Took my 670 and 500 out on friday and saturday. The 500 ran like a charm. The 670 wont idle. it started on friday night and did it all sturday. i talked with a couple of people and most said that it was probably my pilot jet because it will idle at 1000 rpm and then go to 500rpm and start sputtering and die and all this happens with in 15 to 20 seceonds. But when it does that the clutch engages at 1500 to 2000 rpm. what do i need to do.