any body is interested
http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123
and this is the fitting guide it looks pretty straight forward
http://nitroxchips.com/eshop/info/O2EL.html
once they have arrived and i have installed them i will update and let you know how easy the install is and if they work