Ask the dealer if they tested the tps itself. I have had 2 people tell me they had problems with it on 2 different quads (outlaw 525 and yfz450). Also, Your fuel pump might have a problem. Did you have the recall on the tank? If they reinstalled a new tank, it might have been damaged. just my 2 cents. I hope you find out whats wrong because these bikes rock with just a few upgrades. Oh, 1 other thing, you mentioned that it was right before a monster double, any chance the rollover sensor under the hood could be loose? I have heard of this causing some grief as well.