hal5778
Member
Hello everyone I hope someone can help with this problem. I purchased a 96 Sportster with the single 717cc Rotax at the time of purchase it was blowing a water and oil mixture out of the spark plug holes so I pulled the motor and flushed out the block using a mixture of gasoline and oil which seems to have done a decent job on removing any water or contaminated oil. I reassembled the motor using new Orings on the head and head cover and torqued the bolts to specs and sequence. Are the ONLY gaskets required the Orings and not a normal head gasket? Should I put some kind of sealer on the surfaces of the head and head cover? My problem is the motor will start but at an idle it seems to surge up and down on the rpms and when I accelerate there is no response to speak of seems like the motor is bogging down. I have drained and added fresh fuel,cleaned the carburetors,checked the timing (set to 159 degrees) and really dont know where to go from here any help would be greatly appreciated