So i have a 2004 SV650, and its been lately having a problem i cant seem to solve. About a month ago i was cruising at around 70-80mph and the RPM dropped all the down to zero. I couldnt give it any gas but the engine was still running. A couple seconds later the RPMs went back up to normal and was running fine. This happened about 3 more times that day until i got off the freeway. I changed the spark plugs and the air filter and the bike was running great, but when i decided to go on a ride on the freeway at about 80mph it happened again. Any ideas on what could be the problem?