When using the reverse button towards the end of last season (April) my motor would just die. Then after 4-5 attempts of the reverse it would finally go into reverse, but understanding each time you tried the reverse button the motor would die. I also noticed variability in RPM's from 1400-1850. In April I took it to two different Polaris dealers to adjust the TPS and still it did basically the same thing. The second Polaris dealer upon further investigation found the crank lower mag side rod bearing was failing which was determined that the factory had hooked the oil lines incorrectly. Dealer changed crank out and still doing the same thing with reverse not working. So the dealer today has changed out the reverse button, two new pistons even though compression was OK, new stator, new magneto, new Polaris pipe/muffler, new fuel rail, new throttle bodies, new fuel pump/filter, it is still doing the same thing with reverse. Forgot to mention the dealer has totally inspected the wiring harness and all connections/plugs have been taken apart and put back together with dielectric grease. Dealer now changing out the wiring harness today. Needless to say dealer is extremely frustrated with the ME, Polaris and the entire process. Can anyone think of anything else that it could be that Polaris, and the dealer hasn't already tried? I'm thinking this sled was built on a Monday after a Viking loss! Thanks in advance!